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| author | Mariusz Dabrowski <mariusz.dabrowski@intel.com> | 2019-02-18 15:04:09 +0100 |
|---|---|---|
| committer | Song Liu <songliubraving@fb.com> | 2019-03-12 10:15:18 -0700 |
| commit | a596d08677320925b69e70c0fdc4c0f59384a65e (patch) | |
| tree | 7ba718e75decf5f3c210a30386229a410c7b1829 /drivers/md/raid5-log.h | |
| parent | 9205e44916b2ca2e959be4210133292a19e79b0d (diff) | |
| download | linux-stable-a596d08677320925b69e70c0fdc4c0f59384a65e.tar.gz linux-stable-a596d08677320925b69e70c0fdc4c0f59384a65e.tar.bz2 linux-stable-a596d08677320925b69e70c0fdc4c0f59384a65e.zip | |
raid5: set write hint for PPL
When the Partial Parity Log is enabled, circular buffer is used to store
PPL data. Each write to RAID device causes overwrite of data in this buffer
so some write_hint can be set to those request to help drives handle
garbage collection. This patch adds new sysfs attribute which can be used
to specify which write_hint should be assigned to PPL.
Acked-by: Guoqing Jiang <gqjiang@suse.com>
Signed-off-by: Mariusz Dabrowski <mariusz.dabrowski@intel.com>
Signed-off-by: Song Liu <songliubraving@fb.com>
Diffstat (limited to 'drivers/md/raid5-log.h')
| -rw-r--r-- | drivers/md/raid5-log.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/md/raid5-log.h b/drivers/md/raid5-log.h index bfb811407061..43c714a8798c 100644 --- a/drivers/md/raid5-log.h +++ b/drivers/md/raid5-log.h @@ -45,6 +45,7 @@ extern void ppl_stripe_write_finished(struct stripe_head *sh); extern int ppl_modify_log(struct r5conf *conf, struct md_rdev *rdev, bool add); extern void ppl_quiesce(struct r5conf *conf, int quiesce); extern int ppl_handle_flush_request(struct r5l_log *log, struct bio *bio); +extern struct md_sysfs_entry ppl_write_hint; static inline bool raid5_has_log(struct r5conf *conf) { |