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| author |   Richard Kennedy <richard@rsk.demon.co.uk> | 2010-02-26 14:00:43 +0100 |
|---|---|---|
| committer |   Jens Axboe <jens.axboe@oracle.com> | 2010-02-26 14:00:43 +0100 |
| commit | 58c24a61614f5da290068e47fc5ec65370eb61dd (patch) | |
| tree | ae8f51cef37239a4ebe12379deca7042680161c1 /include/linux/iocontext.h | |
| parent | cfq: Remove useless css reference get (diff) | |
| download | linux-dev-58c24a61614f5da290068e47fc5ec65370eb61dd.tar.xz linux-dev-58c24a61614f5da290068e47fc5ec65370eb61dd.zip | |
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.h | 2 |
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; |