Messages in this thread Patch in this message | | | Subject | fs: remove 8 bytes of padding from block_device on 64bit builds | From | Richard Kennedy <> | Date | Mon, 14 Feb 2011 16:39:26 +0000 |
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Re-ordering struct block_inode to remove 8 bytes of padding on 64 bit builds, which also shrinks bdev_inode by 8 bytes (776 -> 768) allowing it to fit into one fewer cache lines.
Signed-off-by: Richard Kennedy <richard@rsk.demon.co.uk> ------ patch against v2.6.38-rc4 compiled & tested on x86_64
regards Richard
diff --git a/include/linux/fs.h b/include/linux/fs.h index bd32159..7c65780 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -658,9 +658,9 @@ struct address_space { struct block_device { dev_t bd_dev; /* not a kdev_t - it's a search key */ + int bd_openers; struct inode * bd_inode; /* will die */ struct super_block * bd_super; - int bd_openers; struct mutex bd_mutex; /* open/close mutex */ struct list_head bd_inodes; void * bd_claiming;
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