[Bug 1020436] Re: Cannot read superblock after FC multipath failover

Steve Fisher stefan.nicolaivic at gmail.com
Tue Jul 10 05:39:24 UTC 2012


-- lvm.conf blacklist should be fine, searches /dev but filters all
/dev/sd.*

I'll attach those files momentarily.

I didn't see any kpartx processes running at all; there wasn't anything
in an uninterruptable sleep state ('D') either.

Listing all kernel and some additional processes here (removed stuff
like apache / php processes and certain publicly identifiable stuff
that's not relevant)

USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root         1  0.6  0.0  23828  2064 ?        Ss   14:59   0:04 /sbin/init
root         2  0.0  0.0      0     0 ?        S    14:59   0:00 [kthreadd]
root         3  0.0  0.0      0     0 ?        S    14:59   0:00 [migration/0]
root         4  0.0  0.0      0     0 ?        S    14:59   0:00 [ksoftirqd/0]
root         5  0.0  0.0      0     0 ?        S    14:59   0:00 [watchdog/0]
root         6  0.0  0.0      0     0 ?        S    14:59   0:00 [migration/1]
root         7  0.0  0.0      0     0 ?        S    14:59   0:00 [ksoftirqd/1]
root         8  0.0  0.0      0     0 ?        S    14:59   0:00 [watchdog/1]
root         9  0.0  0.0      0     0 ?        S    14:59   0:00 [migration/2]
root        10  0.0  0.0      0     0 ?        S    14:59   0:00 [ksoftirqd/2]
root        11  0.0  0.0      0     0 ?        S    14:59   0:00 [watchdog/2]
root        12  0.0  0.0      0     0 ?        S    14:59   0:00 [migration/3]
root        13  0.0  0.0      0     0 ?        S    14:59   0:00 [ksoftirqd/3]
root        14  0.0  0.0      0     0 ?        S    14:59   0:00 [watchdog/3]
root        15  0.0  0.0      0     0 ?        S    14:59   0:00 [migration/4]
root        16  0.0  0.0      0     0 ?        S    14:59   0:00 [ksoftirqd/4]
root        17  0.0  0.0      0     0 ?        S    14:59   0:00 [watchdog/4]
root        18  0.0  0.0      0     0 ?        S    14:59   0:00 [migration/5]
root        19  0.0  0.0      0     0 ?        S    14:59   0:00 [ksoftirqd/5]
root        20  0.0  0.0      0     0 ?        S    14:59   0:00 [watchdog/5]
root        21  0.0  0.0      0     0 ?        S    14:59   0:00 [migration/6]
root        22  0.0  0.0      0     0 ?        S    14:59   0:00 [ksoftirqd/6]
root        23  0.0  0.0      0     0 ?        S    14:59   0:00 [watchdog/6]
root        24  0.0  0.0      0     0 ?        S    14:59   0:00 [migration/7]
root        25  0.1  0.0      0     0 ?        S    14:59   0:01 [ksoftirqd/7]
root        26  0.0  0.0      0     0 ?        S    14:59   0:00 [watchdog/7]
root        27  0.0  0.0      0     0 ?        S    14:59   0:00 [migration/8]
root        28  0.0  0.0      0     0 ?        S    14:59   0:00 [ksoftirqd/8]
root        29  0.0  0.0      0     0 ?        S    14:59   0:00 [watchdog/8]
root        30  0.0  0.0      0     0 ?        S    14:59   0:00 [migration/9]
root        31  0.0  0.0      0     0 ?        S    14:59   0:00 [ksoftirqd/9]
root        32  0.0  0.0      0     0 ?        S    14:59   0:00 [watchdog/9]
root        33  0.0  0.0      0     0 ?        S    14:59   0:00 [migration/10]
root        34  0.0  0.0      0     0 ?        S    14:59   0:00 [ksoftirqd/10]
root        35  0.0  0.0      0     0 ?        S    14:59   0:00 [watchdog/10]
root        36  0.0  0.0      0     0 ?        S    14:59   0:00 [migration/11]
root        37  0.0  0.0      0     0 ?        S    14:59   0:00 [ksoftirqd/11]
root        38  0.0  0.0      0     0 ?        S    14:59   0:00 [watchdog/11]
root        39  0.0  0.0      0     0 ?        S    14:59   0:00 [migration/12]
root        40  0.0  0.0      0     0 ?        S    14:59   0:00 [ksoftirqd/12]
root        41  0.0  0.0      0     0 ?        S    14:59   0:00 [watchdog/12]
root        42  0.0  0.0      0     0 ?        S    14:59   0:00 [migration/13]
root        43  0.0  0.0      0     0 ?        S    14:59   0:00 [ksoftirqd/13]
root        44  0.0  0.0      0     0 ?        S    14:59   0:00 [watchdog/13]
root        45  0.0  0.0      0     0 ?        S    14:59   0:00 [migration/14]
root        46  0.0  0.0      0     0 ?        S    14:59   0:00 [ksoftirqd/14]
root        47  0.0  0.0      0     0 ?        S    14:59   0:00 [watchdog/14]
root        48  0.0  0.0      0     0 ?        S    14:59   0:00 [migration/15]
root        49  0.0  0.0      0     0 ?        S    14:59   0:00 [ksoftirqd/15]
root        50  0.0  0.0      0     0 ?        S    14:59   0:00 [watchdog/15]
root        51  0.0  0.0      0     0 ?        S    14:59   0:00 [migration/16]
root        52  0.0  0.0      0     0 ?        S    14:59   0:00 [ksoftirqd/16]
root        53  0.0  0.0      0     0 ?        S    14:59   0:00 [watchdog/16]
root        54  0.0  0.0      0     0 ?        S    14:59   0:00 [migration/17]
root        55  0.0  0.0      0     0 ?        S    14:59   0:00 [ksoftirqd/17]
root        56  0.0  0.0      0     0 ?        S    14:59   0:00 [watchdog/17]
root        57  0.0  0.0      0     0 ?        S    14:59   0:00 [migration/18]
root        58  0.0  0.0      0     0 ?        S    14:59   0:00 [ksoftirqd/18]
root        59  0.0  0.0      0     0 ?        S    14:59   0:00 [watchdog/18]
root        60  0.0  0.0      0     0 ?        S    14:59   0:00 [migration/19]
root        61  0.0  0.0      0     0 ?        S    14:59   0:00 [ksoftirqd/19]
root        62  0.0  0.0      0     0 ?        S    14:59   0:00 [watchdog/19]
root        63  0.0  0.0      0     0 ?        S    14:59   0:00 [migration/20]
root        64  0.0  0.0      0     0 ?        S    14:59   0:00 [ksoftirqd/20]
root        65  0.0  0.0      0     0 ?        S    14:59   0:00 [watchdog/20]
root        66  0.0  0.0      0     0 ?        S    14:59   0:00 [migration/21]
root        67  0.0  0.0      0     0 ?        S    14:59   0:00 [ksoftirqd/21]
root        68  0.0  0.0      0     0 ?        S    14:59   0:00 [watchdog/21]
root        69  0.0  0.0      0     0 ?        S    14:59   0:00 [migration/22]
root        70  0.0  0.0      0     0 ?        S    14:59   0:00 [ksoftirqd/22]
root        71  0.0  0.0      0     0 ?        S    14:59   0:00 [watchdog/22]
root        72  0.0  0.0      0     0 ?        S    14:59   0:00 [migration/23]
root        73  0.0  0.0      0     0 ?        S    14:59   0:00 [ksoftirqd/23]
root        74  0.0  0.0      0     0 ?        S    14:59   0:00 [watchdog/23]
root        75  0.0  0.0      0     0 ?        S    14:59   0:00 [events/0]
root        76  0.0  0.0      0     0 ?        S    14:59   0:00 [events/1]
root        77  0.0  0.0      0     0 ?        S    14:59   0:00 [events/2]
root        78  0.0  0.0      0     0 ?        S    14:59   0:00 [events/3]
root        79  0.0  0.0      0     0 ?        S    14:59   0:00 [events/4]
root        80  0.0  0.0      0     0 ?        S    14:59   0:00 [events/5]
root        81  0.0  0.0      0     0 ?        S    14:59   0:00 [events/6]
root        82  0.0  0.0      0     0 ?        S    14:59   0:00 [events/7]
root        83  0.0  0.0      0     0 ?        S    14:59   0:00 [events/8]
root        84  0.0  0.0      0     0 ?        S    14:59   0:00 [events/9]
root        85  0.0  0.0      0     0 ?        S    14:59   0:00 [events/10]
root        86  0.0  0.0      0     0 ?        S    14:59   0:00 [events/11]
root        87  0.0  0.0      0     0 ?        S    14:59   0:00 [events/12]
root        88  0.0  0.0      0     0 ?        S    14:59   0:00 [events/13]
root        89  0.0  0.0      0     0 ?        S    14:59   0:00 [events/14]
root        90  0.0  0.0      0     0 ?        S    14:59   0:00 [events/15]
root        91  0.0  0.0      0     0 ?        S    14:59   0:00 [events/16]
root        92  0.0  0.0      0     0 ?        S    14:59   0:00 [events/17]
root        93  0.0  0.0      0     0 ?        S    14:59   0:00 [events/18]
root        94  0.0  0.0      0     0 ?        S    14:59   0:00 [events/19]
root        95  0.0  0.0      0     0 ?        S    14:59   0:00 [events/20]
root        96  0.0  0.0      0     0 ?        S    14:59   0:00 [events/21]
root        97  0.0  0.0      0     0 ?        S    14:59   0:00 [events/22]
root        98  0.0  0.0      0     0 ?        S    14:59   0:00 [events/23]
root        99  0.0  0.0      0     0 ?        S    14:59   0:00 [cpuset]
root       100  0.0  0.0      0     0 ?        S    14:59   0:00 [khelper]
root       101  0.0  0.0      0     0 ?        S    14:59   0:00 [netns]
