fs: inode - remove 8 bytes of padding on 64bits allowing 1 more objects/slab under...
Richard Kennedy [Mon, 15 Feb 2010 11:16:11 +0000 (11:16 +0000)]
This removes 8 bytes of padding from struct inode on 64bit builds, and
so allows 1 more object/slab in the inode_cache when using slub.

Signed-off-by: Richard Kennedy <richard@rsk.demon.co.uk>
----
patch against 2.6.33-rc8
compiled & tested on x86_64 AMDX2

I've been running this patch for over a week with no obvious problems
regards
Richard
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

include/linux/fs.h

index b1bcb27..ebb1cd5 100644 (file)
@@ -729,6 +729,7 @@ struct inode {
        uid_t                   i_uid;
        gid_t                   i_gid;
        dev_t                   i_rdev;
+       unsigned int            i_blkbits;
        u64                     i_version;
        loff_t                  i_size;
 #ifdef __NEED_I_SIZE_ORDERED
@@ -738,7 +739,6 @@ struct inode {
        struct timespec         i_mtime;
        struct timespec         i_ctime;
        blkcnt_t                i_blocks;
-       unsigned int            i_blkbits;
        unsigned short          i_bytes;
        umode_t                 i_mode;
        spinlock_t              i_lock; /* i_blocks, i_bytes, maybe i_size */