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 40a7a05e42ef65994f33840fdd9044fd509a31a0..181d3fc299571c7a7785c69b7c2b00613ecae4a3 100644 (file)
--- 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!");