root       102  0.0  0.0      0     0 ?        S    14:59   0:00 [async/mgr]
root       103  0.0  0.0      0     0 ?        S    14:59   0:00 [pm]
root       105  0.0  0.0      0     0 ?        S    14:59   0:00 [sync_supers]
root       106  0.0  0.0      0     0 ?        S    14:59   0:00 [bdi-default]
root       107  0.0  0.0      0     0 ?        S    14:59   0:00 [kintegrityd/0]
root       108  0.0  0.0      0     0 ?        S    14:59   0:00 [kintegrityd/1]
root       109  0.0  0.0      0     0 ?        S    14:59   0:00 [kintegrityd/2]
root       110  0.0  0.0      0     0 ?        S    14:59   0:00 [kintegrityd/3]
root       111  0.0  0.0      0     0 ?        S    14:59   0:00 [kintegrityd/4]
root       112  0.0  0.0      0     0 ?        S    14:59   0:00 [kintegrityd/5]
root       113  0.0  0.0      0     0 ?        S    14:59   0:00 [kintegrityd/6]
root       114  0.0  0.0      0     0 ?        S    14:59   0:00 [kintegrityd/7]
root       115  0.0  0.0      0     0 ?        S    14:59   0:00 [kintegrityd/8]
root       116  0.0  0.0      0     0 ?        S    14:59   0:00 [kintegrityd/9]
root       117  0.0  0.0      0     0 ?        S    14:59   0:00 [kintegrityd/10]
root       118  0.0  0.0      0     0 ?        S    14:59   0:00 [kintegrityd/11]
root       119  0.0  0.0      0     0 ?        S    14:59   0:00 [kintegrityd/12]
root       120  0.0  0.0      0     0 ?        S    14:59   0:00 [kintegrityd/13]
root       121  0.0  0.0      0     0 ?        S    14:59   0:00 [kintegrityd/14]
root       122  0.0  0.0      0     0 ?        S    14:59   0:00 [kintegrityd/15]
root       123  0.0  0.0      0     0 ?        S    14:59   0:00 [kintegrityd/16]
root       124  0.0  0.0      0     0 ?        S    14:59   0:00 [kintegrityd/17]
root       125  0.0  0.0      0     0 ?        S    14:59   0:00 [kintegrityd/18]
root       126  0.0  0.0      0     0 ?        S    14:59   0:00 [kintegrityd/19]
root       127  0.0  0.0      0     0 ?        S    14:59   0:00 [kintegrityd/20]
root       128  0.0  0.0      0     0 ?        S    14:59   0:00 [kintegrityd/21]
root       129  0.0  0.0      0     0 ?        S    14:59   0:00 [kintegrityd/22]
root       130  0.0  0.0      0     0 ?        S    14:59   0:00 [kintegrityd/23]
root       131  0.0  0.0      0     0 ?        S    14:59   0:00 [kblockd/0]
root       132  0.0  0.0      0     0 ?        S    14:59   0:00 [kblockd/1]
root       133  0.0  0.0      0     0 ?        S    14:59   0:00 [kblockd/2]
root       134  0.0  0.0      0     0 ?        S    14:59   0:00 [kblockd/3]
root       135  0.0  0.0      0     0 ?        S    14:59   0:00 [kblockd/4]
root       136  0.0  0.0      0     0 ?        S    14:59   0:00 [kblockd/5]
root       137  0.0  0.0      0     0 ?        S    14:59   0:00 [kblockd/6]
root       138  0.0  0.0      0     0 ?        S    14:59   0:00 [kblockd/7]
root       139  0.0  0.0      0     0 ?        S    14:59   0:00 [kblockd/8]
root       140  0.0  0.0      0     0 ?        S    14:59   0:00 [kblockd/9]
root       141  0.0  0.0      0     0 ?        S    14:59   0:00 [kblockd/10]
root       142  0.0  0.0      0     0 ?        S    14:59   0:00 [kblockd/11]
root       143  0.0  0.0      0     0 ?        S    14:59   0:00 [kblockd/12]
root       144  0.0  0.0      0     0 ?        S    14:59   0:00 [kblockd/13]
root       145  0.0  0.0      0     0 ?        S    14:59   0:00 [kblockd/14]
root       146  0.0  0.0      0     0 ?        S    14:59   0:00 [kblockd/15]
root       147  0.0  0.0      0     0 ?        S    14:59   0:00 [kblockd/16]
root       148  0.0  0.0      0     0 ?        S    14:59   0:00 [kblockd/17]
root       149  0.0  0.0      0     0 ?        S    14:59   0:00 [kblockd/18]
root       150  0.0  0.0      0     0 ?        S    14:59   0:00 [kblockd/19]
root       151  0.0  0.0      0     0 ?        S    14:59   0:00 [kblockd/20]
root       152  0.0  0.0      0     0 ?        S    14:59   0:00 [kblockd/21]
root       153  0.0  0.0      0     0 ?        S    14:59   0:00 [kblockd/22]
root       154  0.0  0.0      0     0 ?        S    14:59   0:00 [kblockd/23]
root       155  0.0  0.0      0     0 ?        S    14:59   0:00 [kacpid]
root       156  0.0  0.0      0     0 ?        S    14:59   0:00 [kacpi_notify]
root       157  0.0  0.0      0     0 ?        S    14:59   0:00 [kacpi_hotplug]
root       158  0.0  0.0      0     0 ?        S    14:59   0:00 [ata/0]
root       159  0.0  0.0      0     0 ?        S    14:59   0:00 [ata/1]
root       160  0.0  0.0      0     0 ?        S    14:59   0:00 [ata/2]
root       161  0.0  0.0      0     0 ?        S    14:59   0:00 [ata/3]
root       162  0.0  0.0      0     0 ?        S    14:59   0:00 [ata/4]
root       163  0.0  0.0      0     0 ?        S    14:59   0:00 [ata/5]
root       164  0.0  0.0      0     0 ?        S    14:59   0:00 [ata/6]
root       165  0.0  0.0      0     0 ?        S    14:59   0:00 [ata/7]
root       166  0.0  0.0      0     0 ?        S    14:59   0:00 [ata/8]
root       167  0.0  0.0      0     0 ?        S    14:59   0:00 [ata/9]
root       168  0.0  0.0      0     0 ?        S    14:59   0:00 [ata/10]
root       169  0.0  0.0      0     0 ?        S    14:59   0:00 [ata/11]
root       170  0.0  0.0      0     0 ?        S    14:59   0:00 [ata/12]
root       171  0.0  0.0      0     0 ?        S    14:59   0:00 [ata/13]
root       172  0.0  0.0      0     0 ?        S    14:59   0:00 [ata/14]
root       173  0.0  0.0      0     0 ?        S    14:59   0:00 [ata/15]
root       174  0.0  0.0      0     0 ?        S    14:59   0:00 [ata/16]
root       175  0.0  0.0      0     0 ?        S    14:59   0:00 [ata/17]
root       176  0.0  0.0      0     0 ?        S    14:59   0:00 [ata/18]
root       177  0.0  0.0      0     0 ?        S    14:59   0:00 [ata/19]
root       178  0.0  0.0      0     0 ?        S    14:59   0:00 [ata/20]
root       179  0.0  0.0      0     0 ?        S    14:59   0:00 [ata/21]
root       180  0.0  0.0      0     0 ?        S    14:59   0:00 [ata/22]
root       181  0.0  0.0      0     0 ?        S    14:59   0:00 [ata/23]
root       182  0.0  0.0      0     0 ?        S    14:59   0:00 [ata_aux]
root       183  0.0  0.0      0     0 ?        S    14:59   0:00 [ksuspend_usbd]
root       184  0.0  0.0      0     0 ?        S    14:59   0:00 [khubd]
root       185  0.0  0.0      0     0 ?        S    14:59   0:00 [kseriod]
root       186  0.0  0.0      0     0 ?        S    14:59   0:00 [kmmcd]
root       211  0.0  0.0      0     0 ?        S    14:59   0:00 [khungtaskd]
root       212  0.0  0.0      0     0 ?        S    14:59   0:00 [kswapd0]
root       213  0.0  0.0      0     0 ?        S    14:59   0:00 [kswapd1]
root       214  0.0  0.0      0     0 ?        SN   14:59   0:00 [ksmd]
root       215  0.0  0.0      0     0 ?        S    14:59   0:00 [aio/0]
root       216  0.0  0.0      0     0 ?        S    14:59   0:00 [aio/1]
root       217  0.0  0.0      0     0 ?        S    14:59   0:00 [aio/2]
root       218  0.0  0.0      0     0 ?        S    14:59   0:00 [aio/3]
root       219  0.0  0.0      0     0 ?        S    14:59   0:00 [aio/4]
root       220  0.0  0.0      0     0 ?        S    14:59   0:00 [aio/5]
root       221  0.0  0.0      0     0 ?        S    14:59   0:00 [aio/6]
root       222  0.0  0.0      0     0 ?        S    14:59   0:00 [aio/7]
root       223  0.0  0.0      0     0 ?        S    14:59   0:00 [aio/8]
root       224  0.0  0.0      0     0 ?        S    14:59   0:00 [aio/9]
root       225  0.0  0.0      0     0 ?        S    14:59   0:00 [aio/10]
root       226  0.0  0.0      0     0 ?        S    14:59   0:00 [aio/11]
root       227  0.0  0.0      0     0 ?        S    14:59   0:00 [aio/12]
root       228  0.0  0.0      0     0 ?        S    14:59   0:00 [aio/13]
root       229  0.0  0.0      0     0 ?        S    14:59   0:00 [aio/14]
root       230  0.0  0.0      0     0 ?        S    14:59   0:00 [aio/15]
root       231  0.0  0.0      0     0 ?        S    14:59   0:00 [aio/16]
root       232  0.0  0.0      0     0 ?        S    14:59   0:00 [aio/17]
root       233  0.0  0.0      0     0 ?        S    14:59   0:00 [aio/18]
root       234  0.0  0.0      0     0 ?        S    14:59   0:00 [aio/19]
root       235  0.0  0.0      0     0 ?        S    14:59   0:00 [aio/20]
root       236  0.0  0.0      0     0 ?        S    14:59   0:00 [aio/21]
root       237  0.0  0.0      0     0 ?        S    14:59   0:00 [aio/22]
