This is a note to let you know that I've just added the patch titled
dm thin: reduce endio_hook pool size
to the 3.5-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
dm-thin-reduce-endio_hook-pool-size.patch
and it can be found in the queue-3.5 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 7768ed33ccdc02801c4483fc5682dc66ace14aea Mon Sep 17 00:00:00 2001
From: Alasdair G Kergon <[email protected]>
Date: Fri, 27 Jul 2012 15:07:57 +0100
Subject: dm thin: reduce endio_hook pool size
From: Alasdair G Kergon <[email protected]>
commit 7768ed33ccdc02801c4483fc5682dc66ace14aea upstream.
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
Signed-off-by: Alasdair G Kergon <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/md/dm-thin.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/md/dm-thin.c
+++ b/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
Patches currently in stable-queue which might be from [email protected] are
queue-3.5/dm-thin-fix-memory-leak-in-process_prepared_mapping-error-paths.patch
queue-3.5/dm-thin-reduce-endio_hook-pool-size.patch
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