Re: todays git regression (2.6.32-04008.g3ff6a46): lot of device mapper warnings

["Martin K. Petersen" <martin.petersen@oracle.com>]

>>>>> "Jens" == Jens Axboe <jens.axboe@oracle.com> writes:

Jens> I'll revert the bad commit tomorrow so that -rc1 wont be affected,
Jens> at least.

I'm pretty close to having a new stacking algorithm that works.  If I
don't have it ready by tomorrow maybe we should commit the following
patch instead of reverting the discard changes wholesale?

diff --git a/block/blk-settings.c b/block/blk-settings.c
index dd1f1e0..65ae861 100644
--- a/block/blk-settings.c
+++ b/block/blk-settings.c
@@ -555,10 +555,8 @@ int blk_stack_limits(struct queue_limits *t, struct queue_limits *b,
 	}
 
 	if (offset &&
-	    (offset & (b->discard_granularity - 1)) != b->discard_alignment) {
+	    (offset & (b->discard_granularity - 1)) != b->discard_alignment)
 		t->discard_misaligned = 1;
-		ret = -1;
-	}
 
 	/* If top has no alignment offset, inherit from bottom */
 	if (!t->alignment_offset)