Message-ID: <47DFFE90.8050808@sgi.com>
Date:	Tue, 18 Mar 2008 12:40:32 -0500
From:	Michael Reed <mdr@....com>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	Sabuj Pattanayek <sabujp@...il.com>, linux-kernel@...r.kernel.org,
	linux-scsi@...r.kernel.org, "Moore, Eric" <Eric.Moore@....com>
Subject: Re: kernel exception in Fusion MPT base driver 3.04.06 (linux-2.6.24.3)

Andrew Morton wrote:
> On Mon, 17 Mar 2008 18:29:28 -0500 "Sabuj Pattanayek" <sabujp@...il.com> wrote:
> 
>> Hi,
> 
> Let's add some cc's.

Fixing up Eric's email address.  It's no longer "lsil.com".

(Question below.)

> 
>> I'm running (uname -a):
>>
>> Linux porpoise 2.6.24.3 #11 Mon Mar 17 17:24:30 CDT 2008 ppc64
>> PPC970FX, altivec supported RackMac3,1 GNU/Linux
>>
>> on an Apple Xserve G5. With the following fibre channel card (lspci
>> -vvv, it has two fibre connections):
>>
>> 0001:06:03.0 Fibre Channel: LSI Logic / Symbios Logic FC929X Fibre
>> Channel Adapter (rev 81)
>>         Subsystem: LSI Logic / Symbios Logic Unknown device 10d0
>>         Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
>> ParErr- Stepping- SERR- FastB2B- DisINTx-
>>         Status: Cap+ 66MHz+ UDF- FastB2B- ParErr- DEVSEL=medium
>>> TAbort- <TAbort- <MAbort- >SERR- <PERR+ INTx-
>>         Latency: 16 (16000ns min, 2500ns max), Cache Line Size: 64 bytes
>>         Interrupt: pin A routed to IRQ 53
>>         Region 0: I/O ports at 0400 [size=256]
>>         Region 1: Memory at 90030000 (64-bit, non-prefetchable) [size=64K]
>>         Region 3: Memory at 90020000 (64-bit, non-prefetchable) [size=64K]
>>         Expansion ROM at 90200000 [disabled] [size=1M]
>>         Capabilities: [50] Power Management version 2
>>                 Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA
>> PME(D0-,D1-,D2-,D3hot-,D3cold-)
>>                 Status: D0 PME-Enable- DSel=0 DScale=0 PME-
>>         Capabilities: [58] Message Signalled Interrupts: Mask- 64bit+
>> Queue=0/0 Enable-
>>                 Address: 0000000000000000  Data: 0000
>>         Capabilities: [68] PCI-X non-bridge device
>>                 Command: DPERE- ERO- RBC=2048 OST=8
>>                 Status: Dev=ff:1f.0 64bit+ 133MHz+ SCD- USC- DC=simple
>> DMMRBC=2048 DMOST=8 DMCRS=64 RSCEM- 266MHz- 533MHz-
>>
>> 0001:06:03.1 Fibre Channel: LSI Logic / Symbios Logic FC929X Fibre
>> Channel Adapter (rev 81)
>>         Subsystem: LSI Logic / Symbios Logic Unknown device 10d0
>>         Control: I/O- Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop-
>> ParErr- Stepping- SERR- FastB2B- DisINTx-
>>         Status: Cap+ 66MHz+ UDF- FastB2B- ParErr- DEVSEL=medium
>>> TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
>>         Latency: 16 (16000ns min, 2500ns max), Cache Line Size: 64 bytes
>>         Interrupt: pin B routed to IRQ 53
>>         Region 0: I/O ports at <unassigned> [disabled]
>>         Region 1: Memory at 90010000 (64-bit, non-prefetchable)
>> [disabled] [size=64K]
>>         Region 3: Memory at 90000000 (64-bit, non-prefetchable)
