Commit 1a0fd497 authored Jun 28, 2008 by Neil Brown

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 <neilb@suse.de>

parent f48ed538

drivers/md/md.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -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) {