fengguang.wu@intel.com
2014-Jan-02 05:31 UTC
[block:for-3.14/core] kernel BUG at fs/bio.c:1748
Greetings,
We hit the below bug when doing write tests to btrfs.
Other filesystems (ext4, xfs) works fine. 2 full dmesgs are attached.
196d38bccfcfa32faed8c561868336fdfa0fe8e4 is the first bad commit
commit 196d38bccfcfa32faed8c561868336fdfa0fe8e4
Author: Kent Overstreet <kmo@daterainc.com>
AuthorDate: Sat Nov 23 18:34:15 2013 -0800
Commit: Kent Overstreet <kmo@daterainc.com>
CommitDate: Sat Nov 23 22:33:56 2013 -0800
block: Generic bio chaining
This adds a generic mechanism for chaining bio completions. This is
going to be used for a bio_split() replacement, and it turns out to be
very useful in a fair amount of driver code - a fair number of drivers
were implementing this in their own roundabout ways, often painfully.
Note that this means it's no longer to call bio_endio() more than once
on the same bio! This can cause problems for drivers that save/restore
bi_end_io. Arguably they shouldn't be saving/restoring bi_end_io at all
- in all but the simplest cases they'd be better off just cloning the
bio, and immutable biovecs is making bio cloning cheaper. But for now,
we add a bio_endio_nodec() for these cases.
Signed-off-by: Kent Overstreet <kmo@daterainc.com>
Cc: Jens Axboe <axboe@kernel.dk>
drivers/md/bcache/io.c | 2 +-
drivers/md/dm-cache-target.c | 6 ++++
drivers/md/dm-snap.c | 1 +
drivers/md/dm-thin.c | 8 +++--
drivers/md/dm-verity.c | 2 +-
fs/bio-integrity.c | 2 +-
fs/bio.c | 76 ++++++++++++++++++++++++++++++++++++++++----
include/linux/bio.h | 2 ++
include/linux/blk_types.h | 2 ++
9 files changed, 90 insertions(+), 11 deletions(-)
[ 35.466413] random: nonblocking pool is initialized
[ 196.918039] ------------[ cut here ]------------
[ 196.919770] kernel BUG at fs/bio.c:1748!
[ 196.921505] invalid opcode: 0000 [#1] SMP
[ 196.921788] Modules linked in: microcode processor
[ 196.921788] CPU: 1 PID: 0 Comm: swapper/1 Not tainted
3.13.0-rc6-01897-g2b48961 #1
[ 196.921788] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 196.921788] task: ffff8804094acad0 ti: ffff8804094e8000 task.ti:
ffff8804094e8000
[ 196.921788] RIP: 0010:[<ffffffff811ef01e>] [<ffffffff811ef01e>]
bio_endio+0x1e/0x6a
[ 196.921788] RSP: 0018:ffff88041fc83da8 EFLAGS: 00010046
[ 196.921788] RAX: 0000000000000000 RBX: 00000000fffffffb RCX: 00000001802a0002
[ 196.921788] RDX: 00000001802a0003 RSI: 0000000000000000 RDI: ffff8800299ff9e8
[ 196.921788] RBP: ffff88041fc83dc0 R08: ffffea00096cc980 R09: ffff8804097f5100
[ 196.921788] R10: ffffea000aeb8280 R11: ffffffff8143841e R12: ffff88025b326780
[ 196.921788] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000003000
[ 196.921788] FS: 0000000000000000(0000) GS:ffff88041fc80000(0000)
knlGS:0000000000000000
[ 196.921788] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 196.921788] CR2: 00007f16e7a1948f CR3: 000000007f85e000 CR4: 00000000000006e0
[ 196.921788] Stack:
[ 196.921788] ffff8800299ff9e8 ffff8800299ff9e8 ffff88025b326780
ffff88041fc83de8
[ 196.921788] ffffffff81438429 00000000fffffffb ffff8803d36e6c00
0000000000000000
[ 196.921788] ffff88041fc83e10 ffffffff811ef063 ffff8802bae0a1e8
ffff8802bae0a1e8
[ 196.921788] Call Trace:
[ 196.921788] <IRQ>
[ 196.921788] [<ffffffff81438429>] btrfs_end_bio+0x116/0x11d
[ 196.921788] [<ffffffff811ef063>] bio_endio+0x63/0x6a
[ 196.921788] [<ffffffff814cb712>] blk_mq_complete_request+0x89/0xfe
[ 196.921788] [<ffffffff814cb79d>] __blk_mq_end_io+0x16/0x18
[ 196.921788] [<ffffffff814cb7bf>] blk_mq_end_io+0x20/0xb1
[ 196.921788] [<ffffffff815a1ba9>] virtblk_done+0xa4/0xf6
[ 196.921788] [<ffffffff8155c463>] vring_interrupt+0x7c/0x8a
[ 196.921788] [<ffffffff81107427>] handle_irq_event_percpu+0x4a/0x1bc
[ 196.921788] [<ffffffff811075de>] handle_irq_event+0x45/0x61
[ 196.921788] [<ffffffff81109f40>] handle_edge_irq+0xd9/0xfb
[ 196.921788] [<ffffffff81039f56>] handle_irq+0x21/0x2a
[ 196.921788] [<ffffffff81a0c3fd>] do_IRQ+0x4d/0xb4
[ 196.921788] [<ffffffff81a034f2>] common_interrupt+0x72/0x72
[ 196.921788] <EOI>
[ 196.921788] [<ffffffff81065bfa>] ? native_safe_halt+0x6/0x8
[ 196.921788] [<ffffffff8103f5d8>] default_idle+0x38/0xc1
[ 196.921788] [<ffffffff8103fd04>] arch_cpu_idle+0x18/0x28
[ 196.921788] [<ffffffff81106b6b>] cpu_startup_entry+0x178/0x269
[ 196.921788] [<ffffffff81116954>] ?
clockevents_register_device+0x112/0x117
[ 196.921788] [<ffffffff8105ba60>] start_secondary+0x277/0x279
[ 196.921788] Code: ff ff eb bb 5b 41 5c 41 5d 41 5e 5d c3 0f 1f 44 00 00 55 48
89 e5 41 54 53 53 bb fb ff ff ff 48 85 ff 74 4c 8b 47 44 85 c0 7f 02 <0f>
0b 85 f6 74 07 f0 80 67 10 fe eb 09 48 8b 47 10 a8 01 0f 44
[ 196.921788] RIP [<ffffffff811ef01e>] bio_endio+0x1e/0x6a
[ 196.921788] RSP <ffff88041fc83da8>
[ 196.921788] ---[ end trace 0ec0fc28f7931a30 ]---
[ 196.921788] Kernel panic - not syncing: Fatal exception in interrupt
[ 196.921788] Rebooting in 10 seconds..
Thanks,
Fengguang