root       238  0.0  0.0      0     0 ?        S    14:59   0:00 [aio/23]
root       239  0.0  0.0      0     0 ?        S    14:59   0:00 [ecryptfs-kthrea]
root       240  0.0  0.0      0     0 ?        S    14:59   0:00 [crypto/0]
root       241  0.0  0.0      0     0 ?        S    14:59   0:00 [crypto/1]
root       242  0.0  0.0      0     0 ?        S    14:59   0:00 [crypto/2]
root       243  0.0  0.0      0     0 ?        S    14:59   0:00 [crypto/3]
root       244  0.0  0.0      0     0 ?        S    14:59   0:00 [crypto/4]
root       245  0.0  0.0      0     0 ?        S    14:59   0:00 [crypto/5]
root       246  0.0  0.0      0     0 ?        S    14:59   0:00 [crypto/6]
root       247  0.0  0.0      0     0 ?        S    14:59   0:00 [crypto/7]
root       248  0.0  0.0      0     0 ?        S    14:59   0:00 [crypto/8]
root       249  0.0  0.0      0     0 ?        S    14:59   0:00 [crypto/9]
root       250  0.0  0.0      0     0 ?        S    14:59   0:00 [crypto/10]
root       251  0.0  0.0      0     0 ?        S    14:59   0:00 [crypto/11]
root       252  0.0  0.0      0     0 ?        S    14:59   0:00 [crypto/12]
root       253  0.0  0.0      0     0 ?        S    14:59   0:00 [crypto/13]
root       254  0.0  0.0      0     0 ?        S    14:59   0:00 [crypto/14]
root       255  0.0  0.0      0     0 ?        S    14:59   0:00 [crypto/15]
root       256  0.0  0.0      0     0 ?        S    14:59   0:00 [crypto/16]
root       257  0.0  0.0      0     0 ?        S    14:59   0:00 [crypto/17]
root       258  0.0  0.0      0     0 ?        S    14:59   0:00 [crypto/18]
root       259  0.0  0.0      0     0 ?        S    14:59   0:00 [crypto/19]
root       260  0.0  0.0      0     0 ?        S    14:59   0:00 [crypto/20]
root       261  0.0  0.0      0     0 ?        S    14:59   0:00 [crypto/21]
root       262  0.0  0.0      0     0 ?        S    14:59   0:00 [crypto/22]
root       263  0.0  0.0      0     0 ?        S    14:59   0:00 [crypto/23]
root       266  0.0  0.0      0     0 ?        S    14:59   0:00 [scsi_eh_0]
root       267  0.0  0.0      0     0 ?        S    14:59   0:00 [scsi_eh_1]
root       268  0.0  0.0      0     0 ?        S    14:59   0:00 [scsi_eh_2]
root       271  0.0  0.0      0     0 ?        S    14:59   0:00 [scsi_eh_3]
root       274  0.0  0.0      0     0 ?        S    14:59   0:00 [kstriped]
root       275  0.0  0.0      0     0 ?        S    14:59   0:00 [kmpathd/0]
root       276  0.0  0.0      0     0 ?        S    14:59   0:00 [kmpathd/1]
root       277  0.0  0.0      0     0 ?        S    14:59   0:00 [kmpathd/2]
root       278  0.0  0.0      0     0 ?        S    14:59   0:00 [kmpathd/3]
root       279  0.0  0.0      0     0 ?        S    14:59   0:00 [kmpathd/4]
root       280  0.0  0.0      0     0 ?        S    14:59   0:00 [kmpathd/5]
root       281  0.0  0.0      0     0 ?        S    14:59   0:00 [kmpathd/6]
root       282  0.0  0.0      0     0 ?        S    14:59   0:00 [kmpathd/7]
root       283  0.0  0.0      0     0 ?        S    14:59   0:00 [kmpathd/8]
root       284  0.0  0.0      0     0 ?        S    14:59   0:00 [kmpathd/9]
root       285  0.0  0.0      0     0 ?        S    14:59   0:00 [kmpathd/10]
root       286  0.0  0.0      0     0 ?        S    14:59   0:00 [kmpathd/11]
root       287  0.0  0.0      0     0 ?        S    14:59   0:00 [kmpathd/12]
root       288  0.0  0.0      0     0 ?        S    14:59   0:00 [kmpathd/13]
root       289  0.0  0.0      0     0 ?        S    14:59   0:00 [kmpathd/14]
root       290  0.0  0.0      0     0 ?        S    14:59   0:00 [kmpathd/15]
root       291  0.0  0.0      0     0 ?        S    14:59   0:00 [kmpathd/16]
root       292  0.0  0.0      0     0 ?        S    14:59   0:00 [kmpathd/17]
root       293  0.0  0.0      0     0 ?        S    14:59   0:00 [kmpathd/18]
root       294  0.0  0.0      0     0 ?        S    14:59   0:00 [kmpathd/19]
root       295  0.0  0.0      0     0 ?        S    14:59   0:00 [kmpathd/20]
root       296  0.0  0.0      0     0 ?        S    14:59   0:00 [kmpathd/21]
root       297  0.0  0.0      0     0 ?        S    14:59   0:00 [kmpathd/22]
root       298  0.0  0.0      0     0 ?        S    14:59   0:00 [kmpathd/23]
root       299  0.0  0.0      0     0 ?        S    14:59   0:00 [kmpath_handlerd]
root       300  0.0  0.0      0     0 ?        S    14:59   0:00 [ksnapd]
root       301  0.0  0.0      0     0 ?        S    14:59   0:00 [kondemand/0]
root       302  0.0  0.0      0     0 ?        S    14:59   0:00 [kondemand/1]
root       303  0.0  0.0      0     0 ?        S    14:59   0:00 [kondemand/2]
root       304  0.0  0.0      0     0 ?        S    14:59   0:00 [kondemand/3]
root       305  0.0  0.0      0     0 ?        S    14:59   0:00 [kondemand/4]
root       306  0.0  0.0      0     0 ?        S    14:59   0:00 [kondemand/5]
root       307  0.0  0.0      0     0 ?        S    14:59   0:00 [kondemand/6]
root       308  0.0  0.0      0     0 ?        S    14:59   0:00 [kondemand/7]
root       309  0.0  0.0      0     0 ?        S    14:59   0:00 [kondemand/8]
root       310  0.0  0.0      0     0 ?        S    14:59   0:00 [kondemand/9]
root       311  0.0  0.0      0     0 ?        S    14:59   0:00 [kondemand/10]
root       312  0.0  0.0      0     0 ?        S    14:59   0:00 [kondemand/11]
root       313  0.0  0.0      0     0 ?        S    14:59   0:00 [kondemand/12]
root       314  0.0  0.0      0     0 ?        S    14:59   0:00 [kondemand/13]
root       315  0.0  0.0      0     0 ?        S    14:59   0:00 [kondemand/14]
root       316  0.0  0.0      0     0 ?        S    14:59   0:00 [kondemand/15]
root       317  0.0  0.0      0     0 ?        S    14:59   0:00 [kondemand/16]
root       318  0.0  0.0      0     0 ?        S    14:59   0:00 [kondemand/17]
root       319  0.0  0.0      0     0 ?        S    14:59   0:00 [kondemand/18]
root       320  0.0  0.0      0     0 ?        S    14:59   0:00 [kondemand/19]
root       321  0.0  0.0      0     0 ?        S    14:59   0:00 [kondemand/20]
root       322  0.0  0.0      0     0 ?        S    14:59   0:00 [kondemand/21]
root       323  0.0  0.0      0     0 ?        S    14:59   0:00 [kondemand/22]
root       324  0.0  0.0      0     0 ?        S    14:59   0:00 [kondemand/23]
root       325  0.0  0.0      0     0 ?        S    14:59   0:00 [kconservative/0]
root       326  0.0  0.0      0     0 ?        S    14:59   0:00 [kconservative/1]
root       327  0.0  0.0      0     0 ?        S    14:59   0:00 [kconservative/2]
root       328  0.0  0.0      0     0 ?        S    14:59   0:00 [kconservative/3]
root       329  0.0  0.0      0     0 ?        S    14:59   0:00 [kconservative/4]
root       330  0.0  0.0      0     0 ?        S    14:59   0:00 [kconservative/5]
root       331  0.0  0.0      0     0 ?        S    14:59   0:00 [kconservative/6]
root       332  0.0  0.0      0     0 ?        S    14:59   0:00 [kconservative/7]
root       333  0.0  0.0      0     0 ?        S    14:59   0:00 [kconservative/8]
root       334  0.0  0.0      0     0 ?        S    14:59   0:00 [kconservative/9]
root       335  0.0  0.0      0     0 ?        S    14:59   0:00 [kconservative/1]
root       336  0.0  0.0      0     0 ?        S    14:59   0:00 [kconservative/1]
root       337  0.0  0.0      0     0 ?        S    14:59   0:00 [kconservative/1]
root       338  0.0  0.0      0     0 ?        S    14:59   0:00 [kconservative/1]
root       339  0.0  0.0      0     0 ?        S    14:59   0:00 [kconservative/1]
root       340  0.0  0.0      0     0 ?        S    14:59   0:00 [kconservative/1]
root       341  0.0  0.0      0     0 ?        S    14:59   0:00 [kconservative/1]
root       342  0.0  0.0      0     0 ?        S    14:59   0:00 [kconservative/1]
root       343  0.0  0.0      0     0 ?        S    14:59   0:00 [kconservative/1]
root       344  0.0  0.0      0     0 ?        S    14:59   0:00 [kconservative/1]
root       345  0.0  0.0      0     0 ?        S    14:59   0:00 [kconservative/2]
root       346  0.0  0.0      0     0 ?        S    14:59   0:00 [kconservative/2]
root       347  0.0  0.0      0     0 ?        S    14:59   0:00 [kconservative/2]
root       348  0.0  0.0      0     0 ?        S    14:59   0:00 [kconservative/2]
root       524  0.0  0.0      0     0 ?        S    14:59   0:00 [scsi_tgtd/0]
root       525  0.0  0.0      0     0 ?        S    14:59   0:00 [scsi_tgtd/1]
root       526  0.0  0.0      0     0 ?        S    14:59   0:00 [scsi_tgtd/2]
