[dm-devel] [PATCH] dm-writecace: if we are suspended, interrupt flushing

[Mikulas Patocka]

Hi

This is another writecache patch, intended for the next merge window.

Mikulas



From: Mikulas Patocka <mpatocka at redhat.com>

If we are suspended, we want to interrupt the flushing sequence, so that
there is no excessive suspend delay.

Signed-off-by: Mikulas Patocka <mpatocka at redhat.com>
Cc: stable at vger.kernel.org

Index: linux-2.6/drivers/md/dm-writecache.c
===================================================================
--- linux-2.6.orig/drivers/md/dm-writecache.c
+++ linux-2.6/drivers/md/dm-writecache.c
@@ -1844,8 +1844,9 @@ restart:
 
 		n_walked++;
 		if (unlikely(n_walked > WRITEBACK_LATENCY) &&
-		    likely(!wc->writeback_all) && likely(!dm_suspended(wc->ti))) {
-			queue_work(wc->writeback_wq, &wc->writeback_work);
+		    likely(!wc->writeback_all)) {
+			if (likely(!dm_suspended(wc->ti)))
+				queue_work(wc->writeback_wq, &wc->writeback_work);
 			break;
 		}