Commit be2a2656 authored Oct 27, 2010 by NeilBrown

md: unplug writes to external bitmaps.



When writing to an 'external' bitmap we don't currently unplug the
device before waiting, so we can get a 3msec delay each time;
So use REQ_UNPLUG to force and unplug.

Signed-off-by: NeilBrown <neilb@suse.de>

parent a167f663

drivers/md/bitmap.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -343,7 +343,7 @@ static void write_page(struct bitmap bitmap, struct page page, int wait)
		atomic_inc(&bitmap->pending_writes);
		set_buffer_locked(bh);
		set_buffer_mapped(bh);
		submit_bh(WRITE, bh);
		submit_bh(WRITE \| REQ_UNPLUG \| REQ_SYNC, bh);
		bh = bh->b_this_page;
		}