root       527  0.0  0.0      0     0 ?        S    14:59   0:00 [scsi_tgtd/3]
root       528  0.0  0.0      0     0 ?        S    14:59   0:00 [scsi_tgtd/4]
root       529  0.0  0.0      0     0 ?        S    14:59   0:00 [scsi_tgtd/5]
root       530  0.0  0.0      0     0 ?        S    14:59   0:00 [scsi_tgtd/6]
root       531  0.0  0.0      0     0 ?        S    14:59   0:00 [scsi_tgtd/7]
root       532  0.0  0.0      0     0 ?        S    14:59   0:00 [scsi_tgtd/8]
root       533  0.0  0.0      0     0 ?        S    14:59   0:00 [scsi_tgtd/9]
root       534  0.0  0.0      0     0 ?        S    14:59   0:00 [scsi_tgtd/10]
root       535  0.0  0.0      0     0 ?        S    14:59   0:00 [scsi_tgtd/11]
root       536  0.0  0.0      0     0 ?        S    14:59   0:00 [scsi_tgtd/12]
root       537  0.0  0.0      0     0 ?        S    14:59   0:00 [scsi_tgtd/13]
root       538  0.0  0.0      0     0 ?        S    14:59   0:00 [scsi_tgtd/14]
root       539  0.0  0.0      0     0 ?        S    14:59   0:00 [scsi_tgtd/15]
root       540  0.0  0.0      0     0 ?        S    14:59   0:00 [scsi_tgtd/16]
root       541  0.0  0.0      0     0 ?        S    14:59   0:00 [scsi_tgtd/17]
root       543  0.0  0.0      0     0 ?        S    14:59   0:00 [scsi_tgtd/18]
root       544  0.0  0.0      0     0 ?        S    14:59   0:00 [scsi_tgtd/19]
root       545  0.0  0.0      0     0 ?        S    14:59   0:00 [scsi_tgtd/20]
root       546  0.0  0.0      0     0 ?        S    14:59   0:00 [scsi_tgtd/21]
root       547  0.0  0.0      0     0 ?        S    14:59   0:00 [scsi_tgtd/22]
root       548  0.0  0.0      0     0 ?        S    14:59   0:00 [scsi_tgtd/23]
root       552  0.0  0.0      0     0 ?        S    14:59   0:00 [scsi_eh_4]
root       553  0.0  0.0      0     0 ?        S    14:59   0:00 [scsi_eh_5]
root       558  0.0  0.0      0     0 ?        S<   14:59   0:00 [qla2xxx_5_dpc]
root       559  0.0  0.0      0     0 ?        S    14:59   0:00 [scsi_wq_5]
root       560  0.0  0.0      0     0 ?        S    14:59   0:00 [fc_wq_5]
root       561  0.0  0.0      0     0 ?        S    14:59   0:00 [fc_dl_5]
root       563  0.0  0.0      0     0 ?        S    14:59   0:00 [scsi_eh_6]
root       565  0.0  0.0      0     0 ?        S<   14:59   0:00 [qla2xxx_6_dpc]
root       566  0.0  0.0      0     0 ?        S    14:59   0:00 [scsi_wq_6]
root       567  0.0  0.0      0     0 ?        S    14:59   0:00 [fc_wq_6]
root       568  0.0  0.0      0     0 ?        S    14:59   0:00 [fc_dl_6]
root       583  0.0  0.0      0     0 ?        S    14:59   0:00 [kdmflush]
root       587  0.0  0.0      0     0 ?        S    14:59   0:00 [kdmflush]
root       601  0.0  0.0      0     0 ?        S    14:59   0:00 [kjournald]
root       670  0.0  0.0  16904   916 ?        S    14:59   0:00 upstart-udev-bridge --daemon
root       675  0.0  0.0  17076   916 ?        S<s  14:59   0:00 udevd --daemon
daemon    1041  0.0  0.0   8256   564 ?        Ss   14:59   0:00 portmap
statd     1265  0.0  0.0  10392   832 ?        Ss   14:59   0:00 rpc.statd -L --port 4000 --outgoing-port 4001
root      1309  0.0  0.0      0     0 ?        S    14:59   0:00 [kdmflush]
root      1312  0.0  0.0      0     0 ?        S    14:59   0:00 [kdmflush]
root      1315  0.0  0.0      0     0 ?        S    14:59   0:00 [kdmflush]
root      1335  0.0  0.0      0     0 ?        S    14:59   0:00 [kdmflush]
root      1403  0.0  0.0      0     0 ?        S    14:59   0:00 [jbd2/dm-3-8]
root      1404  0.0  0.0      0     0 ?        S    14:59   0:00 [ext4-dio-unwrit]
root      1405  0.0  0.0      0     0 ?        S    14:59   0:00 [ext4-dio-unwrit]
root      1406  0.0  0.0      0     0 ?        S    14:59   0:00 [ext4-dio-unwrit]
root      1407  0.0  0.0      0     0 ?        S    14:59   0:00 [ext4-dio-unwrit]
root      1408  0.0  0.0      0     0 ?        S    14:59   0:00 [ext4-dio-unwrit]
root      1409  0.0  0.0      0     0 ?        S    14:59   0:00 [ext4-dio-unwrit]
root      1410  0.0  0.0      0     0 ?        S    14:59   0:00 [ext4-dio-unwrit]
root      1411  0.0  0.0      0     0 ?        S    14:59   0:00 [ext4-dio-unwrit]
root      1412  0.0  0.0      0     0 ?        S    14:59   0:00 [ext4-dio-unwrit]
root      1413  0.0  0.0      0     0 ?        S    14:59   0:00 [ext4-dio-unwrit]
root      1414  0.0  0.0      0     0 ?        S    14:59   0:00 [ext4-dio-unwrit]
root      1415  0.0  0.0      0     0 ?        S    14:59   0:00 [ext4-dio-unwrit]
root      1416  0.0  0.0      0     0 ?        S    14:59   0:00 [ext4-dio-unwrit]
root      1417  0.0  0.0      0     0 ?        S    14:59   0:00 [ext4-dio-unwrit]
root      1418  0.0  0.0      0     0 ?        S    14:59   0:00 [ext4-dio-unwrit]
root      1419  0.0  0.0      0     0 ?        S    14:59   0:00 [ext4-dio-unwrit]
root      1420  0.0  0.0      0     0 ?        S    14:59   0:00 [ext4-dio-unwrit]
root      1421  0.0  0.0      0     0 ?        S    14:59   0:00 [ext4-dio-unwrit]
root      1422  0.0  0.0      0     0 ?        S    14:59   0:00 [ext4-dio-unwrit]
root      1423  0.0  0.0      0     0 ?        S    14:59   0:00 [ext4-dio-unwrit]
root      1424  0.0  0.0      0     0 ?        S    14:59   0:00 [ext4-dio-unwrit]
root      1425  0.0  0.0      0     0 ?        S    14:59   0:00 [ext4-dio-unwrit]
root      1426  0.0  0.0      0     0 ?        S    14:59   0:00 [ext4-dio-unwrit]
root      1427  0.0  0.0      0     0 ?        S    14:59   0:00 [ext4-dio-unwrit]
root      1449  0.0  0.0      0     0 ?        S    14:59   0:00 [xfs_mru_cache]
root      1450  0.0  0.0      0     0 ?        S    14:59   0:00 [xfslogd/0]
root      1451  0.0  0.0      0     0 ?        S    14:59   0:00 [xfslogd/1]
root      1452  0.0  0.0      0     0 ?        S    14:59   0:00 [xfslogd/2]
root      1453  0.0  0.0      0     0 ?        S    14:59   0:00 [xfslogd/3]
root      1454  0.0  0.0      0     0 ?        S    14:59   0:00 [xfslogd/4]
root      1455  0.0  0.0      0     0 ?        S    14:59   0:00 [xfslogd/5]
root      1456  0.0  0.0      0     0 ?        S    14:59   0:00 [xfslogd/6]
root      1457  0.0  0.0      0     0 ?        S    14:59   0:00 [xfslogd/7]
root      1458  0.0  0.0      0     0 ?        S    14:59   0:00 [xfslogd/8]
root      1459  0.0  0.0      0     0 ?        S    14:59   0:00 [xfslogd/9]
root      1460  0.0  0.0      0     0 ?        S    14:59   0:00 [xfslogd/10]
root      1461  0.0  0.0      0     0 ?        S    14:59   0:00 [xfslogd/11]
root      1462  0.0  0.0      0     0 ?        S    14:59   0:00 [xfslogd/12]
root      1463  0.0  0.0      0     0 ?        S    14:59   0:00 [xfslogd/13]
root      1464  0.0  0.0      0     0 ?        S    14:59   0:00 [xfslogd/14]
root      1465  0.0  0.0      0     0 ?        S    14:59   0:00 [xfslogd/15]
root      1466  0.0  0.0      0     0 ?        S    14:59   0:00 [xfslogd/16]
root      1468  0.0  0.0      0     0 ?        S    14:59   0:00 [xfslogd/17]
root      1469  0.0  0.0      0     0 ?        S    14:59   0:00 [xfslogd/18]
root      1470  0.0  0.0      0     0 ?        S    14:59   0:00 [xfslogd/19]
root      1471  0.0  0.0      0     0 ?        S    14:59   0:00 [xfslogd/20]
root      1472  0.0  0.0      0     0 ?        S    14:59   0:00 [xfslogd/21]
root      1473  0.0  0.0      0     0 ?        S    14:59   0:00 [xfslogd/22]
root      1474  0.0  0.0      0     0 ?        S    14:59   0:00 [xfslogd/23]
root      1475  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsdatad/0]
root      1476  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsdatad/1]
root      1477  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsdatad/2]
root      1478  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsdatad/3]
root      1479  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsdatad/4]
root      1480  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsdatad/5]
root      1481  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsdatad/6]
root      1482  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsdatad/7]
root      1483  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsdatad/8]
root      1484  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsdatad/9]
root      1485  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsdatad/10]
root      1486  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsdatad/11]
root      1487  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsdatad/12]
root      1488  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsdatad/13]
