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Date: Sun, 18 Feb 2007 01:53:16 +0100
From: Michal Piotrowski <michal.k.k.piotrowski@...il.com>
To: Andrew Morton <akpm@...ux-foundation.org>
CC: Michal Piotrowski <michal.k.k.piotrowski@...il.com>,
linux-kernel@...r.kernel.org, Jens Axboe <jens.axboe@...cle.com>
Subject: Re: mm snapshot broken-out-2007-02-17-03-25.tar.gz uploaded
Andrew Morton napisał(a):
> On Sat, 17 Feb 2007 23:23:17 +0100 "Michal Piotrowski" <michal.k.k.piotrowski@...il.com> wrote:
>
>> On 17/02/07, Andrew Morton <akpm@...ux-foundation.org> wrote:
>>> On Sat, 17 Feb 2007 20:58:55 +0100 "Michal Piotrowski" <michal.k.k.piotrowski@...il.com> wrote:
>>>
>>>> On 17/02/07, Andrew Morton <akpm@...ux-foundation.org> wrote:
>>>>> On Sat, 17 Feb 2007 19:36:39 +0100 Michal Piotrowski <michal.k.k.piotrowski@...il.com> wrote:
>>>>>
>>>>>> akpm@...ux-foundation.org napisał(a):
>>>>>>> The mm snapshot broken-out-2007-02-17-03-25.tar.gz has been uploaded to
>>>>>>>
>>>>>>> ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/mm/broken-out-2007-02-17-03-25.tar.gz
>>>>>>>
>>>>>> BUG: unable to handle kernel paging request at virtual address 6b6b6b6f
>>>>> hm, how did you make that happen?
>>>>>
>>>> I don't know. I can reproduce this bug.
>>>>
>>> Could you bisect it please? The patches to suspect are
>> [..]
>>> For git-block, do
>>>
>>> quilt pop scsi-megaraid_sas-return-sync-cache-call-with-success.patch
>>>
>>> and retest. If that doesn't fail, do
>>>
>>> quilt push git-block-xfs-barriers-broke.patch
>>>
>>> and retest.
>>>
>> Ok, this must be a git-block-* stuff.
>>
>> Jens, can you take a look at this bug?
>> http://www.ussg.iu.edu/hypermail/linux/kernel/0702.2/0646.html
>>
>
> I wonder why. I can't make it happen on two machines, scsi, sata and IDE.
> And afaict git-block isn't changed from 2.6.20-mm1.
>
> Are you sure?
>
Absolutely? No.
Do you believe in statistic?
10 clean boots
http://www.stardust.webpages.pl/files/tbf/bitis-gabonica/broken-out-2007-02-17-03-25/10_clean_boots_without_git_block_stuff.txt
10 boots with git-block-*
http://www.stardust.webpages.pl/files/tbf/bitis-gabonica/broken-out-2007-02-17-03-25/10_boots_with_git_bloack_stuff.txt
cat 10_boots_with_git_bloack_stuff.txt | grep "BUG: unable to handle kernel paging request at virtual address 6b6b6b6f" | wc -l
1
cat 10_boots_with_git_bloack_stuff.txt | grep "EIP"
EIP: 0060:[<c01df352>] Not tainted VLI
EIP is at blk_unplug_current+0x4d/0x132
EIP: [<c01df352>] blk_unplug_current+0x4d/0x132 SS:ESP 0068:f6eabd54
