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    SubjectRe: cciss: WARNING/BUG in do_cciss_intr (it's back)
    On Thu, Feb 05 2009, Miller, Mike (OS Dev) wrote:
    >
    >
    > > -----Original Message-----
    > > From: Randy Dunlap [mailto:randy.dunlap@oracle.com]
    > > Sent: Wednesday, February 04, 2009 11:45 AM
    > > To: Miller, Mike (OS Dev); ISS StorageDev; scsi; Linux Kernel
    > > Mailing List
    > > Subject: cciss: WARNING/BUG in do_cciss_intr (it's back)
    > >
    > > Hi Mike,
    > >
    > > Was there any debugging code added to try to help with this problem?
    > > or is that the WARNING before the BUG?
    > >
    >
    > Randy,
    > I think this is a different bug than the one you reported previously.
    > Please open a new bugzilla.

    I think it's the same one. The first warning that now triggers is:

    WARNING: at drivers/block/cciss.c:225

    which is

    if (WARN_ON(hlist_unhashed(&c->list)))

    removeQ(), this is where we would have crashed before due to trying to
    remove a command from a list it didn't belong to. And then we crash
    right after in the interrupt handler. So I'm pretty sure this is 100%
    the same bug.

    Randy, is this still using kexec? Perhaps cciss needs a better
    kick-in-the-pants reset on driver load to clear EVERYTHING, there's
    clearly something very bad happening there.


    >
    > Thanks,
    > -- mikem
    >
    > >
    > > Booting 2.6.29-rc3-git6 oopsed with:
    > >
    > > calling cciss_init+0x0/0x2e [cciss] @ 733 HP CISS Driver (v 3.6.20)
    > > ACPI: PCI Interrupt Link [LNKA] enabled at IRQ 54 cciss
    > > 0000:42:08.0: PCI INT A -> Link[LNKA] -> GSI 54 (level, high)
    > > -> IRQ 54 cciss 0000:42:08.0: irq 56 for MSI/MSI-X IRQ
    > > 56/cciss0: IRQF_DISABLED is not guaranteed on shared IRQs
    > > cciss0: <0x3238> at PCI 0000:42:08.0 IRQ 56 using DAC
    > > ------------[ cut here ]------------
    > > WARNING: at drivers/block/cciss.c:225
    > > do_cciss_intr+0x58f/0x99a [cciss]() Hardware name: ProLiant
    > > BL685c G1 Modules linked in: cciss(+) ehci_hcd ohci_hcd uhci_hcd
    > > Pid: 0, comm: swapper Not tainted 2.6.29-rc3-git6 #1 Call Trace:
    > > <IRQ> [<ffffffff8023a741>] warn_slowpath+0xd3/0xf2
    > > [<ffffffff80243a44>] ? __mod_timer+0xc1/0xd3
    > > [<ffffffff8041469f>] ? smi_timeout+0xd9/0xe5
    > > [<ffffffff8024f86a>] ? ktime_get_ts+0x49/0x4e
    > > [<ffffffff804145c6>] ? smi_timeout+0x0/0xe5
    > > [<ffffffffa0024c4b>] do_cciss_intr+0x58f/0x99a [cciss]
    > > [<ffffffff8026ed21>] handle_IRQ_event+0x27/0x57
    > > [<ffffffff8027057d>] handle_edge_irq+0xde/0x11f
    > > [<ffffffff8020e302>] do_IRQ+0xdc/0x152 [<ffffffff8020ca13>]
    > > ret_from_intr+0x0/0xa <EOI> <4>---[ end trace a8b437cd48391e28 ]---
    > > BUG: unable to handle kernel NULL pointer dereference at
    > > 00000000000000f4
    > > IP: [<ffffffffa0024c93>] do_cciss_intr+0x5d7/0x99a [cciss] PGD 0
    > > Oops: 0002 [#1] SMP
    > > last sysfs file: /sys/block/ram15/dev
    > > CPU 2
    > > Modules linked in: cciss(+) ehci_hcd ohci_hcd uhci_hcd
    > > Pid: 0, comm: swapper Tainted: G W 2.6.29-rc3-git6 #1
    > > RIP: 0010:[<ffffffffa0024c93>] [<ffffffffa0024c93>]
    > > do_cciss_intr+0x5d7/0x99a [cciss]
    > > RSP: 0018:ffff88027f12fef0 EFLAGS: 00010046
    > > RAX: 0000000000000000 RBX: ffff88007f840270 RCX: 0000000000013888
    > > RDX: 0000000000008080 RSI: 0000000000000046 RDI: 0000000000000009
    > > RBP: ffff88027f12ff20 R08: 000000447f12fa70 R09: ffff88017e540700
    > > R10: 0000000000000000 R11: 0000000000000000 R12: ffff88007f8404b0
    > > R13: ffff88027e1a0000 R14: 0000000000000000 R15: 0000000000000086
    > > FS: 0000000000680850(0000) GS:ffff88017f121380(0000)
    > > knlGS:0000000000000000
    > > CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b
    > > CR2: 00000000000000f4 CR3: 0000000000201000 CR4: 00000000000006e0
    > > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
    > > DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7:
    > > 0000000000000400 Process swapper (pid: 0, threadinfo
    > > ffff88017f164000, task ffff88017fa5d4c0)
    > > Stack:
    > > 0000000000000001 ffff88027f126280 0000000000000000 0000000000000000
    > > 0000000000000038 0000000000000000 ffff88027f12ff50
    > > ffffffff8026ed21 ffffffff8076e000 0000000000000038
    > > ffff88027f126280 ffffffff8076e054 Call Trace:
    > > <IRQ> <0> [<ffffffff8026ed21>] handle_IRQ_event+0x27/0x57
    > > [<ffffffff8027057d>] handle_edge_irq+0xde/0x11f
    > > [<ffffffff8020e302>] do_IRQ+0xdc/0x152 [<ffffffff8020ca13>]
    > > ret_from_intr+0x0/0xa <EOI> <0>Code: 50 08 48 c7 83 40 02 00
    > > 00 00 00 00 00 49 c7 44 24 08 00 00 00 00 8b 83 34 02 00 00
    > > 85 c0 0f 85 49 03 00 00 4c 8b b3 50 02 00 00 <41> c7 86 f4 00
    > > 00 00 00 00 00 00 4c 8b 83 28 02 00 00 66 41 8b RIP
    > > [<ffffffffa0024c93>] do_cciss_intr+0x5d7/0x99a [cciss] RSP
    > > <ffff88027f12fef0>
    > > CR2: 00000000000000f4
    > > ---[ end trace a8b437cd48391e29 ]---
    > > Kernel panic - not syncing: Fatal exception in interrupt
    > >
    > >
    > >
    > > This is on an HP ProLiant BL685c G1, 4-proc system with
    > > 8 GB of RAM. (same as previous reports)
    > >
    > >
    > > Rebooting worked successfully.
    > >
    > > Thanks,
    > > --
    > > ~Randy
    > >
    --
    Jens Axboe



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