root      1490  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsdatad/14]
root      1491  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsdatad/15]
root      1492  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsdatad/16]
root      1493  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsdatad/17]
root      1494  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsdatad/18]
root      1495  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsdatad/19]
root      1496  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsdatad/20]
root      1497  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsdatad/21]
root      1498  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsdatad/22]
root      1499  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsdatad/23]
root      1500  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsconvertd/0]
root      1501  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsconvertd/1]
root      1502  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsconvertd/2]
root      1503  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsconvertd/3]
root      1504  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsconvertd/4]
root      1505  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsconvertd/5]
root      1506  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsconvertd/6]
root      1507  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsconvertd/7]
root      1508  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsconvertd/8]
root      1509  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsconvertd/9]
root      1510  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsconvertd/10]
root      1511  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsconvertd/11]
root      1512  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsconvertd/12]
root      1513  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsconvertd/13]
root      1514  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsconvertd/14]
root      1515  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsconvertd/15]
root      1516  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsconvertd/16]
root      1517  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsconvertd/17]
root      1518  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsconvertd/18]
root      1519  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsconvertd/19]
root      1520  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsconvertd/20]
root      1521  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsconvertd/21]
root      1522  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsconvertd/22]
root      1523  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsconvertd/23]
root      1525  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsbufd]
root      1528  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsaild]
root      1558  0.0  0.0      0     0 ?        S    14:59   0:00 [kdmflush]
root      1642  0.0  0.0      0     0 ?        S    14:59   0:00 [kdmflush]
root      1760  0.0  0.0      0     0 ?        S    14:59   0:00 [xfssyncd]
root      1768  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsbufd]
root      1769  0.0  0.0      0     0 ?        S    14:59   0:00 [xfsaild]
root      1770  0.0  0.0      0     0 ?        S    14:59   0:00 [xfssyncd]
syslog    1808  0.0  0.0 211600  3400 ?        Sl   14:59   0:00 rsyslogd -c4
root      1818  0.0  0.0      0     0 ?        S    14:59   0:00 [bond0]
105       1828  0.0  0.0  23424   900 ?        Ss   14:59   0:00 dbus-daemon --system --fork
root      1892  0.0  0.0   6080   660 tty4     Ss+  14:59   0:00 /sbin/getty -8 38400 tty4
root      1896  0.0  0.0   6080   660 tty5     Ss+  14:59   0:00 /sbin/getty -8 38400 tty5
root      1900  0.0  0.0   6080   656 tty2     Ss+  14:59   0:00 /sbin/getty -8 38400 tty2
root      1901  0.0  0.0   6080   660 tty3     Ss+  14:59   0:00 /sbin/getty -8 38400 tty3
root      1905  0.0  0.0   6080   656 tty6     Ss+  14:59   0:00 /sbin/getty -8 38400 tty6
root      1915  0.0  0.0  11284   688 ?        Ss   14:59   0:00 /usr/sbin/irqbalance
root      1917  0.0  0.0  21076  1076 ?        Ss   14:59   0:00 cron
daemon    1918  0.0  0.0  18884   468 ?        Ss   14:59   0:00 atd
root      2064  0.0  0.0      0     0 ?        S    14:59   0:00 [flush-251:0]
root      2927  0.0  0.0  24536  1072 ?        Ss   14:59   0:00 /usr/sbin/ntpd
ntpd      2928  0.0  0.0  20316  1068 ?        S    14:59   0:00 /usr/sbin/ntpd
root      2936  0.0  0.0  49264  2588 ?        Ss   14:59   0:00 /usr/sbin/sshd -D
clamav    3195  0.0  0.0  42804  1860 ?        Ss   15:00   0:00 /usr/bin/freshclam -d --quiet
nobody    3200  0.0  0.0 148744 11780 ?        Sl   15:00   0:00 /usr/bin/memcached -m 4096 -p 11211 -u nobody -l 127.0.0.1
ossec     3244  0.1  0.0  12804   968 ?        S    15:00   0:00 /var/ossec/bin/ossec-agentd
root      3251  0.0  0.0   4244   576 ?        S    15:00   0:00 /var/ossec/bin/ossec-logcollector
root      3267  0.5  0.0   5100  1608 ?        S    15:00   0:03 /var/ossec/bin/ossec-syscheckd
root      3340  0.0  0.0      0     0 ?        S    15:00   0:00 [rpciod/0]
root      3341  0.0  0.0      0     0 ?        S    15:00   0:00 [rpciod/1]
root      3342  0.0  0.0      0     0 ?        S    15:00   0:00 [rpciod/2]
root      3343  0.0  0.0      0     0 ?        S    15:00   0:00 [rpciod/3]
root      3344  0.0  0.0      0     0 ?        S    15:00   0:00 [rpciod/4]
root      3345  0.0  0.0      0     0 ?        S    15:00   0:00 [rpciod/5]
root      3346  0.0  0.0      0     0 ?        S    15:00   0:00 [rpciod/6]
root      3347  0.0  0.0      0     0 ?        S    15:00   0:00 [rpciod/7]
root      3348  0.0  0.0      0     0 ?        S    15:00   0:00 [rpciod/8]
root      3349  0.0  0.0      0     0 ?        S    15:00   0:00 [rpciod/9]
root      3350  0.0  0.0      0     0 ?        S    15:00   0:00 [rpciod/10]
root      3351  0.0  0.0      0     0 ?        S    15:00   0:00 [rpciod/11]
root      3352  0.0  0.0      0     0 ?        S    15:00   0:00 [rpciod/12]
root      3353  0.0  0.0      0     0 ?        S    15:00   0:00 [rpciod/13]
root      3354  0.0  0.0      0     0 ?        S    15:00   0:00 [rpciod/14]
root      3355  0.0  0.0      0     0 ?        S    15:00   0:00 [rpciod/15]
root      3356  0.0  0.0      0     0 ?        S    15:00   0:00 [rpciod/16]
root      3357  0.0  0.0      0     0 ?        S    15:00   0:00 [rpciod/17]
root      3358  0.0  0.0      0     0 ?        S    15:00   0:00 [rpciod/18]
root      3359  0.0  0.0      0     0 ?        S    15:00   0:00 [rpciod/19]
root      3360  0.0  0.0      0     0 ?        S    15:00   0:00 [rpciod/20]
root      3361  0.0  0.0      0     0 ?        S    15:00   0:00 [rpciod/21]
root      3362  0.0  0.0      0     0 ?        S    15:00   0:00 [rpciod/22]
root      3363  0.0  0.0      0     0 ?        S    15:00   0:00 [rpciod/23]
root      3364  0.0  0.0      0     0 ?        S    15:00   0:00 [nfsiod]
root      3365  0.0  0.0      0     0 ?        S    15:00   0:00 [lockd]
---
root      6334  0.0  0.0      0     0 ?        S    15:07   0:00 [flush-251:4]
root      6349  0.0  0.0      0     0 ?        S    15:07   0:00 [flush-0:21]
root      6350  0.0  0.0  85528  3680 pts/1    SLl+ 15:07   0:00 /sbin/multipathd -d -v 255
root      6352  0.0  0.0   4340   632 pts/1    S+   15:07   0:00 strace -o /home/user/strace_mpathd.txt -D /sbin/multipathd -d -v 255
postfix   8511  0.0  0.0  39376  2388 ?        S    15:10   0:00 cleanup -z -t unix -u -c
postfix   8512  0.0  0.0  39288  2260 ?        S    15:10   0:00 trivial-rewrite -n rewrite -t unix -u -c
postfix   8513  0.0  0.0  43568  2632 ?        S    15:10   0:00 smtp -t unix -u -c
postfix   8516  0.0  0.0  39548  2964 ?        S    15:10   0:00 local -t unix
root      8613  0.0  0.0  16868   760 ?        S<   15:10   0:00 udevd --daemon
root      8695  0.0  0.0  16868   760 ?        S<   15:10   0:00 udevd --daemon
root      8874  0.0  0.0      0     0 ?        S    15:10   0:00 [flush-8:128]
root      8875  0.0  0.0      0     0 ?        S    15:10   0:00 [flush-8:144]
root      8876  0.0  0.0      0     0 ?        S    15:10   0:00 [flush-8:224]
root      8877  0.0  0.0      0     0 ?        S    15:10   0:00 [flush-8:240]
root      8878  0.0  0.0      0     0 ?        S    15:10   0:00 [flush-8:112]
root      8879  0.0  0.0      0     0 ?        S    15:10   0:00 [flush-8:208]