EIP: 0060:[<c01df352>] Not tainted VLI
EIP is at blk_unplug_current+0x4d/0x132
EIP: [<c01df352>] blk_unplug_current+0x4d/0x132 SS:ESP 0068:f6eabaf8
EIP: 0060:[<c01e2871>] Not tainted VLI
EIP is at __make_request+0xeb/0x2e6
EIP: [<c01e2871>] __make_request+0xeb/0x2e6 SS:ESP 0068:f7e35cc0
EIP: 0060:[<c01e11ee>] Not tainted VLI
EIP is at bio_attempt_back_merge+0x1b/0xb2
EIP: [<c01e11ee>] bio_attempt_back_merge+0x1b/0xb2 SS:ESP 0068:f6f31b88
----------------
BUG: unable to handle kernel NULL pointer dereference at virtual address 00000108
printing eip:
c01df352
*pde = 00000000
Oops: 0000 [#1]
PREEMPT SMP
last sysfs file: /block/sda/removable
Modules linked in: snd_intel8x0 snd_ac97_codec ac97_bus snd_seq_dummy snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss snd_mixer_oss snd_pcm evdev intel_agp snd_timer snd soundcore agpgart skge sk98lin snd_page_alloc i2c_i801 8139too mii ide_cd cdrom rtc unix
CPU: 0
EIP: 0060:[<c01df352>] Not tainted VLI
EFLAGS: 00010202 (2.6.20 #8)
EIP is at blk_unplug_current+0x4d/0x132
eax: f7c2bce8 ebx: 00000001 ecx: f6eab000 edx: c56deae0
esi: f7c2bcd4 edi: 00000000 ebp: f6eabd90 esp: f6eabd54
ds: 007b es: 007b fs: 00d8 gs: 0033 ss: 0068
Process vol_id (pid: 1313, ti=f6eab000 task=f6f800b0 task.ti=f6eab000)
Stack: 00000000 f6f800b0 c03159e5 00000000 f6eabd84 c013ca75 c6004fb0 f7c2bce8
00000046 c6004fb0 c6004fb0 00000282 00000001 c044bda0 05bd5d80 f6eabda4
c031377a f6eabdd0 f6eabdd0 c6004fb0 f6eabdac c01554d6 f6eabdc4 c03138d6
Call Trace:
[<c010513d>] show_trace_log_lvl+0x1a/0x2f
[<c01051ef>] show_stack_log_lvl+0x9d/0xa5
[<c01053e4>] show_registers+0x1ed/0x32c
[<c0105640>] die+0x11d/0x234
[<c0119729>] do_page_fault+0x43a/0x50d
[<c0315cac>] error_code+0x7c/0x84
[<c031377a>] io_schedule+0x3d/0x9a
[<c01554d6>] sleep_on_page+0x8/0xc
[<c03138d6>] __wait_on_bit_lock+0x30/0x59
[<c01554c7>] __lock_page+0x53/0x5a
[<c0155bc4>] do_generic_mapping_read+0x1cd/0x41e
[<c01578a3>] generic_file_aio_read+0x16a/0x197
[<c0171441>] do_sync_read+0xc2/0xff
[<c0171c51>] vfs_read+0xad/0x136
[<c0172084>] sys_read+0x3d/0x61
[<c0104164>] syscall_call+0x7/0xb
=======================
Code: 75 04 0f 0b eb fe 48 89 46 0c 85 c0 0f 85 f6 00 00 00 8b 7e <4>AC'97 0 analog subsections not ready
1c c7 46 1c 00 00 00 00 8d 46 14 89 45 e0 39 46 14 0f 84 c3 00 00 00 <8b> 87 08 01 00 00 e8 c8 62 13 00 c7 45 e4 00 00 00 00 8b 5e 14
EIP: [<c01df352>] blk_unplug_current+0x4d/0x132 SS:ESP 0068:f6eabd54
BUG: unable to handle kernel NULL pointer dereference at virtual address 00000108
