Message-Id: <20090927164314.9377c24c.sfr@canb.auug.org.au>
Date:	Sun, 27 Sep 2009 16:43:14 +1000
From:	Stephen Rothwell <sfr@...b.auug.org.au>
To:	James Bottomley <James.Bottomley@...senPartnership.com>
Cc:	linux-next@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
	James Smart <James.Smart@...lex.Com>
Subject: linux-next: scsi tree boot filure

Hi James,

next-20090926 does not boot on some of my PowerPC partitions:

calling  .ibmvscsi_module_init+0x0/0xb8 @ 1
ibmvscsi 30000028: SRP_VERSION: 16.a
scsi0 : IBM POWER Virtual SCSI Adapter 1.5.8
ibmvscsi 30000028: partner initialization complete
ibmvscsi 30000028: host srp version: 16.a, host partition 1-Didgo-VIOS (1), OS 3, max io 1048576
ibmvscsi 30000028: Client reserve enabled
ibmvscsi 30000028: sent SRP login
ibmvscsi 30000028: SRP_LOGIN succeeded
Unable to handle kernel paging request for data at address 0x00000058
Faulting instruction address: 0xc0000000003a6280
Oops: Kernel access of bad area, sig: 11 [#1]
SMP NR_CPUS=128 NUMA pSeries
Modules linked in:
NIP: c0000000003a6280 LR: c0000000003a63b4 CTR: 0000000000000000
REGS: c00000007c3f3020 TRAP: 0300   Not tainted  (2.6.31-autokern1)
MSR: 8000000000009032 <EE,ME,IR,DR>  CR: 24002042  XER: 00000001
DAR: 0000000000000058, DSISR: 0000000040000000
TASK = c00000007c3e8000[1] 'swapper' THREAD: c00000007c3f0000 CPU: 3
GPR00: 0000000000000000 c00000007c3f32a0 c000000000bc5390 c000000000a76420 
GPR04: c000000000b97818 c0000000015abc70 0000000000000000 c00000007c81c918 
GPR08: c00000007c81c888 0000000002000000 0000000000000002 c0000000014ecbcc 
GPR12: 0000000024000042 c000000000c1ea80 0000000003500000 c00000000074af10 
GPR16: c000000000749588 0000000000000000 0000000000000000 0000000000000000 
GPR20: c00000007c3f3600 c000000079074c00 c00000007c81c000 0000000002f1f8e0 
GPR24: 0000000000000000 0000000000000000 0000000000000000 c000000079074c28 
GPR28: c00000007c81c000 0000000000000000 c000000000b353f0 c000000000b97818 
NIP [c0000000003a6280] .__scsi_alloc_queue+0x2c/0x13c
LR [c0000000003a63b4] .scsi_alloc_queue+0x24/0x84
Call Trace:
[c00000007c3f32a0] [c00000007c3f3330] 0xc00000007c3f3330 (unreliable)
[c00000007c3f3330] [c0000000003a63b4] .scsi_alloc_queue+0x24/0x84
[c00000007c3f33b0] [c0000000003a8f78] .scsi_alloc_sdev+0x198/0x2ac
[c00000007c3f3470] [c0000000003a9450] .scsi_probe_and_add_lun+0x130/0xaac
[c00000007c3f3580] [c0000000003aa20c] .__scsi_scan_target+0xf4/0x5fc
[c00000007c3f36a0] [c0000000003aa768] .scsi_scan_channel+0x54/0xd0
[c00000007c3f3740] [c0000000003aa8b0] .scsi_scan_host_selected+0xcc/0x144
[c00000007c3f37f0] [c0000000003d5264] .ibmvscsi_probe+0x590/0x6e4
[c00000007c3f38c0] [c000000000021e88] .vio_bus_probe+0x84/0xb0
[c00000007c3f3960] [c00000000037cbac] .driver_probe_device+0xfc/0x1c0
[c00000007c3f39f0] [c00000000037cd04] .__driver_attach+0x94/0xd8
[c00000007c3f3a80] [c00000000037b9f8] .bus_for_each_dev+0x84/0xdc
[c00000007c3f3b30] [c00000000037c954] .driver_attach+0x28/0x40