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to multipath-tools in Ubuntu.
https://bugs.launchpad.net/bugs/1020436

Title:
  Cannot read superblock after FC multipath failover

Status in “multipath-tools” package in Ubuntu:
  Incomplete

Bug description:
  This might not be multipath-tools, but it's the likeliest candidate.

  If fibre channel connectivity is disrupted on an active path, I can
  see the multipath daemon rejuggling active paths as expected.  However
  instead of utilising a new path, the server continues trying active
  i/o down the same path until it fails, and the superblock on the lun
  is marked unreadable.

  The luns simply cannot be remounted even after the paths are
  recovered.  However, after a simple reboot, the luns are again
  readable _regardless_ of the visible path.  (Eg I shut the active FC
  port then rebooted, and the storage was mountable per normal over a
  different path).

  I've replicated this behaviour using both xfs and ext4 filesystems, on
  multiple different luns presented to the server.

  The luns are visible over four FC paths, and the /dev/mapper/mpathX
  identity is used as the physical volume for an LVM2 volume group, into
  which the logical volume(s) and filesystem are created.

  root@<host>:~# lsb_release -rd
  Description:	Ubuntu 10.04.3 LTS
  Release:	10.04

  As you can see here, the /dev/test and /dev/test2 volume groups are
  both active, yet showing i/o errors after a pathing fail.

  root@<host>:~# lvscan
    /dev/test2/lvol0: read failed after 0 of 4096 at 0: Input/output error
    /dev/test/lvol0: read failed after 0 of 4096 at 0: Input/output error
    ACTIVE            '/dev/test2/lvol0' [4.00 GiB] inherit
    ACTIVE            '/dev/test/lvol0' [4.00 GiB] inherit
    ACTIVE            '/dev/mvsan/san' [500.00 GiB] inherit

  root@<host>:~# pvscan
    /dev/test2/lvol0: read failed after 0 of 4096 at 4290707456: Input/output error
    /dev/test2/lvol0: read failed after 0 of 4096 at 4290764800: Input/output error
    /dev/test2/lvol0: read failed after 0 of 4096 at 0: Input/output error
    /dev/test2/lvol0: read failed after 0 of 4096 at 4096: Input/output error
    /dev/test2/lvol0: read failed after 0 of 4096 at 0: Input/output error
    /dev/test/lvol0: read failed after 0 of 4096 at 4290707456: Input/output error
    /dev/test/lvol0: read failed after 0 of 4096 at 4290764800: Input/output error
    /dev/test/lvol0: read failed after 0 of 4096 at 0: Input/output error
    /dev/test/lvol0: read failed after 0 of 4096 at 4096: Input/output error
    /dev/test/lvol0: read failed after 0 of 4096 at 0: Input/output error
    PV /dev/mapper/mpath2   VG test2            lvm2 [4.00 GiB / 0    free]
    PV /dev/mapper/mpath1   VG test             lvm2 [4.00 GiB / 0    free]
    PV /dev/mapper/mpath0   VG mvsan            lvm2 [500.00 GiB / 0    free]

  root@<host>:~# multipath -ll
  mpath2 (360060e80058a070000008a0700000023) dm-7 HITACHI ,OPEN-V
  [size=4.0G][features=1 queue_if_no_path][hwhandler=0]
  \_ round-robin 0 [prio=4][active]
   \_ 6:0:0:2 sdd 8:48  [active][ready]
   \_ 6:0:1:2 sdg 8:96  [active][ready]
   \_ 7:0:0:2 sdj 8:144 [active][ready]
   \_ 7:0:1:2 sdp 8:240 [active][ready]
  mpath1 (360060e80058a070000008a070000000e) dm-6 HITACHI ,OPEN-V
  [size=4.0G][features=1 queue_if_no_path][hwhandler=0]
  \_ round-robin 0 [prio=4][active]
   \_ 6:0:0:1 sdc 8:32  [active][ready]
   \_ 6:0:1:1 sdf 8:80  [active][ready]
   \_ 7:0:0:1 sdi 8:128 [active][ready]
   \_ 7:0:1:1 sdo 8:224 [active][ready]
  mpath0 (360060e80058a070000008a0700002417) dm-5 HITACHI ,OPEN-V
  [size=500G][features=1 queue_if_no_path][hwhandler=0]
  \_ round-robin 0 [prio=4][active]
   \_ 6:0:0:0 sdb 8:16  [active][ready]
   \_ 6:0:1:0 sde 8:64  [active][ready]
   \_ 7:0:0:0 sdh 8:112 [active][ready]
   \_ 7:0:1:0 sdk 8:160 [active][ready]

  The dmesg output is very instructive, but still doesn't help with the
  root cause per se.  I set the scsi-timeouts nice and high (90 seconds)
  to accommodate any potential delays in path failover.  The path checks
  (test unit ready/TUR) occur about every 20 seconds.

  See below:

  [ 2192.891962] qla2xxx 0000:24:00.0: LOOP DOWN detected (2 3 0).
  [ 2222.820850]  rport-7:0-0: blocked FC remote port time out: removing target and saving binding
  [ 2222.821297]  rport-7:0-1: blocked FC remote port time out: removing target and saving binding
  [ 2222.827286] device-mapper: multipath: Failing path 8:112.
  [ 2222.827369] device-mapper: multipath: Failing path 8:160.

  So this is all as expected.

