Commit 6d195913 authored Sep 02, 2019 by Huaisheng Ye Committed by Mike Snitzer Sep 05, 2019

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>

parent fb16c799

drivers/md/dm-writecache.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -726,6 +726,7 @@ static void writecache_flush(struct dm_writecache *wc)
		}
		writecache_commit_flushed(wc);

		if (!WC_MODE_PMEM(wc))
		writecache_wait_for_ios(wc, WRITE);

		wc->seq_count++;