Commit 2ee73ef6 authored by Mikulas Patocka's avatar Mikulas Patocka Committed by Mike Snitzer
Browse files

dm writecache: count number of blocks discarded, not number of discard bios 



Change dm-writecache, so that it counts the number of blocks discarded
instead of the number of discard bios. Make it consistent with the
read and write statistics counters that were changed to count the
number of blocks instead of bios.

Fixes: e3a35d03 ("dm writecache: add event counters")
Signed-off-by: default avatarMikulas Patocka <mpatocka@redhat.com>
Signed-off-by: default avatarMike Snitzer <snitzer@kernel.org>
parent b2676e14

Documentation/admin-guide/device-mapper/writecache.rst

+1 −1
Original line number Diff line number Diff line
@@ -89,7 +89,7 @@ Status: 
11. the number of write blocks that are allocated in the cache

12. the number of write requests that are blocked on the freelist

13. the number of flush requests

14. the number of discard requests

14. the number of discarded blocks



Messages:

	flush

drivers/md/dm-writecache.c

+1 −1
Original line number Diff line number Diff line
@@ -1514,7 +1514,7 @@ static enum wc_map_op writecache_map_flush(struct dm_writecache *wc, struct bio 


static enum wc_map_op writecache_map_discard(struct dm_writecache *wc, struct bio *bio)

{

	wc->stats.discards++;

	wc->stats.discards += bio->bi_iter.bi_size >> wc->block_size_bits;



	if (writecache_has_error(wc))

		return WC_MAP_ERROR;