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c157313791
linux/drivers/md/bcache
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tang.junhui c157313791 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>
2017-10-30 15:57:54 -06:00
..
alloc.c bcache: update bucket_in_use in real time 2017-10-30 15:57:54 -06:00
bcache.h bcache: update bucket_in_use in real time 2017-10-30 15:57:54 -06:00
bset.c sched/headers: Prepare for new header dependencies before moving code to <linux/sched/clock.h> 2017-03-02 08:42:27 +01:00
bset.h bcache: fix typo in bch_bkey_equal_header 2014-08-04 15:23:03 -07:00
btree.c bcache: update bucket_in_use in real time 2017-10-30 15:57:54 -06:00
btree.h bcache: update bucket_in_use in real time 2017-10-30 15:57:54 -06:00
closure.c bcache: Don't reinvent the wheel but use existing llist API 2017-09-06 08:17:33 -06:00
closure.h bcache: safeguard a dangerous addressing in closure_queue 2017-10-16 09:07:26 -06:00
debug.c block: replace bi_bdev with a gendisk pointer and partitions index 2017-08-23 12:49:55 -06:00
debug.h bcache: Convert debug code to btree_keys 2014-01-08 13:05:13 -08:00
extents.c bcache: Fix a journal replay bug 2014-08-04 15:23:02 -07:00
extents.h bcache: Fix a journal replay bug 2014-08-04 15:23:02 -07:00
io.c block: replace bi_bdev with a gendisk pointer and partitions index 2017-08-23 12:49:55 -06:00
journal.c block: replace bi_bdev with a gendisk pointer and partitions index 2017-08-23 12:49:55 -06:00
journal.h bcache: Fix a shutdown bug 2014-02-25 18:42:49 -08:00
Kconfig bcache: Kill dead cgroup code 2014-03-18 12:22:35 -07:00
Makefile bcache: Abstract out stuff needed for sorting 2014-01-08 13:05:12 -08:00
movinggc.c block: switch bios to blk_status_t 2017-06-09 09:27:32 -06:00
request.c bcache: fix wrong cache_misses statistics 2017-10-30 15:57:54 -06:00
request.h block: switch bios to blk_status_t 2017-06-09 09:27:32 -06:00
stats.c bcache: Kill dead cgroup code 2014-03-18 12:22:35 -07:00
stats.h bcache: Break up struct search 2013-11-10 21:56:32 -08:00
super.c bcache: convert cached_dev.count from atomic_t to refcount_t 2017-10-30 15:57:54 -06:00
sysfs.c bcache: implement PI controller for writeback rate 2017-10-16 09:07:26 -06:00
sysfs.h
trace.c bcache: Better alloc tracepoints 2014-03-18 12:22:35 -07:00
util.c bcache: writeback rate clamping: make 32 bit safe 2017-10-16 13:00:10 -06:00
util.h bcache: writeback rate shouldn't artifically clamp 2017-10-16 09:07:26 -06:00
writeback.c bcache: rearrange writeback main thread ratelimit 2017-10-16 09:07:26 -06:00
writeback.h bcache: convert cached_dev.count from atomic_t to refcount_t 2017-10-30 15:57:54 -06:00