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| author |   Qu Wenruo <quwenruo@cn.fujitsu.com> | 2017-04-14 08:35:54 +0800 |
|---|---|---|
| committer |   David Sterba <dsterba@suse.com> | 2017-04-18 14:07:27 +0200 |
| commit | 0966a7b1300f953b04b436aa82486d3d1b17c96d (patch) | |
| tree | 918f983ce93ded51f7c8176740cdaee6f1ee7eb6 /tools/perf/scripts/python/event_analyzing_sample.py | |
| parent | btrfs: Use ktime_get_real_ts for root ctime (diff) | |
| download | linux-dev-0966a7b1300f953b04b436aa82486d3d1b17c96d.tar.xz linux-dev-0966a7b1300f953b04b436aa82486d3d1b17c96d.zip | |
btrfs: scrub: Introduce full stripe lock for RAID56
Unlike mirror based profiles, RAID5/6 recovery needs to read out the
whole full stripe.
And if we don't do proper protection, it can easily cause race condition.
Introduce 2 new functions: lock_full_stripe() and unlock_full_stripe()
for RAID5/6.
Which store a rb_tree of mutexes for full stripes, so scrub callers can
use them to lock a full stripe to avoid race.
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
[ minor comment adjustments ]
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'tools/perf/scripts/python/event_analyzing_sample.py')
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