[Bug 351089] [NEW] kswapd Bad page state in process

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Hello all,

I think the bug I'm facing now is a regression of an older bug.
Short summary and system description:
Ubuntu 32bit 8.10, 4gb Ram, linux-server kernel image 2.6.27.11 (because of PAE support to see all RAM).
Partitions are like this:
3aware hardware RAID card -  2 x HDD 1 TB (RAID-1 hardware); LVM on top of this for snapshot functionality
Partitions:
/boot
LVM:
/ - reiserfs
/home - xfs
/storage - xfs
swap

What I was doing when I noticed the bug:
- copying files from the older hard-drives to the new setup

Output you will find in the attached logs (from dmesg).

[ 8245.217063] Bad page state in process 'kswapd0'
[ 8245.217064] page:c12df294 flags:0x40000008 mapping:00000000 mapcount:-67108864 count:0
[ 8245.217072] Trying to fix it up, but a reboot is needed
[ 8245.217074] Backtrace:
[ 8245.217078] Pid: 199, comm: kswapd0 Tainted: P    B     2.6.27-11-server #1
[ 8245.217082]  [<c038aff6>] ? printk+0x1d/0x1f
[ 8245.217091]  [<c019140c>] bad_page+0x7c/0xd0
[ 8245.217096]  [<c01924c1>] free_hot_cold_page+0x1f1/0x200
[ 8245.217101]  [<c01924fd>] __pagevec_free+0x2d/0x40
[ 8245.217105]  [<c0197488>] shrink_page_list+0x308/0x450
[ 8245.217111]  [<c0197753>] shrink_inactive_list+0x183/0x410
[ 8245.217135]  [<c0132dbf>] ? wake_up_process+0xf/0x20
[ 8245.217143]  [<f905cefa>] ? xfsbufd_wakeup+0x5a/0x60 [xfs]
[ 8245.217168]  [<c0153588>] ? up_read+0x8/0x20
[ 8245.217174]  [<c0197a4a>] shrink_zone+0x6a/0x130
[ 8245.217178]  [<c019835e>] balance_pgdat+0x3ae/0x3d0
[ 8245.217183]  [<c0197000>] ? isolate_pages_global+0x0/0x60
[ 8245.217189]  [<c014f106>] ? finish_wait+0x16/0x70
[ 8245.217194]  [<c0198449>] kswapd+0xc9/0x120
[ 8245.217198]  [<c014f040>] ? autoremove_wake_function+0x0/0x50
[ 8245.217203]  [<c0198380>] ? kswapd+0x0/0x120
[ 8245.217208]  [<c014ecc1>] kthread+0x41/0x80
[ 8245.217212]  [<c014ec80>] ? kthread+0x0/0x80
[ 8245.217217]  [<c010abe7>] kernel_thread_helper+0x7/0x10
[ 8245.217222]  =======================

Basically this is what appears and I think it relates to XFS.

I would be grateful if you guys could take a look and help.

Thanks,
Mihai

** Affects: linux-meta (Ubuntu)
     Importance: Undecided
         Status: New

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kswapd Bad page state in process
https://bugs.launchpad.net/bugs/351089
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