Commit a5bf4df0 authored Aug 25, 2011 by Namhyung Kim Committed by NeilBrown Aug 25, 2011

md: use REQ_NOIDLE flag in md_super_write()



Queue idling is used for the anticipation of immediate
sequencial I/O's but md_super_write() is a kind of one-
shot operation, coupled with md_super_wait(), so the
idling in this case will be just a waste of time.

Specifying REQ_NOIDLE prevents it. Instead of adding
the flag to submit_bio() directly, use pre-defined
macro WRITE_FLUSH_FUA.

Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Signed-off-by: NeilBrown <neilb@suse.de>

parent aeb9b211

drivers/md/md.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -848,7 +848,7 @@ void md_super_write(mddev_t mddev, mdk_rdev_t rdev,
		bio->bi_end_io = super_written;

		atomic_inc(&mddev->pending_writes);
		submit_bio(REQ_WRITE \| REQ_SYNC \| REQ_FLUSH \| REQ_FUA, bio);
		submit_bio(WRITE_FLUSH_FUA, bio);
		}

		void md_super_wait(mddev_t *mddev)

Admin message