bcache: update bio->bi_opf bypass/writeback REQ_ flag hints

Browse source

Flag for bypass if the IO is for read-ahead or background, unless the
read-ahead request is for metadata (eg, from gfs2).
        Bypass if:
                bio->bi_opf & (REQ_RAHEAD|REQ_BACKGROUND) &&
			!(bio->bi_opf & REQ_META))

        Writeback if:
                op_is_sync(bio->bi_opf) ||
			bio->bi_opf & (REQ_META|REQ_PRIO)

Signed-off-by: Eric Wheeler <bcache@linux.ewheeler.net>
Reviewed-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

...

This commit is contained in:

Eric Wheeler 2017-10-13 16:35:33 -07:00 • committed by Jens Axboe

parent e89d67596e

commit b41c9b0266

2 changed files with 11 additions and 1 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

8

drivers/md/bcache/request.c

View file

4

drivers/md/bcache/writeback.h

View file