[c00000007c3f3bb0] [c00000000037c290] .bus_add_driver+0x148/0x314
[c00000007c3f3c60] [c00000000037d1b0] .driver_register+0xd4/0x1a8
[c00000007c3f3d10] [c000000000021cbc] .vio_register_driver+0x40/0x5c
[c00000007c3f3da0] [c00000000084f418] .ibmvscsi_module_init+0x80/0xb8
[c00000007c3f3e30] [c0000000000094c8] .do_one_initcall+0x9c/0x1cc
[c00000007c3f3ee0] [c000000000822cc0] .kernel_init+0x21c/0x298
[c00000007c3f3f90] [c000000000026cb8] .kernel_thread+0x54/0x70
Instruction dump:
4e800020 7c0802a6 fb81ffe0 fbe1fff8 fba1ffe8 7c7c1b78 f8010010 f821ff71 
7c9f2378 eba302a0 48000008 ebbd0000 <e81d0058> 7fa3eb78 2fa00000 419efff0 
---[ end trace 18604a042ee6e0ba ]---
Kernel panic - not syncing: Attempted to kill init!
Call Trace:
[c00000007c3f2c80] [c00000000001024c] .show_stack+0x70/0x184 (unreliable)
[c00000007c3f2d30] [c00000000006a410] .panic+0x80/0x1b4
[c00000007c3f2dd0] [c00000000006eca4] .do_exit+0x84/0x728
[c00000007c3f2e90] [c000000000024d2c] .die+0x24c/0x27c
[c00000007c3f2f30] [c0000000000330c8] .bad_page_fault+0xb8/0xd4
[c00000007c3f2fb0] [c0000000000051dc] handle_page_fault+0x3c/0x74
--- Exception: 300 at .__scsi_alloc_queue+0x2c/0x13c
    LR = .scsi_alloc_queue+0x24/0x84
[c00000007c3f32a0] [c00000007c3f3330] 0xc00000007c3f3330 (unreliable)
[c00000007c3f3330] [c0000000003a63b4] .scsi_alloc_queue+0x24/0x84
[c00000007c3f33b0] [c0000000003a8f78] .scsi_alloc_sdev+0x198/0x2ac
[c00000007c3f3470] [c0000000003a9450] .scsi_probe_and_add_lun+0x130/0xaac
[c00000007c3f3580] [c0000000003aa20c] .__scsi_scan_target+0xf4/0x5fc
[c00000007c3f36a0] [c0000000003aa768] .scsi_scan_channel+0x54/0xd0
[c00000007c3f3740] [c0000000003aa8b0] .scsi_scan_host_selected+0xcc/0x144
[c00000007c3f37f0] [c0000000003d5264] .ibmvscsi_probe+0x590/0x6e4
[c00000007c3f38c0] [c000000000021e88] .vio_bus_probe+0x84/0xb0
[c00000007c3f3960] [c00000000037cbac] .driver_probe_device+0xfc/0x1c0
[c00000007c3f39f0] [c00000000037cd04] .__driver_attach+0x94/0xd8
[c00000007c3f3a80] [c00000000037b9f8] .bus_for_each_dev+0x84/0xdc
[c00000007c3f3b30] [c00000000037c954] .driver_attach+0x28/0x40
[c00000007c3f3bb0] [c00000000037c290] .bus_add_driver+0x148/0x314
[c00000007c3f3c60] [c00000000037d1b0] .driver_register+0xd4/0x1a8
[c00000007c3f3d10] [c000000000021cbc] .vio_register_driver+0x40/0x5c
[c00000007c3f3da0] [c00000000084f418] .ibmvscsi_module_init+0x80/0xb8
[c00000007c3f3e30] [c0000000000094c8] .do_one_initcall+0x9c/0x1cc
[c00000007c3f3ee0] [c000000000822cc0] .kernel_init+0x21c/0x298
[c00000007c3f3f90] [c000000000026cb8] .kernel_thread+0x54/0x70
Rebooting in 180 seconds..

I have bisected this down to commit
4acd10521ee002137b5d6791e234d7110033c782 ("[SCSI] scsi_lib_dma.c : fix
bug /w dma maps on virtual vc ports") which was added between
next-20090925 and next-20090926.

Reverting that single commit from next-20090926 allows it to boot.
-- 
Cheers,
Stephen Rothwell                    sfr@...b.auug.org.au
http://www.canb.auug.org.au/~sfr/

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