From 1a0fd497733bd029a7d5f2e5c69b1dff715b7792 Mon Sep 17 00:00:00 2001 From: Neil Brown Date: Sat, 28 Jun 2008 08:31:27 +1000 Subject: [PATCH] Don't try to make md arrays dirty if that is not meaningful. Arrays personalities such as 'raid0' and 'linear' have no redundancy, and so marking them as 'clean' or 'dirty' is not meaningful. So always allow write requests without requiring a superblock update. Such arrays types are detected by ->sync_request being NULL. If it is not possible to send a sync request we don't need a 'dirty' flag because all a dirty flag does is trigger some sync_requests. Signed-off-by: Neil Brown --- drivers/md/md.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/md/md.c b/drivers/md/md.c index 97852099defd..9e3ce432e37e 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -5536,6 +5536,8 @@ void md_allow_write(mddev_t *mddev) return; if (mddev->ro) return; + if (!mddev->pers->sync_request) + return; spin_lock_irq(&mddev->write_lock); if (mddev->in_sync) { -- 2.30.2