diff options
| author | Huaisheng Ye <yehs1@lenovo.com> | 2019-09-02 18:04:50 +0800 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2019-09-05 13:22:05 -0400 |
| commit | 6d1959138c8bdaf69f1116c86c77e6733db6ab34 (patch) | |
| tree | 815b3f36d5696680afc258714a210b5966594bc6 /drivers/md | |
| parent | fb16c799b8dca78b847ab183e8aa70e34cbf21bc (diff) | |
| download | lwn-6d1959138c8bdaf69f1116c86c77e6733db6ab34.tar.gz lwn-6d1959138c8bdaf69f1116c86c77e6733db6ab34.zip | |
dm writecache: skip writecache_wait for pmem mode
The array bio_in_progress[2] only have chance to be increased and
decreased with ssd mode. For pmem mode, they are not involved at all.
So skip writecache_wait_for_ios in writecache_flush for pmem.
Suggested-by: Doris Yu <tyu1@lenovo.com>
Signed-off-by: Huaisheng Ye <yehs1@lenovo.com>
Acked-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/dm-writecache.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/md/dm-writecache.c b/drivers/md/dm-writecache.c index c48194703dbc..d06b8aa41e26 100644 --- a/drivers/md/dm-writecache.c +++ b/drivers/md/dm-writecache.c @@ -726,7 +726,8 @@ static void writecache_flush(struct dm_writecache *wc) } writecache_commit_flushed(wc); - writecache_wait_for_ios(wc, WRITE); + if (!WC_MODE_PMEM(wc)) + writecache_wait_for_ios(wc, WRITE); wc->seq_count++; pmem_assign(sb(wc)->seq_count, cpu_to_le64(wc->seq_count)); |