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dm thin: reduce endio_hook pool size 

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>
This commit is contained in:
Alasdair G Kergon 2012-07-27 15:07:57 +01:00
parent bdc0077af5
commit 7768ed33cc
1 changed files with 1 additions and 1 deletions
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2
drivers/md/dm-thin.c
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@ -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