printing eip:
c01df352
*pde = 00000000
Oops: 0000 [#2]
PREEMPT SMP
last sysfs file: /block/sdb/dev
Modules linked in: snd_intel8x0 snd_ac97_codec ac97_bus snd_seq_dummy snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss snd_mixer_oss snd_pcm evdev intel_agp snd_timer snd soundcore agpgart skge sk98lin snd_page_alloc i2c_i801 8139too mii ide_cd cdrom rtc unix
CPU: 1
EIP: 0060:[<c01df352>] Not tainted VLI
EFLAGS: 00010202 (2.6.20 #8)
EIP is at blk_unplug_current+0x4d/0x132
eax: f7c2bce8 ebx: f6eabb5c ecx: f6eabaec edx: f7d9ce70
esi: f7c2bcd4 edi: 00000000 ebp: f6eabb34 esp: f6eabaf8
ds: 007b es: 007b fs: 00d8 gs: 0000 ss: 0068
Process vol_id (pid: 1313, ti=f6eab000 task=f6f800b0 task.ti=f6eab000)
Stack: c03eb58c c5fc4560 f6eabb24 c01591c1 c015b3eb 00000000 c03eb480 f7c2bce8
00000000 00000000 00000000 00000000 f6eabb5c f7d9ce70 00000000 f6eabb48
c015a320 0000000a f7d9ce70 f6eabb84 f6eabb90 c015610c 00000000 00000000
Call Trace:
[<c010513d>] show_trace_log_lvl+0x1a/0x2f
[<c01051ef>] show_stack_log_lvl+0x9d/0xa5
[<c01053e4>] show_registers+0x1ed/0x32c
[<c0105640>] die+0x11d/0x234
[<c0119729>] do_page_fault+0x43a/0x50d
[<c0315cac>] error_code+0x7c/0x84
[<c015a320>] do_writepages+0x41/0x48
[<c015610c>] __filemap_fdatawrite_range+0x5b/0x67
[<c0156319>] filemap_fdatawrite+0x26/0x28
[<c015632f>] filemap_write_and_wait+0x14/0x2d
[<c018e04f>] sync_blockdev+0x17/0x1d
[<c0191a24>] __blkdev_put+0x45/0x129
[<c0191b12>] blkdev_put+0xa/0xc
[<c01923b9>] blkdev_close+0x28/0x2b
[<c017240e>] __fput+0xb9/0x163
[<c01724cf>] fput+0x17/0x19
[<c016feb1>] filp_close+0x54/0x5c
[<c012373a>] put_files_struct+0x67/0xa9
[<c01247ec>] do_exit+0x22b/0x702
[<c0105731>] die+0x20e/0x234
[<c0119729>] do_page_fault+0x43a/0x50d
[<c0315cac>] error_code+0x7c/0x84
[<c031377a>] io_schedule+0x3d/0x9a
[<c01554d6>] sleep_on_page+0x8/0xc
[<c03138d6>] __wait_on_bit_lock+0x30/0x59
[<c01554c7>] __lock_page+0x53/0x5a
[<c0155bc4>] do_generic_mapping_read+0x1cd/0x41e
[<c01578a3>] generic_file_aio_read+0x16a/0x197
[<c0171441>] do_sync_read+0xc2/0xff
[<c0171c51>] vfs_read+0xad/0x136
[<c0172084>] sys_read+0x3d/0x61
[<c0104164>] syscall_call+0x7/0xb
=======================
Code: 75 04 0f 0b eb fe 48 89 46 0c 85 c0 0f 85 f6 00 00 00 8b 7e 1c c7 46 1c 00 00 00 00 8d 46 14 89 45 e0 39 46 14 0f 84 c3 00 00 00 <8b> 87 08 01 00 00 e8 c8 62 13 00 c7 45 e4 00 00 00 00 8b 5e 14
EIP: [<c01df352>] blk_unplug_current+0x4d/0x132 SS:ESP 0068:f6eabaf8
0xc01df352 is in blk_unplug_current (block/ll_rw_blk.c:3739).
