From e8fd52eec2cd25b917983b3f3aa738b722522376 Mon Sep 17 00:00:00 2001 From: Shaohua Li Date: Fri, 10 Feb 2017 16:18:08 -0800 Subject: [PATCH] md/raid5-cache: stripe reclaim only counts valid stripes When log space is tight, we try to reclaim stripes from log head. There are stripes which can't be reclaimed right now if some conditions are met. We skip such stripes but accidentally count them, which might cause no stripes are claimed. Fixing this by only counting valid stripes. Cc: Song Liu Signed-off-by: Shaohua Li --- drivers/md/raid5-cache.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/md/raid5-cache.c b/drivers/md/raid5-cache.c index caae85331a02..a01f4daeb390 100644 --- a/drivers/md/raid5-cache.c +++ b/drivers/md/raid5-cache.c @@ -1418,9 +1418,9 @@ static void r5c_do_reclaim(struct r5conf *conf) !test_bit(STRIPE_HANDLE, &sh->state) && atomic_read(&sh->count) == 0) { r5c_flush_stripe(conf, sh); + if (count++ >= R5C_RECLAIM_STRIPE_GROUP) + break; } - if (count++ >= R5C_RECLAIM_STRIPE_GROUP) - break; } spin_unlock(&conf->device_lock); spin_unlock_irqrestore(&log->stripe_in_journal_lock, flags); -- 2.20.1