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    SubjectRe: kernel BUG at kernel/workqueue.c:291
    On Mon, 02 Mar 2009 11:51:48 +0100 Carsten Aulbert <carsten.aulbert@aei.mpg.de> wrote:

    > Hi again,
    >
    > in the mean time 43 of our nodes were struck with this error. It seems
    > that the jobs of a certain user can trigger this bug, however I have no
    > clue how to really trigger it manually.

    That's a lot of nodes.

    > My questions:
    > Is this a know bug for 2.6.27.14 (we can upgrade to .19 if necessary),
    > but as this file was not modyfied recently, I suspect there is no ready
    > fix for that.
    >
    > Do you need any more info of our systems (Intel X3220 based Supermirco
    > systems), the kernel config (deadline scheduler in use,...) or something
    > else?

    Let's cc the NFS developers, see if this rpciod crash is familiar to them?

    > Carsten Aulbert schrieb:
    > > [228704.928037] ------------[ cut here ]------------
    > > [228704.928224] kernel BUG at kernel/workqueue.c:291!
    > > [228704.928404] invalid opcode: 0000 [1] SMP
    > > [228704.928647] CPU 0
    > > [228704.928852] Modules linked in: lm92 w83793 w83781d hwmon_vid hwmon nfs nfsd lockd nfs_acl auth_rpcgss sunrpc exportfs autofs4 netconsole configfs ipmi_si ipmi_devintf ipmi_watchdog ipmi_poweroff ipmi_msghandler e1000e i2c_i801 8250_pnp 8250 serial_core i2c_core
    > > [228704.930002] Pid: 1609, comm: rpciod/0 Not tainted 2.6.27.14-nodes #1
    > > [228704.930002] RIP: 0010:[<ffffffff8023c6db>] [<ffffffff8023c6db>] run_workqueue+0x6f/0x102
    > > [228704.930002] RSP: 0018:ffff880214bcdec0 EFLAGS: 00010207
    > > [228704.930002] RAX: 0000000000000000 RBX: ffff880214b82f40 RCX: ffff880215444418
    > > [228704.930002] RDX: ffff880187d07d58 RSI: ffff880214bcdee0 RDI: ffff880215444410
    > > [228704.930002] RBP: ffffffffa0077186 R08: ffff880214bcc000 R09: ffff88021491f808
    > > [228704.930002] R10: 0000000000000246 R11: ffff880187d07d50 R12: ffff880214ad7d28
    > > [228704.930002] R13: ffffffff806065a0 R14: ffffffff80607280 R15: 0000000000000000
    > > [228704.930002] FS: 0000000000000000(0000) GS:ffffffff80636040(0000) knlGS:0000000000000000
    > > [228704.930002] CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b
    > > [228704.930002] CR2: 00007fc056333fd8 CR3: 00000001ed270000 CR4: 00000000000006e0
    > > [228704.930002] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
    > > [228704.930002] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
    > > [228704.930002] Process rpciod/0 (pid: 1609, threadinfo ffff880214bcc000, task ffff880217b08780)
    > > [228704.930002] Stack: ffff880214b82f40 ffff880214b82f40 ffff880214b82f58 ffffffff8023cff3
    > > [228704.930002] 0000000000000000 ffff880217b08780 ffffffff8023f7d7 ffff880214bcdef8
    > > [228704.930002] ffff880214bcdef8 ffffffff806065a0 ffffffff80607280 ffff880214b82f40
    > > [228704.930002] Call Trace:
    > > [228704.930002] [<ffffffff8023cff3>] ? worker_thread+0x90/0x9b
    > > [228704.930002] [<ffffffff8023f7d7>] ? autoremove_wake_function+0x0/0x2e
    > > [228704.930002] [<ffffffff8023cf63>] ? worker_thread+0x0/0x9b
    > > [228704.930002] [<ffffffff8023f6c2>] ? kthread+0x47/0x75
    > > [228704.930002] [<ffffffff8022afa8>] ? schedule_tail+0x27/0x5f
    > > [228704.930002] [<ffffffff8020ccb9>] ? child_rip+0xa/0x11
    > > [228704.930002] [<ffffffff8023f67b>] ? kthread+0x0/0x75
    > > [228704.930002] [<ffffffff8020ccaf>] ? child_rip+0x0/0x11
    > > [228704.930002]
    > > [228704.930002]
    > > [228704.930002] Code: 6f 18 48 89 7b 30 48 8b 11 48 8b 41 08 48 89 42 08 48 89 10 48 89 49 08 48 89 09 fe 03 fb 48 8b 41 f8 48 83 e0 fc 48 39 d8 74 04 <0f> 0b eb fe f0 80 61 f8 fe ff d5 65 48 8b 04 25 10 00 00 00 8b
    > > [228704.930002] RIP [<ffffffff8023c6db>] run_workqueue+0x6f/0x102
    > > [228704.930002] RSP <ffff880214bcdec0>
    > > [228704.941003] ---[ end trace deef6e5387b5a584 ]---
    >
    > Thanks for any input, for reight now I'm quite helpless....



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