From: Alasdair G Kergon Reduce the slab size used for the dm_thin_endio_hook mempool. Allocation has been seen to fail on machines with smaller amounts of memory due to fragmentation. lvm: page allocation failure. order:5, mode:0xd0 device-mapper: table: 253:38: thin-pool: Error creating pool's endio_hook mempool Cc: stable@vger.kernel.org Signed-off-by: Alasdair G Kergon --- drivers/md/dm-thin.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) Index: linux-3.5/drivers/md/dm-thin.c =================================================================== --- linux-3.5.orig/drivers/md/dm-thin.c +++ linux-3.5/drivers/md/dm-thin.c @@ -19,7 +19,7 @@ /* * Tunable constants */ -#define ENDIO_HOOK_POOL_SIZE 10240 +#define ENDIO_HOOK_POOL_SIZE 1024 #define DEFERRED_SET_SIZE 64 #define MAPPING_POOL_SIZE 1024 #define PRISON_CELLS 1024