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| author | Shaohua Li <shli@fb.com> | 2017-02-10 16:18:09 -0800 |
|---|---|---|
| committer | Shaohua Li <shli@fb.com> | 2017-02-13 09:20:05 -0800 |
| commit | e33fbb9cc73d6502e69eaf1c178e0c39059763ea (patch) | |
| tree | 3a75c9e524eab2facb854a41e970dfb86fc538c1 /drivers/md/raid5.h | |
| parent | e8fd52eec2cd25b917983b3f3aa738b722522376 (diff) | |
| download | op-kernel-dev-e33fbb9cc73d6502e69eaf1c178e0c39059763ea.zip op-kernel-dev-e33fbb9cc73d6502e69eaf1c178e0c39059763ea.tar.gz | |
md/raid5-cache: exclude reclaiming stripes in reclaim check
stripes which are being reclaimed are still accounted into cached
stripes. The reclaim takes time. r5c_do_reclaim isn't aware of the
stripes and does unnecessary stripe reclaim. In practice, I saw one
stripe is reclaimed one time. This will cause bad IO pattern. Fixing
this by excluding the reclaing stripes in the check.
Cc: Song Liu <songliubraving@fb.com>
Signed-off-by: Shaohua Li <shli@fb.com>
Diffstat (limited to 'drivers/md/raid5.h')
| -rw-r--r-- | drivers/md/raid5.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/md/raid5.h b/drivers/md/raid5.h index c0687df..4bb27b9 100644 --- a/drivers/md/raid5.h +++ b/drivers/md/raid5.h @@ -663,6 +663,8 @@ struct r5conf { struct list_head r5c_full_stripe_list; atomic_t r5c_cached_partial_stripes; struct list_head r5c_partial_stripe_list; + atomic_t r5c_flushing_full_stripes; + atomic_t r5c_flushing_partial_stripes; atomic_t empty_inactive_list_nr; struct llist_head released_stripes; |
