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authorRichard Kennedy <richard@rsk.demon.co.uk>2010-02-26 14:00:43 +0100
committerJens Axboe <jens.axboe@oracle.com>2010-02-26 14:00:43 +0100
commit58c24a61614f5da290068e47fc5ec65370eb61dd (patch)
treeae8f51cef37239a4ebe12379deca7042680161c1 /include/linux/iocontext.h
parent024f9066165ffe9c8284431c78adcbcddd309831 (diff)
downloadlinux-linaro-stable-58c24a61614f5da290068e47fc5ec65370eb61dd.tar.gz
block: remove padding from io_context on 64bit builds
On 64 bit builds when CONFIG_BLK_CGROUP=n (the default) this removes 8 bytes of padding from structure io_context and drops its size from 72 to 64 bytes, so needing one fewer cachelines and allowing more objects per slab in it's kmem_cache. Signed-off-by: Richard Kennedy <richard@rsk.demon.co.uk> ---- patch against 2.6.33 compiled & test on x86_64 AMDX2 regards Richard Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'include/linux/iocontext.h')
-rw-r--r--include/linux/iocontext.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/iocontext.h b/include/linux/iocontext.h
index 78ef023227d4..1195a806fe0c 100644
--- a/include/linux/iocontext.h
+++ b/include/linux/iocontext.h
@@ -49,8 +49,8 @@ struct io_context {
/*
* For request batching
*/
- unsigned long last_waited; /* Time last woken after wait for request */
int nr_batch_requests; /* Number of requests left in the batch */
+ unsigned long last_waited; /* Time last woken after wait for request */
struct radix_tree_root radix_root;
struct hlist_head cic_list;