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: firefly_0821_release~176^2~475^2~355
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=f4c87d7c2e5d6d20fb35066f3ee51e4bdc467d74;p=firefly-linux-kernel-4.4.55.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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/md/bcache/btree.c b/drivers/md/bcache/btree.c
index 4a1179cbc52e..22b9e34ceb75 100644
--- a/drivers/md/bcache/btree.c
+++ b/drivers/md/bcache/btree.c
@@ -1741,6 +1741,7 @@ 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!");