[Bug 663987] [NEW] BUG: soft lockup - CPU#x stuck for 61s!

[Ebbex]

Public bug reported:

Binary package hint: linux-image-2.6.32-25-generic

Ok, so this is probably my own fault. But it says BUG, so I'll report it
anyway.

[12276.094371] BUG: soft lockup - CPU#7 stuck for 61s! [udevd:17459]
[12276.094376] Modules linked in: scsi_dh_emc fbcon tileblit font bitblit softcursor vga16fb vgastate joydev usbhid usb_storage radeon hid ttm drm_kms_helper i5000_edac drm i2c_algo_bit dell_wmi dcdbas edac_core i5k_amb psmouse ioatdma serio_raw dca bnx2 shpchp lp parport ses enclosure qla2xxx scsi_transport_fc megaraid_sas scsi_tgt
[12276.094376] CPU 7:
[12276.094376] Modules linked in: scsi_dh_emc fbcon tileblit font bitblit softcursor vga16fb vgastate joydev usbhid usb_storage radeon hid ttm drm_kms_helper i5000_edac drm i2c_algo_bit dell_wmi dcdbas edac_core i5k_amb psmouse ioatdma serio_raw dca bnx2 shpchp lp parport ses enclosure qla2xxx scsi_transport_fc megaraid_sas scsi_tgt
[12276.094376] Pid: 17459, comm: udevd Tainted: G      D    2.6.32-25-generic #45-Ubuntu PowerEdge 1950
[12276.094376] RIP: 0010:[<ffffffff81038734>]  [<ffffffff81038734>] __ticket_spin_lock+0x14/0x20
[12276.094376] RSP: 0018:ffff8801294c1ca0  EFLAGS: 00000293
[12276.094376] RAX: 000000000000fbf8 RBX: ffff8801294c1ca0 RCX: ffff88006189f0c0
[12276.094376] RDX: ffff88006189f0c0 RSI: ffff88006189f0c0 RDI: ffffffff817b45c0
[12276.094376] RBP: ffffffff81012cae R08: 0000000000000000 R09: ffff880129f60300
[12276.094376] R10: ffff88012b512600 R11: 0000000000000002 R12: ffff8801294c1d08
[12276.094376] R13: 0000000000000004 R14: 00000004811583ff R15: ffff880037709005
[12276.094376] FS:  00007f0bd7f397a0(0000) GS:ffff8800283c0000(0000) knlGS:0000000000000000
[12276.094376] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[12276.094376] CR2: 00007f0bd7f591e2 CR3: 00000001267a4000 CR4: 00000000000006e0
[12276.094376] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[12276.094376] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[12276.094376] Call Trace:
[12276.094376]  [<ffffffff81543a82>] ? lock_kernel+0x22/0x40
[12276.094376]  [<ffffffff81327824>] ? memory_open+0x24/0xa0
[12276.094376]  [<ffffffff81146d1a>] ? chrdev_open+0x13a/0x240
[12276.094376]  [<ffffffff8115ec70>] ? mntput_no_expire+0x30/0x110
[12276.094376]  [<ffffffff81146be0>] ? chrdev_open+0x0/0x240
[12276.094376]  [<ffffffff81141023>] ? __dentry_open+0x113/0x370
[12276.094376]  [<ffffffff8125323f>] ? security_inode_permission+0x1f/0x30
[12276.094376]  [<ffffffff8114d3bf>] ? inode_permission+0xaf/0xd0
[12276.094376]  [<ffffffff81141397>] ? nameidata_to_filp+0x57/0x70
[12276.094376]  [<ffffffff811515fa>] ? do_filp_open+0x2da/0xba0
[12276.094376]  [<ffffffff81543cf5>] ? page_fault+0x25/0x30
[12276.094376]  [<ffffffff812bd4eb>] ? strncpy_from_user+0x5b/0x90
[12276.094376]  [<ffffffff8115d17a>] ? alloc_fd+0x10a/0x150
[12276.094376]  [<ffffffff81140d99>] ? do_sys_open+0x69/0x170
[12276.094376]  [<ffffffff81140ee0>] ? sys_open+0x20/0x30
[12276.094376]  [<ffffffff810121b2>] ? system_call_fastpath+0x16/0x1b

Hardware: Dell PowerEdge 1950 with 2 x QLogic ISP2432 Fibre Channel HBA, EMC CLARiiON AX150.
Software: multipath-tools, qla-tools

root at quimby:/# ql-dynamic-tgt-lun-disc --scan --refresh
ERROR: SG3 Utility not found
Unable to determine devices to be refreshed.
Would you like to explicitly remove all the devices and rescan ? 
Note: This may make the system un-usable if the system is using
any of the devices attached to the QLogic HBAs
Proceed? (yes/no): yes
Scanning HOST: host3
Scanning HOST: host4

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

-- 
BUG: soft lockup - CPU#x stuck for 61s!
https://bugs.launchpad.net/bugs/663987
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