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authorColy Li <colyli@suse.de>2018-10-08 20:41:09 +0800
committerJens Axboe <axboe@kernel.dk>2018-10-08 08:19:40 -0600
commit752f66a75abad2ae40b4570b3c77b422389cffcf (patch)
treec8ca90145fc8dc948f2722a11b932aefb0b74940 /drivers/md/bcache
parent502b291568fc7faf1ebdb2c2590f12851db0ff76 (diff)
downloadtalos-op-linux-752f66a75abad2ae40b4570b3c77b422389cffcf.tar.gz
talos-op-linux-752f66a75abad2ae40b4570b3c77b422389cffcf.zip
bcache: use REQ_PRIO to indicate bio for metadata
In cached_dev_cache_miss() and check_should_bypass(), REQ_META is used to check whether a bio is for metadata request. REQ_META is used for blktrace, the correct REQ_ flag should be REQ_PRIO. This flag means the bio should be prior to other bio, and frequently be used to indicate metadata io in file system code. This patch replaces REQ_META with correct flag REQ_PRIO. CC Adam Manzanares because he explains to me what REQ_PRIO is for. Signed-off-by: Coly Li <colyli@suse.de> Cc: Adam Manzanares <adam.manzanares@wdc.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/md/bcache')
-rw-r--r--drivers/md/bcache/request.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/md/bcache/request.c b/drivers/md/bcache/request.c
index 4946d486f734..ee15fb039fd0 100644
--- a/drivers/md/bcache/request.c
+++ b/drivers/md/bcache/request.c
@@ -395,7 +395,7 @@ static bool check_should_bypass(struct cached_dev *dc, struct bio *bio)
* unless the read-ahead request is for metadata (eg, for gfs2).
*/
if (bio->bi_opf & (REQ_RAHEAD|REQ_BACKGROUND) &&
- !(bio->bi_opf & REQ_META))
+ !(bio->bi_opf & REQ_PRIO))
goto skip;
if (bio->bi_iter.bi_sector & (c->sb.block_size - 1) ||
@@ -877,7 +877,7 @@ static int cached_dev_cache_miss(struct btree *b, struct search *s,
}
if (!(bio->bi_opf & REQ_RAHEAD) &&
- !(bio->bi_opf & REQ_META) &&
+ !(bio->bi_opf & REQ_PRIO) &&
s->iop.c->gc_stats.in_use < CUTOFF_CACHE_READA)
reada = min_t(sector_t, dc->readahead >> 9,
get_capacity(bio->bi_disk) - bio_end_sector(bio));
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