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| author | Zhaolei <zhaolei@cn.fujitsu.com> | 2015-08-06 16:56:58 +0300 |
|---|---|---|
| committer | Chris Mason <clm@fb.com> | 2015-08-09 17:07:14 +0300 |
| commit | 93314e3b64fd2e77237fdba7cfcc0d38dcd05579 (patch) | |
| tree | 16a545b8fb3679186e8092414e6c4693ceb795b6 /tools/perf/util/scripting-engines/trace-event-python.c | |
| parent | 147d256e0980e31505d25d721be979d6a8d2148c (diff) | |
| download | linux-93314e3b64fd2e77237fdba7cfcc0d38dcd05579.tar.xz | |
btrfs: abort transaction on btrfs_reloc_cow_block()
When btrfs_reloc_cow_block() failed in __btrfs_cow_block(), current
code just return a err-value to caller, but leave new_created extent
buffer exist and locked.
Then subsequent code (in relocate) try to lock above eb again,
and caused deadlock without any dmesg.
(eb lock use wait_event(), so no lockdep message)
It is hard to do recover work in __btrfs_cow_block() at this error
point, but we can abort transaction to avoid deadlock and operate on
unstable state.a
It also helps developer to find wrong place quickly.
(better than a frozen fs without any dmesg before patch)
Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>
Diffstat (limited to 'tools/perf/util/scripting-engines/trace-event-python.c')
0 files changed, 0 insertions, 0 deletions