  Then:

  [ 2222.924665] sd 7:0:0:0: [sdh] Synchronizing SCSI cache
  [ 2222.924696] sd 7:0:0:0: [sdh] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
  [ 2222.926071] device-mapper: multipath: Failing path 8:160.
  [ 2222.976444] sd 7:0:1:2: [sdm] Unhandled error code
  [ 2222.976446] sd 7:0:1:2: [sdm] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
  [ 2222.976449] sd 7:0:1:2: [sdm] CDB: Read(10): 28 00 00 7f e1 00 00 00 01 00
  [ 2222.976455] end_request: I/O error, dev sdm, sector 8380672
  [ 2222.980258] sd 7:0:1:2: [sdm] Unhandled error code
  [ 2222.980260] sd 7:0:1:2: [sdm] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
  [ 2222.980262] sd 7:0:1:2: [sdm] CDB: Read(10): 28 00 00 7f e1 70 00 00 01 00
  [ 2222.980267] end_request: I/O error, dev sdm, sector 8380784
  [ 2222.984139] sd 7:0:1:2: [sdm] Unhandled error code
  [ 2222.984141] sd 7:0:1:2: [sdm] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
  [ 2222.984142] sd 7:0:1:2: [sdm] CDB: Read(10): 28 00 00 00 01 80 00 00 01 00
  [ 2222.984147] end_request: I/O error, dev sdm, sector 384
  [ 2222.988137] sd 7:0:1:2: [sdm] Unhandled error code
  [ 2222.988139] sd 7:0:1:2: [sdm] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
  [ 2222.988141] sd 7:0:1:2: [sdm] CDB: Read(10): 28 00 00 00 01 88 00 00 01 00
  [ 2222.988145] end_request: I/O error, dev sdm, sector 392
  [ 2222.992274] sd 7:0:1:2: [sdm] Unhandled error code
  [ 2222.992276] sd 7:0:1:2: [sdm] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
  [ 2222.992278] sd 7:0:1:2: [sdm] CDB: Read(10): 28 00 00 00 01 80 00 00 04 00
  [ 2222.992282] end_request: I/O error, dev sdm, sector 384
  [ 2222.996583] sd 7:0:1:1: [sdl] Unhandled error code
  [ 2222.996585] sd 7:0:1:1: [sdl] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
  [ 2222.996587] sd 7:0:1:1: [sdl] CDB: Read(10): 28 00 00 7f e1 00 00 00 08 00
  [ 2222.996592] end_request: I/O error, dev sdl, sector 8380672
  [ 2223.000980] sd 7:0:1:1: [sdl] Unhandled error code
  [ 2223.000983] sd 7:0:1:1: [sdl] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
  [ 2223.000985] sd 7:0:1:1: [sdl] CDB: Read(10): 28 00 00 7f e1 70 00 00 08 00
  [ 2223.000992] end_request: I/O error, dev sdl, sector 8380784
  [ 2223.005571] sd 7:0:1:1: [sdl] Unhandled error code
  [ 2223.005573] sd 7:0:1:1: [sdl] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
  [ 2223.005576] sd 7:0:1:1: [sdl] CDB: Read(10): 28 00 00 00 01 80 00 00 08 00
  [ 2223.005583] end_request: I/O error, dev sdl, sector 384
  [ 2223.010258] sd 7:0:1:1: [sdl] Unhandled error code
  [ 2223.010260] sd 7:0:1:1: [sdl] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
  [ 2223.010263] sd 7:0:1:1: [sdl] CDB: Read(10): 28 00 00 00 01 88 00 00 08 00
  [ 2223.010269] end_request: I/O error, dev sdl, sector 392
  [ 2223.015062] sd 7:0:1:1: [sdl] Unhandled error code
  [ 2223.015065] sd 7:0:1:1: [sdl] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
  [ 2223.015068] sd 7:0:1:1: [sdl] CDB: Read(10): 28 00 00 00 01 80 00 00 08 00
  [ 2223.015072] end_request: I/O error, dev sdl, sector 384
  [ 2223.046324] sd 7:0:0:2: [sdj] Unhandled error code
  [ 2223.046325] sd 7:0:0:2: [sdj] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
  [ 2223.046328] sd 7:0:0:2: [sdj] CDB: Read(10): 28 00 00 7f ff 80 00 00 08 00
  [ 2223.046333] end_request: I/O error, dev sdj, sector 8388480
  [ 2223.051339] sd 7:0:0:2: [sdj] Unhandled error code
  [ 2223.051341] sd 7:0:0:2: [sdj] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
  [ 2223.051343] sd 7:0:0:2: [sdj] CDB: Read(10): 28 00 00 7f ff f0 00 00 08 00
  [ 2223.051347] end_request: I/O error, dev sdj, sector 8388592
  [ 2223.051841] sd 7:0:0:1: [sdi] Synchronizing SCSI cache
  [ 2223.051868] sd 7:0:0:1: [sdi] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
  [ 2223.056574] sd 7:0:1:0: [sdk] Unhandled error code
  [ 2223.056576] sd 7:0:1:0: [sdk] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
  [ 2223.056578] sd 7:0:1:0: [sdk] CDB: Read(10): 28 00 3e 7f ff 80 00 00 08 00
  [ 2223.056583] end_request: I/O error, dev sdk, sector 1048575872
  [ 2223.061961] sd 7:0:1:0: [sdk] Unhandled error code
  [ 2223.061962] sd 7:0:1:0: [sdk] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
  [ 2223.061964] sd 7:0:1:0: [sdk] CDB: Read(10): 28 00 3e 7f ff f0 00 00 08 00
  [ 2223.061969] end_request: I/O error, dev sdk, sector 1048575984
  [ 2223.067450] sd 7:0:1:0: [sdk] Unhandled error code
  [ 2223.067453] sd 7:0:1:0: [sdk] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
  [ 2223.067456] sd 7:0:1:0: [sdk] CDB: Read(10): 28 00 00 00 00 00 00 00 08 00
  [ 2223.067462] end_request: I/O error, dev sdk, sector 0
  [ 2223.073081] sd 7:0:1:0: [sdk] Unhandled error code
  [ 2223.073083] sd 7:0:1:0: [sdk] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
  [ 2223.073085] sd 7:0:1:0: [sdk] CDB: Read(10): 28 00 00 00 00 08 00 00 08 00
  [ 2223.073089] end_request: I/O error, dev sdk, sector 8
  [ 2223.078824] sd 7:0:1:0: [sdk] Unhandled error code
  [ 2223.078825] sd 7:0:1:0: [sdk] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
  [ 2223.078827] sd 7:0:1:0: [sdk] CDB: Read(10): 28 00 00 00 00 00 00 00 08 00
  [ 2223.078832] end_request: I/O error, dev sdk, sector 0
  [ 2223.084675] sd 7:0:1:1: [sdl] Unhandled error code
  [ 2223.084677] sd 7:0:1:1: [sdl] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
  [ 2223.084679] sd 7:0:1:1: [sdl] CDB: Read(10): 28 00 00 7f ff 80 00 00 08 00
  [ 2223.084683] end_request: I/O error, dev sdl, sector 8388480
  [ 2223.090671] sd 7:0:1:1: [sdl] Unhandled error code
  [ 2223.090672] sd 7:0:1:1: [sdl] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
  [ 2223.090674] sd 7:0:1:1: [sdl] CDB: Read(10): 28 00 00 7f ff f0 00 00 08 00
  [ 2223.090679] end_request: I/O error, dev sdl, sector 8388592
  [ 2223.096830] sd 7:0:1:1: [sdl] Unhandled error code
  [ 2223.096832] sd 7:0:1:1: [sdl] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
  [ 2223.096834] sd 7:0:1:1: [sdl] CDB: Read(10): 28 00 00 00 00 00 00 00 08 00
  [ 2223.096838] end_request: I/O error, dev sdl, sector 0
  [ 2223.103075] sd 7:0:1:1: [sdl] Unhandled error code
  [ 2223.103077] sd 7:0:1:1: [sdl] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
  [ 2223.103079] sd 7:0:1:1: [sdl] CDB: Read(10): 28 00 00 00 00 08 00 00 08 00
  [ 2223.103083] end_request: I/O error, dev sdl, sector 8
  [ 2223.109441] sd 7:0:1:1: [sdl] Unhandled error code
  [ 2223.109444] sd 7:0:1:1: [sdl] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
  [ 2223.109446] sd 7:0:1:1: [sdl] CDB: Read(10): 28 00 00 00 00 00 00 00 08 00
  [ 2223.109453] end_request: I/O error, dev sdl, sector 0
  [ 2223.115922] sd 7:0:1:2: [sdm] Unhandled error code
  [ 2223.115924] sd 7:0:1:2: [sdm] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
  [ 2223.115926] sd 7:0:1:2: [sdm] CDB: Read(10): 28 00 00 7f ff 80 00 00 08 00
  [ 2223.115930] end_request: I/O error, dev sdm, sector 8388480
  [ 2223.122543] sd 7:0:1:2: [sdm] Unhandled error code
  [ 2223.122545] sd 7:0:1:2: [sdm] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
  [ 2223.122547] sd 7:0:1:2: [sdm] CDB: Read(10): 28 00 00 7f ff f0 00 00 08 00
  [ 2223.122551] end_request: I/O error, dev sdm, sector 8388592
  [ 2223.128957] sd 7:0:1:2: [sdm] Unhandled error code
  [ 2223.128959] sd 7:0:1:2: [sdm] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
  [ 2223.128961] sd 7:0:1:2: [sdm] CDB: Read(10): 28 00 00 00 00 00 00 00 08 00
  [ 2223.128965] end_request: I/O error, dev sdm, sector 0
  [ 2223.135176] sd 7:0:1:2: [sdm] Unhandled error code
  [ 2223.135178] sd 7:0:1:2: [sdm] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
  [ 2223.135180] sd 7:0:1:2: [sdm] CDB: Read(10): 28 00 00 00 00 08 00 00 08 00
  [ 2223.135185] end_request: I/O error, dev sdm, sector 8
  [ 2223.140962] sd 7:0:1:2: [sdm] Unhandled error code
  [ 2223.140964] sd 7:0:1:2: [sdm] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
  [ 2223.140965] sd 7:0:1:2: [sdm] CDB: Read(10): 28 00 00 00 00 00 00 00 08 00
  [ 2223.140970] end_request: I/O error, dev sdm, sector 0
  [ 2223.164023] sd 7:0:0:2: [sdj] Synchronizing SCSI cache
  [ 2223.164050] sd 7:0:0:2: [sdj] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
  [ 2223.178664] sd 7:0:1:2: [sdm] Unhandled error code
  [ 2223.178666] sd 7:0:1:2: [sdm] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
  [ 2223.178668] sd 7:0:1:2: [sdm] CDB: Read(10): 28 00 00 00 01 80 00 00 04 00
  [ 2223.178673] end_request: I/O error, dev sdm, sector 384
  [ 2223.183803] sd 7:0:1:1: [sdl] Unhandled error code
  [ 2223.183805] sd 7:0:1:1: [sdl] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
  [ 2223.183807] sd 7:0:1:1: [sdl] CDB: Read(10): 28 00 00 00 01 80 00 00 08 00
  [ 2223.183812] end_request: I/O error, dev sdl, sector 384
  [ 2223.191271] sd 7:0:1:1: [sdl] Unhandled error code
  [ 2223.191273] sd 7:0:1:1: [sdl] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
  [ 2223.191275] sd 7:0:1:1: [sdl] CDB: Read(10): 28 00 00 00 00 00 00 00 08 00
  [ 2223.191280] end_request: I/O error, dev sdl, sector 0
  [ 2223.195433] sd 7:0:1:2: [sdm] Unhandled error code
  [ 2223.195435] sd 7:0:1:2: [sdm] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
  [ 2223.195438] sd 7:0:1:2: [sdm] CDB: Read(10): 28 00 00 00 00 00 00 00 08 00
  [ 2223.195444] end_request: I/O error, dev sdm, sector 0
  [ 2223.236558] sd 7:0:1:2: [sdm] Unhandled error code
  [ 2223.236560] sd 7:0:1:2: [sdm] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
  [ 2223.236563] sd 7:0:1:2: [sdm] CDB: Read(10): 28 00 00 7f e1 00 00 00 01 00
  [ 2223.236568] end_request: I/O error, dev sdm, sector 8380672
  [ 2223.240754] sd 7:0:1:2: [sdm] Unhandled error code
  [ 2223.240756] sd 7:0:1:2: [sdm] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
  [ 2223.240758] sd 7:0:1:2: [sdm] CDB: Read(10): 28 00 00 7f e1 70 00 00 01 00
  [ 2223.240763] end_request: I/O error, dev sdm, sector 8380784
  [ 2223.241440] sd 7:0:1:0: [sdk] Synchronizing SCSI cache
  [ 2223.241531] sd 7:0:1:0: [sdk] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
  [ 2223.244982] sd 7:0:1:2: [sdm] Unhandled error code
  [ 2223.244984] sd 7:0:1:2: [sdm] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
  [ 2223.244986] sd 7:0:1:2: [sdm] CDB: Read(10): 28 00 00 00 01 80 00 00 01 00
  [ 2223.244991] end_request: I/O error, dev sdm, sector 384
  [ 2223.249170] sd 7:0:1:2: [sdm] Unhandled error code
  [ 2223.249173] sd 7:0:1:2: [sdm] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
  [ 2223.249176] sd 7:0:1:2: [sdm] CDB: Read(10): 28 00 00 00 01 88 00 00 01 00
  [ 2223.249183] end_request: I/O error, dev sdm, sector 392
  [ 2223.253313] sd 7:0:1:2: [sdm] Unhandled error code
  [ 2223.253315] sd 7:0:1:2: [sdm] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
  [ 2223.253318] sd 7:0:1:2: [sdm] CDB: Read(10): 28 00 00 00 01 80 00 00 04 00
  [ 2223.253325] end_request: I/O error, dev sdm, sector 384
  [ 2223.270352] sd 7:0:1:2: [sdm] Unhandled error code
  [ 2223.270355] sd 7:0:1:2: [sdm] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
  [ 2223.270359] sd 7:0:1:2: [sdm] CDB: Read(10): 28 00 00 7f ff 80 00 00 08 00
  [ 2223.270366] end_request: I/O error, dev sdm, sector 8388480
  [ 2223.274548] sd 7:0:1:2: [sdm] Unhandled error code
  [ 2223.274550] sd 7:0:1:2: [sdm] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
  [ 2223.274552] sd 7:0:1:2: [sdm] CDB: Read(10): 28 00 00 7f ff f0 00 00 08 00
  [ 2223.274557] end_request: I/O error, dev sdm, sector 8388592
  [ 2223.278653] sd 7:0:1:2: [sdm] Unhandled error code
  [ 2223.278654] sd 7:0:1:2: [sdm] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
  [ 2223.278656] sd 7:0:1:2: [sdm] CDB: Read(10): 28 00 00 00 00 00 00 00 08 00
  [ 2223.278661] end_request: I/O error, dev sdm, sector 0
  [ 2223.282759] sd 7:0:1:2: [sdm] Unhandled error code
  [ 2223.282760] sd 7:0:1:2: [sdm] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
  [ 2223.282762] sd 7:0:1:2: [sdm] CDB: Read(10): 28 00 00 00 00 08 00 00 08 00
  [ 2223.282767] end_request: I/O error, dev sdm, sector 8
  [ 2223.286863] sd 7:0:1:2: [sdm] Unhandled error code
  [ 2223.286865] sd 7:0:1:2: [sdm] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
  [ 2223.286867] sd 7:0:1:2: [sdm] CDB: Read(10): 28 00 00 00 00 00 00 00 08 00
  [ 2223.286872] end_request: I/O error, dev sdm, sector 0
  [ 2223.321219] sd 7:0:1:2: [sdm] Unhandled error code
  [ 2223.321221] sd 7:0:1:2: [sdm] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
  [ 2223.321223] sd 7:0:1:2: [sdm] CDB: Read(10): 28 00 00 00 01 80 00 00 04 00
  [ 2223.321229] end_request: I/O error, dev sdm, sector 384
  [ 2223.321231] sd 7:0:1:1: [sdl] Synchronizing SCSI cache
  [ 2223.321261] sd 7:0:1:1: [sdl] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
  [ 2223.443319] sd 7:0:1:2: [sdm] Synchronizing SCSI cache
  [ 2223.443351] sd 7:0:1:2: [sdm] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK

