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| author | tang.junhui <tang.junhui@zte.com.cn> | 2017-10-30 14:46:34 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2017-10-30 15:57:54 -0600 |
| commit | c157313791a999646901b3e3c6888514ebc36d62 (patch) | |
| tree | 8b5fef73f04ef261fcc6761950795ebd3db9cc5c /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | d44c2f9e7cc0041f0cd88df1fe7a1fceb713ab14 (diff) | |
bcache: fix wrong cache_misses statistics
Currently, Cache missed IOs are identified by s->cache_miss, but actually,
there are many situations that missed IOs are not assigned a value for
s->cache_miss in cached_dev_cache_miss(), for example, a bypassed IO
(s->iop.bypass = 1), or the cache_bio allocate failed. In these situations,
it will go to out_put or out_submit, and s->cache_miss is null, which leads
bch_mark_cache_accounting() to treat this IO as a hit IO.
[ML: applied by 3-way merge]
Signed-off-by: tang.junhui <tang.junhui@zte.com.cn>
Reviewed-by: Michael Lyle <mlyle@lyle.org>
Reviewed-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions