The patch 7ee06ddc4038f936b0d4459d37a7d4d844fb03db ("dm snapshot: fix a
crash when an origin has no snapshots") introduced a regression in
snapshot merging - the test lvcreate-cache-snapshot.sh got stuck in an
infinite loop.
This patch reverts it.
Signed-off-by: Mikulas Patocka <mpatocka@xxxxxxxxxx>
Index: linux-2.6/drivers/md/dm-snap.c
===================================================================
--- linux-2.6.orig/drivers/md/dm-snap.c
+++ linux-2.6/drivers/md/dm-snap.c
@@ -855,11 +855,12 @@ static int dm_add_exception(void *contex
static uint32_t __minimum_chunk_size(struct origin *o)
{
struct dm_snapshot *snap;
- unsigned chunk_size = rounddown_pow_of_two(UINT_MAX);
+ unsigned chunk_size = 0;
if (o)
list_for_each_entry(snap, &o->snapshots, list)
- chunk_size = min(chunk_size, snap->store->chunk_size);
+ chunk_size = min_not_zero(chunk_size,
+ snap->store->chunk_size);
return (uint32_t) chunk_size;
}
--
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