  And then:

  [ 2241.094148] Aborting journal on device dm-3-8.
  [ 2241.098327] __ratelimit: 24 callbacks suppressed
  [ 2241.098330] Buffer I/O error on device dm-3, logical block 458752
  [ 2241.102730] lost page write due to I/O error on dm-3
  [ 2241.102743] JBD2: I/O error detected when updating journal superblock for dm-3-8.
  [ 2265.843946] EXT4-fs error (device dm-3): ext4_journal_start_sb: Detected aborted journal
  [ 2265.855469] EXT4-fs (dm-3): Remounting filesystem read-only
  [ 2280.676139] I/O error in filesystem ("dm-2") meta-data dev dm-2 block 0x18       ("xfs_trans_read_buf") error 5 buf count 4096

  This is very disturbing as it means that the multipathing is not in
  fact working at all - You can see that the I/O errors are pointing at
  'dm-3' rather than the mpath associated device, but thats normal as
  the logical volume appears in that place.

  The filesystems are healthy, when you reboot the server and check them
  there are zero errors.  There's something wrong with the way that the
  pathing failover is being handled, but I'm not sure where I'd find the
  ultimate root cause of this.

  This segfault occurs after the above issues have already manifested:

  [ 4057.146508] multipathd[3261]: segfault at a ip 00007f89bdce798a sp
  00007fffd25c2780 error 4 in libc-2.11.1.so[7f89bdc70000+17a000].

  root@<host>:~# apt-cache policy multipath-tools
  multipath-tools:
    Installed: 0.4.8-14ubuntu4.10.04.2
    Candidate: 0.4.8-14ubuntu4.10.04.2
    Version table:
   *** 0.4.8-14ubuntu4.10.04.2 0
          500 http://au.archive.ubuntu.com/ubuntu/ lucid-updates/main Packages
          100 /var/lib/dpkg/status
       0.4.8-14ubuntu4 0
          500 http://au.archive.ubuntu.com/ubuntu/ lucid/main Packages

  Let me know if you need further details.

  ProblemType: Bug
  DistroRelease: Ubuntu 10.04
  Package: multipath-tools 0.4.8-14ubuntu4.10.04.2
  ProcVersionSignature: Ubuntu 2.6.32-41.91-server 2.6.32.59+drm33.24
  Uname: Linux 2.6.32-41-server x86_64
  Architecture: amd64
  Date: Tue Jul  3 15:13:23 2012
  InstallationMedia: Ubuntu-Server 10.04.3 LTS "Lucid Lynx" - Release amd64 (20110719.2)
  ProcEnviron:
   LANG=en_AU.UTF8
   SHELL=/bin/bash
  SourcePackage: multipath-tools

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