linux-kernel - RE: cciss: WARNING/BUG in do_cciss

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Date:	Fri, 6 Feb 2009 16:09:47 +0000
From:	"Miller, Mike (OS Dev)" <Mike.Miller@...com>
To:	Jens Axboe <jens.axboe@...cle.com>,
	Andrew Morton <akpm@...ux-foundation.org>
CC:	Randy Dunlap <randy.dunlap@...cle.com>,
	ISS StorageDev <iss_storagedev@...com>,
	scsi <linux-scsi@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	James Bottomley <James.Bottomley@...senPartnership.com>
Subject: RE: cciss: WARNING/BUG in do_cciss_intr (it's back)

Jens wrote: 

> 
> 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.
> 

I have some code that does a PCI PM reset on the controller. That's one way to ensure the controller gets sane again. Let me port it to 2.6.29-rc and I'll submit the patch.

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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