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authorJens Axboe <jens.axboe@oracle.com>2009-12-16 03:16:41 -0500
committerJens Axboe <jens.axboe@oracle.com>2009-12-16 03:16:41 -0500
commitb568be627a7270eba575bc4406a606e1545f91bb (patch)
tree1afa91fcd56f9ec77ccf1063d79aa2664675c193 /block/blk-settings.c
parent8bea8672edfca7ec5f661cafb218f1205863b343 (diff)
block: temporarily disable discard granularity
Commit 86b37281411cf1e9bc0a6b5406c45edb7bd9ea5d adds a check for misaligned stacking offsets, but it's buggy since the defaults are 0. Hence all dm devices that pass in a non-zero starting offset will be marked as misaligned amd dm will complain. A real fix is coming, in the mean time disable the discard granularity check so that users don't worry about dm reporting about misaligned devices. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'block/blk-settings.c')
-rw-r--r--block/blk-settings.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/block/blk-settings.c b/block/blk-settings.c
index dd1f1e0e196f..6ae118d6e193 100644
--- a/block/blk-settings.c
+++ b/block/blk-settings.c
@@ -554,11 +554,18 @@ int blk_stack_limits(struct queue_limits *t, struct queue_limits *b,
554 ret = -1; 554 ret = -1;
555 } 555 }
556 556
557 /*
558 * Temporarily disable discard granularity. It's currently buggy
559 * since we default to 0 for discard_granularity, hence this
560 * "failure" will always trigger for non-zero offsets.
561 */
562#if 0
557 if (offset && 563 if (offset &&
558 (offset & (b->discard_granularity - 1)) != b->discard_alignment) { 564 (offset & (b->discard_granularity - 1)) != b->discard_alignment) {
559 t->discard_misaligned = 1; 565 t->discard_misaligned = 1;
560 ret = -1; 566 ret = -1;
561 } 567 }
568#endif
562 569
563 /* If top has no alignment offset, inherit from bottom */ 570 /* If top has no alignment offset, inherit from bottom */
564 if (!t->alignment_offset) 571 if (!t->alignment_offset)