linux-kernel - 2.6.31-rc8 + patch-2.6.31-rc8-rt9 = oops in mptsas

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Message-ID: <4AA14523.7070405@gmail.com>
Date:	Fri, 04 Sep 2009 12:49:39 -0400
From:	Glenn Elliott <arakageeta.lkml@...il.com>
To:	linux-kernel@...r.kernel.org
CC:	tglx@...utronix.de, DL-MPTFusionLinux@....com,
	Bjoern Brandenburg <bbb@...unc.edu>
Subject: 2.6.31-rc8 + patch-2.6.31-rc8-rt9 = oops in mptsas

Hello,

I get an oops when I boot 2.6.31-rc8 with the Realtime Preempt patch, 
patch-2.6.31-rc8-rt9, on my IBM QS22 (Cell Blade-- PPC-based).  It 
appears to be happening somewhere in the SAS disk related driver, mptsas.

The unpatched 2.6.31-rc8 boots without issue.  I am using the 
cell_defconfig configuration with the same minor additions (IPv6, 
auditing, etc.) for both patched and unpatched kernels.  The RT-patched 
configuration also includes the necessary RT-related settings.

Below is the captured oops, with a little extra logging, from the serial 
console (it didn't make it to /var/log/messages).  I would be happy to 
provide any additional information.

Thank you,
Glenn Elliott

mptscsih: ioc0: attempting task abort! (sc=c0000007fdd02080)
sd 0:0:0:0: CDB: cdb[0]=0x1a: 1a 00 08 00 04 00
mptscsih: ioc0: WARNING - Issuing Reset from mptscsih_IssueTaskMgmt!!
mptbase: ioc0: Initiating recovery
mptscsih: ioc0: task abort: SUCCESS (sc=c0000007fdd02080)
mptscsih: ioc0: attempting task abort! (sc=c0000007fdd02080)
sd 0:0:0:0: CDB: cdb[0]=0x0: 00 00 00 00 00 00
mptbase: ioc0: WARNING - Issuing Reset from mpt_config!!
mptbase: ioc0: Initiating recovery
mptscsih: ioc0: WARNING - Issuing Reset from mptscsih_IssueTaskMgmt!!
mptscsih: ioc0: task abort: SUCCESS (sc=c0000007fdd02080)
mptscsih: ioc0: attempting target reset! (sc=c0000007fdd02080)
sd 0:0:0:0: CDB: cdb[0]=0x1a: 1a 00 08 00 04 00
mptscsih: ioc0: WARNING - TaskMgmt type=3: ioc_state: DOORBELL_ACTIVE 
(0x2c000000)!
mptscsih: ioc0: target reset: FAILED (sc=c0000007fdd02080)
mptscsih: ioc0: attempting bus reset! (sc=c0000007fdd02080)
sd 0:0:0:0: CDB: cdb[0]=0x1a: 1a 00 08 00 04 00
mptscsih: ioc0: WARNING - TaskMgmt type=4: ioc_state: DOORBELL_ACTIVE 
(0x2c000000)!
mptscsih: ioc0: bus reset: FAILED (sc=c0000007fdd02080)
mptscsih: ioc0: attempting host reset! (sc=c0000007fdd02080)
mptscsih: ioc0: host reset: SUCCESS (sc=c0000007fdd02080)
------------[ cut here ]------------
Badness at kernel/workqueue.c:372
NIP: c000000000086a04 LR: c000000000087cac CTR: c00000000030c5b8
REGS: c0000007fde230f0 TRAP: 0700   Not tainted  (2.6.31-rc8-rt9)
MSR: 9000000000029032 <EE,ME,CE,IR,DR>  CR: 44022024  XER: 20000000
TASK = c0000007fa3e5c50[2606] 'mpt/0' THREAD: c0000007fde20000 CPU: 2
GPR00: 0000000000000001 c0000007fde23370 c0000000006992b0 c0000003fdde0c80
GPR04: 0000000000000000 0000000000000000 000000000000000a c0000003fe0ce114
GPR08: 0000000000000000 c0000007fa3e5c50 c00000000044ebb0 0000000000000000
GPR12: 0000000000000000 c000000000722a00 0000000000000000 0000000000000004
GPR16: c0000003fe0ce998 c0000003fe0ce968 0000000000000000 0000000000000000
GPR20: 0000000000000001 0000000000000000 c0000003fe0ce108 0000000000000001
GPR24: 0000000000000000 0000000000000001 c0000003fe0ce100 c0000003fe0ce720
GPR28: c0000003fddf4000 c0000003fdde0c80 c000000000640080 0000000000000000
NIP [c000000000086a04] .flush_cpu_workqueue+0x2c/0xa4
LR [c000000000087cac] .flush_workqueue+0x68/0xb8
Call Trace:
[c0000007fde23370] [0000000000200200] 0x200200 (unreliable)
[c0000007fde23470] [c000000000087cac] .flush_workqueue+0x68/0xb8
[c0000007fde23500] [c00000000030c320] 
.mptsas_cleanup_fw_event_q+0x128/0x154
[c0000007fde235b0] [c00000000030c650] .mptsas_ioc_reset+0x98/0xe0
[c0000007fde23640] [c0000000002f9610] .mpt_signal_reset+0x94/0xb4
[c0000007fde236c0] [c0000000003018e4] .mpt_do_ioc_recovery+0x15ec/0x16e8
[c0000007fde23890] [c000000000301ad8] .mpt_HardResetHandler+0xf8/0x19c
[c0000007fde23930] [c00000000030215c] .mpt_config+0x3d4/0x470
[c0000007fde23a30] [c0000000002ffd28] .mpt_findImVolumes+0xd0/0x6a0
[c0000007fde23c00] [c00000000030dacc] 
.mptsas_firmware_event_work+0x74/0x109c
[c0000007fde23d90] [c0000000000876e8] .worker_thread+0x20c/0x2e0
[c0000007fde23ea0] [c00000000008cb88] .kthread+0xa8/0xb4
[c0000007fde23f90] [c000000000025b68] .kernel_thread+0x54/0x70
Instruction dump:
4bfffe34 fba1ffe8 7c0802a6 f8010010 7c7d1b78 fbe1fff8 f821ff01 e80d01b0
e92300a0 7c004a78 7c000074 7800d182 <0b000000> 48395349 60000000 38bd0038
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