dm thin: reduce endio_hook pool size
authorAlasdair G Kergon <agk@redhat.com>
Fri, 27 Jul 2012 14:07:57 +0000 (15:07 +0100)
committerAlasdair G Kergon <agk@redhat.com>
Fri, 27 Jul 2012 14:07:57 +0000 (15:07 +0100)
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 <agk@redhat.com>
drivers/md/dm-thin.c

index 68694da0d21d0566a61649339cb3a4f3a3bbc943..18f87b0def1266eac12bf798ed036b4aa8e8f4ce 100644 (file)
@@ -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