3734 ioc->plugged_queue = NULL;
3735 if (list_empty(&ioc->plugged_list))
3736 goto out;
3737
3738 nr_unplug = 0;
3739 spin_lock_irq(q->queue_lock);
3740 do {
3741 req = list_entry_rq(ioc->plugged_list.next);
3742 list_del_init(&req->queuelist);
3743 add_request(q, req);
------------[ cut here ]------------
kernel BUG at block/ll_rw_blk.c:2781!
invalid opcode: 0000 [#1]
PREEMPT SMP
last sysfs file: /block/hdd/dev
Modules linked in: snd_intel8x0 snd_ac97_codec ac97_bus snd_seq_dummy snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss snd_mixer_oss snd_pcm skge evdev snd_timer snd intel_agp sk98lin soundcore agpgart snd_page_alloc i2c_i801 8139too mii ide_cd cdrom rtc unix
CPU: 1
EIP: 0060:[<c01e11ee>] Not tainted VLI
EFLAGS: 00010282 (2.6.20 #8)
EIP is at bio_attempt_back_merge+0x1b/0xb2
eax: f7cb92c8 ebx: f7d32d60 ecx: f7d32d60 edx: f7fbf074
esi: f7fbf074 edi: f7cb92c8 ebp: f6f31ba8 esp: f6f31b88
ds: 007b es: 007b fs: 00d8 gs: 0033 ss: 0068
Process vol_id (pid: 1320, ti=f6f31000 task=f6deca80 task.ti=f6f31000)
Stack: f7cb92c8 f7fb007b f7d3007b c61e00d8 ffffff10 f7fbf074 f7cb92c8 c61ed89c
f6f31be0 c01e2855 f6f31bbc c031591f f7e032b0 f6f31c28 c016d6ec 00000000
f7d32d60 f7d32d60 f7fbf074 00000008 f7d32d60 00000000 f6f31c50 c01e0295
Call Trace:
[<c010513d>] show_trace_log_lvl+0x1a/0x2f
[<c01051ef>] show_stack_log_lvl+0x9d/0xa5
[<c01053e4>] show_registers+0x1ed/0x32c
[<c0105640>] die+0x11d/0x234
[<c01057d0>] do_trap+0x79/0x91
[<c0106060>] do_invalid_op+0x97/0xa1
[<c0315cac>] error_code+0x7c/0x84
[<c01e2855>] __make_request+0xcf/0x2e6
[<c01e0295>] generic_make_request+0x205/0x215
[<c01e2448>] submit_bio+0xf0/0xf8
[<c018d607>] submit_bh+0xbf/0xdc
[<c018fc1f>] block_read_full_page+0x25e/0x26e
[<c01915e1>] blkdev_readpage+0xf/0x11
[<c015af00>] __do_page_cache_readahead+0x16f/0x1c0
[<c015af9e>] blockable_page_cache_readahead+0x4d/0xa0
[<c015b1b5>] page_cache_readahead+0x128/0x18f
[<c0155b27>] do_generic_mapping_read+0x130/0x41e
[<c01578a3>] generic_file_aio_read+0x16a/0x197
[<c0171441>] do_sync_read+0xc2/0xff
[<c0171c51>] vfs_read+0xad/0x136
[<c0172084>] sys_read+0x3d/0x61
[<c0104164>] syscall_call+0x7/0xb
=======================
Code: ff ff ff e9 2c ff ff ff 83 c4 2c 5b 5e 5f 5d c3 55 89 e5 57 56 53 83 ec 14 89 c7 89 d6 89 cb f6 42 14 d8 75 06 83 7a 18 01 74 04 <0f> 0b eb fe e8 62 e3 ff ff 31 d2 85 c0 74 7e 8b bf ac 01 00 00
EIP: [<c01e11ee>] bio_attempt_back_merge+0x1b/0xb2 SS:ESP 0068:f6f31b88
0xc01e11ee is in bio_attempt_back_merge (block/ll_rw_blk.c:2781).
2776 }
2777
2778 static int bio_attempt_back_merge(request_queue_t *q, struct request *req,
2779 struct bio *bio)
2780 {
2781 BUG_ON(!rq_mergeable(req));
2782
2783 if (!ll_back_merge_fn(q, req, bio))
2784 return 0;
2785
Regards,
Michal
--
Michal K. K. Piotrowski
LTG - Linux Testers Group (PL)
(http://www.stardust.webpages.pl/ltg/)
LTG - Linux Testers Group (EN)
(http://www.stardust.webpages.pl/linux_testers_group_en/)
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