From: NeilBrown Date: Mon, 10 Jul 2006 11:44:14 +0000 (-0700) Subject: [PATCH] md: possible fix for unplug problem X-Git-Tag: v2.6.18-rc2~225 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f4370781d83cd2e52eb515e4663155e8091e4d4e;p=linux-2.6 [PATCH] md: possible fix for unplug problem I have reports of a problem with raid5 which turns out to be because the raid5 device gets stuck in a 'plugged' state. This shouldn't be able to happen as 3msec after it gets plugged it should get unplugged. However it happens none-the-less. This patch fixes the problem and is a reasonable thing to do, though it might hurt performance slightly in some cases. Until I can find the real problem, we should probably have this workaround in place. Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c index 7433871f4b..5764387c69 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -270,7 +270,7 @@ static struct stripe_head *get_active_stripe(raid5_conf_t *conf, sector_t sector < (conf->max_nr_stripes *3/4) || !conf->inactive_blocked), conf->device_lock, - unplug_slaves(conf->mddev) + raid5_unplug_device(conf->mddev->queue) ); conf->inactive_blocked = 0; } else