Commit a143e172 authored Jun 12, 2020 by Huaisheng Ye Committed by Mike Snitzer Jun 17, 2020

dm writecache: skip writecache_wait when using pmem mode



The array bio_in_progress is only used with ssd mode. So skip
writecache_wait_for_ios in writecache_discard when pmem mode.

Signed-off-by: Huaisheng Ye <yehs1@lenovo.com>
Acked-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>

parent 39495b12

drivers/md/dm-writecache.c

+4 −2

Original line number	Diff line number	Diff line
		@@ -849,8 +849,10 @@ static void writecache_discard(struct dm_writecache *wc, sector_t start, sector_

		if (likely(!e->write_in_progress)) {
		if (!discarded_something) {
		if (!WC_MODE_PMEM(wc)) {
		writecache_wait_for_ios(wc, READ);
		writecache_wait_for_ios(wc, WRITE);
		}
		discarded_something = true;
		}
		if (!writecache_entry_is_committed(wc, e))

Admin message