From: Kent Overstreet <kmo@daterainc.com>
Date: Tue, 24 Sep 2013 06:17:32 +0000 (-0700)
Subject: bcache: Fix a flush/fua performance bug
X-Git-Tag: v3.11.4~51
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=37290c9af2482fb1e6e763dab7b1f9aa7b6371cc;p=thirdparty%2Fkernel%2Fstable.git

bcache: Fix a flush/fua performance bug

commit 1394d6761b6e9e15ee7c632a6d48791188727b40 upstream.

bch_journal_meta() was missing the flush to make the journal write
actually go down (instead of waiting up to journal_delay_ms)...

Whoops

Signed-off-by: Kent Overstreet <kmo@daterainc.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/md/bcache/journal.c b/drivers/md/bcache/journal.c
index f5203dfc4cfe9..8435f81e5d858 100644
--- a/drivers/md/bcache/journal.c
+++ b/drivers/md/bcache/journal.c
@@ -695,6 +695,7 @@ void bch_journal_meta(struct cache_set *c, struct closure *cl)
 		if (cl)
 			BUG_ON(!closure_wait(&w->wait, cl));
 
+		closure_flush(&c->journal.io);
 		__journal_try_write(c, true);
 	}
 }