>> [disabled] [size=64K]
>>         Expansion ROM at 90100000 [disabled] [size=1M]
>>         Capabilities: [50] Power Management version 2
>>                 Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA
>> PME(D0-,D1-,D2-,D3hot-,D3cold-)
>>                 Status: D0 PME-Enable- DSel=0 DScale=0 PME-
>>         Capabilities: [58] Message Signalled Interrupts: Mask- 64bit+
>> Queue=0/0 Enable-
>>                 Address: 0000000000000000  Data: 0000
>>         Capabilities: [68] PCI-X non-bridge device
>>                 Command: DPERE- ERO- RBC=2048 OST=8
>>                 Status: Dev=ff:1f.1 64bit+ 133MHz+ SCD- USC- DC=simple
>> DMMRBC=2048 DMOST=8 DMCRS=64 RSCEM- 266MHz- 533MHz-
>>
>> After doing "modprobe mptfc" I get the following kernel exception
>> (dmesg output):
>>
>> Fusion MPT base driver 3.04.06
>> Copyright (c) 1999-2007 LSI Corporation
>> Fusion MPT FC Host driver 3.04.06
>> PCI: Enabling device: (0001:06:03.0), cmd 7
>> mptbase: ioc0: Initiating bringup
>> ioc0: LSIFC929XL A1: Capabilities={Initiator,Target,LAN}
>> scsi4 : ioc0: LSIFC929XL A1, FwRev=01020e00h, Ports=1, MaxQ=1023, IRQ=53
>> mptfc: ioc0: FC Link Established, Speed = 2 Gbps
>> Oops: Exception in kernel mode, sig: 4 [#1]
>> PowerMac
>> Modules linked in: mptfc mptscsih mptbase
>> NIP: d000000000144984 LR: d00000000014923c CTR: 0000000000000000
>> REGS: c0000001387ef8f0 TRAP: 0700   Not tainted  (2.6.24.3)
>> MSR: 9000000000089032 <EE,ME,IR,DR>  CR: 24002028  XER: 00000000
>> TASK = c0000001388db040[12431] 'mptfc_wq_4' THREAD: c0000001387ec000
>> GPR00: 00000000000000d3 c0000001387efb70 d000000000163b70 c000000138a8af1c
>> GPR04: 00000000d3000000 00000000ffffffff 0000000000000000 c000000138a8af00
>> GPR08: fffffffffffffffd 00000000000000ff 0000000000000000 00000000ffffffff
>> GPR12: d000000000150040 c0000000006f8280 000000000023fb28 c0000000005e25e0
>> GPR16: c0000001387efcb0 c0000001380dd758 c0000001387efcc0 c000000138978000
>> GPR20: 0000000000000000 c0000001387da000 000000000000067d c0000001380dd454
>> GPR24: c0000001387dd3e8 0000000000010000 d000000000159b87 c0000001380dd000
>> GPR28: c0000001387efcc0 c0000001387efcd0 d000000000162500 c000000138a8af00
>> NIP [d000000000144984] .mpt_add_sge+0x14/0x50 [mptbase]
>> LR [d00000000014923c] .mpt_config+0x16c/0x3b0 [mptbase]
>> Call Trace:
>> [c0000001387efb70] [d000000000149120] .mpt_config+0x50/0x3b0 [mptbase]
>> (unreliable)
>> [c0000001387efc40] [d00000000015ec8c] .mptfc_rescan_devices+0x17c/0x780 [mptfc]
>> [c0000001387efda0] [c0000000000548ac] .run_workqueue+0xec/0x1d0
>> [c0000001387efe40] [c0000000000556cc] .worker_thread+0xdc/0x190
>> [c0000001387eff00] [c00000000005a2e8] .kthread+0xc8/0xe0
>> [c0000001387eff90] [c0000000000217cc] .kernel_thread+0x4c/0x68
>> Instruction dump:
>> 200000d0 230fff00 210000d0 00010000 02010010 08002500 09200100 03090006
>> 230fff00 200000d0 230fff00 210000d0 <00010000> 02010010 08002500 09200100
>> ---[ end trace 45fe87d4d747696e ]---
> 
> OK, mtp-fusion seems to have gone splat.
