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authorJens Axboe <jens.axboe@oracle.com>2009-12-16 09:16:41 +0100
committerJens Axboe <jens.axboe@oracle.com>2009-12-16 09:16:41 +0100
commitb568be627a7270eba575bc4406a606e1545f91bb (patch)
tree1afa91fcd56f9ec77ccf1063d79aa2664675c193 /block
parent8bea8672edfca7ec5f661cafb218f1205863b343 (diff)
downloadlinux-2.6.34-ux500-b568be627a7270eba575bc4406a606e1545f91bb.tar.gz
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')
-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 dd1f1e0e196..6ae118d6e19 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,
ret = -1;
}
+ /*
+ * Temporarily disable discard granularity. It's currently buggy
+ * since we default to 0 for discard_granularity, hence this
+ * "failure" will always trigger for non-zero offsets.
+ */
+#if 0
if (offset &&
(offset & (b->discard_granularity - 1)) != b->discard_alignment) {
t->discard_misaligned = 1;
ret = -1;
}
+#endif
/* If top has no alignment offset, inherit from bottom */
if (!t->alignment_offset)