From: Kent Overstreet <kmo@daterainc.com>
Date: Mon, 30 Nov 2015 01:18:33 +0000 (-0800)
Subject: bcache: Add a cond_resched() call to gc
X-Git-Tag: v3.16.35~629
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=c79d19915d17e98c5cd036ee64c32e557c270967;p=thirdparty%2Fkernel%2Fstable.git

bcache: Add a cond_resched() call to gc

commit c5f1e5adf956e3ba82d204c7c141a75da9fa449a upstream.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Tested-by: Eric Wheeler <bcache@linux.ewheeler.net>
Cc: Kent Overstreet <kmo@daterainc.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---

diff --git a/drivers/md/bcache/btree.c b/drivers/md/bcache/btree.c
index 40a7a05e42ef6..181d3fc299571 100644
--- a/drivers/md/bcache/btree.c
+++ b/drivers/md/bcache/btree.c
@@ -1729,6 +1729,7 @@ static void bch_btree_gc(struct cache_set *c)
 	do {
 		ret = btree_root(gc_root, c, &op, &writes, &stats);
 		closure_sync(&writes);
+		cond_resched();
 
 		if (ret && ret != -EAGAIN)
 			pr_warn("gc failed!");