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authorNeilBrown <neilb@suse.de>2010-10-27 15:37:41 +1100
committerNeilBrown <neilb@suse.de>2010-10-29 16:40:32 +1100
commitbe2a2656eef95c32ca73e7a6a8c85671aa92e3f1 (patch)
treecaea637e7247c0d57d8b1fe0042a5b7a0994ed9c /drivers/md
parenta167f663243662aa9153c01086580a11cde9ffdc (diff)
downloadlinux-be2a2656eef95c32ca73e7a6a8c85671aa92e3f1.tar.bz2
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>
Diffstat (limited to 'drivers/md')
-rw-r--r--drivers/md/bitmap.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c
index fdde0279755f..5a1ffe3527aa 100644
--- a/drivers/md/bitmap.c
+++ b/drivers/md/bitmap.c
@@ -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;
}