> 
>> Unable to handle kernel paging request for data at address 0x230fff00210000d0
>> Faulting instruction address: 0xc000000000077658
>> Oops: Kernel access of bad area, sig: 11 [#2]
>> PowerMac
>> Modules linked in: mptfc mptscsih mptbase
>> NIP: c000000000077658 LR: c000000000077624 CTR: 000000000000000c
>> REGS: c00000013a3b7530 TRAP: 0300   Tainted: G      D  (2.6.24.3)
>> MSR: 9000000000009032 <EE,ME,IR,DR>  CR: 24002028  XER: 00000000
>> DAR: 230fff00210000d0, DSISR: 0000000040000000
>> TASK = c00000013a38a810[156] 'pdflush' THREAD: c00000013a3b4000
>> GPR00: 0000000000000010 c00000013a3b77b0 c0000000007e8218 000000000000000e
>> GPR04: 000000000000000e 00000000000008e8 c00000013897e6b8 0000000000024000
>> GPR08: 0000000000000002 0000000000000002 230fff00210000d0 0000000000000003
>> GPR12: 0000000000000010 c0000000006f8280 000000000023fb28 c0000000005e25e0
>> GPR16: c0000000006c6460 c00000013924fb28 0000000000000000 c00000013a3b7948
>> GPR20: c00000000078e2a0 0000000000000000 c0000001381dd440 c00000013924fb28
>> GPR24: ffffffffffffffff 000000000000000e 0000000000000000 c00000013a3b7da8
>> GPR28: c00000013a3b7940 000000000000000e c000000000765818 c00000013a3b7958
>> NIP [c000000000077658] .find_get_pages_tag+0x78/0x100
>> LR [c000000000077624] .find_get_pages_tag+0x44/0x100
>> Call Trace:
>> [c00000013a3b77b0] [c000000000110330]
>> .ext3_ordered_writepage+0x180/0x1e0 (unreliable)
>> [c00000013a3b7840] [c0000000000825fc] .pagevec_lookup_tag+0x2c/0x50
>> [c00000013a3b78d0] [c000000000080150] .write_cache_pages+0x1d0/0x450
>> [c00000013a3b7a50] [c0000000000804b4] .do_writepages+0xa4/0xb0
>> [c00000013a3b7ad0] [c0000000000cbf60] .__writeback_single_inode+0xb0/0x3c0
>> [c00000013a3b7bd0] [c0000000000cc724] .sync_sb_inodes+0x224/0x390
>> [c00000013a3b7c90] [c0000000000ccbb4] .writeback_inodes+0xe4/0x110
>> [c00000013a3b7d30] [c0000000000810f0] .wb_kupdate+0xf0/0x190
>> [c00000013a3b7e30] [c000000000081a28] .pdflush+0x178/0x280
>> [c00000013a3b7f00] [c00000000005a2e8] .kthread+0xc8/0xe0
>> [c00000013a3b7f90] [c0000000000217cc] .kernel_thread+0x4c/0x68
>> Instruction dump:
>> 7c7d1b79 41820074 393dffff 3ce00002 39000000 79290020 60e74000 39290001
>> 7d2903a6 60000000 79001f24 7d5f002a <e92a0000> 7d293838 7fa93800 41de0068
>> ---[ end trace 45fe87d4d747696e ]---
> 
> And that's a totally, wildly different part of the kernel.  ANd it's a
> code-path which millions of machines run all the time.
> 
> It's hard to see how oops #2 could be a consequence of oops #1.  Weird.
> 
>> Any ideas what's going on here? Attempting to run any further commands
>> (e.g. reboot) causes a segfault or hang of the command (e.g. ls). I
>> can send the enabled/modularized options of the .config in another
>> email if required. Please CC replies to sabujp@...il.com since I'm not
>> on the list.
>>
> 
> Did any earlier kernel work OK?  If so, which?  2.6.23??

Does the exception happen every time?

 Mike

> 
> Thanks.
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