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| author |   Theodore Ts'o <tytso@mit.edu> | 2006-09-27 01:50:31 -0700 |
|---|---|---|
| committer |   Steven Whitehouse <swhiteho@redhat.com> | 2006-09-28 08:32:24 -0400 |
| commit | bba9dfd83587017de1c55a94c077983e0dfa0251 (patch) | |
| tree | 8af76134269374850dea490ee1020cb92f4fdb9b /fs/gfs2/inode.c | |
| parent | Merge branch 'master' into gfs2 (diff) | |
| download | linux-dev-bba9dfd83587017de1c55a94c077983e0dfa0251.tar.xz linux-dev-bba9dfd83587017de1c55a94c077983e0dfa0251.zip | |
[GFS2] inode_diet: Replace inode.u.generic_ip with inode.i_private (gfs)
The following patches reduce the size of the VFS inode structure by 28 bytes
on a UP x86. (It would be more on an x86_64 system). This is a 10% reduction
in the inode size on a UP kernel that is configured in a production mode
(i.e., with no spinlock or other debugging functions enabled; if you want to
save memory taken up by in-core inodes, the first thing you should do is
disable the debugging options; they are responsible for a huge amount of bloat
in the VFS inode structure).
This patch:
The filesystem or device-specific pointer in the inode is inside a union,
which is pretty pointless given that all 30+ users of this field have been
using the void pointer. Get rid of the union and rename it to i_private, with
a comment to explain who is allowed to use the void pointer. This is just a
cleanup, but it allows us to reuse the union 'u' for something something where
the union will actually be used.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: Steven Whitehouse <swhiteho@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Diffstat (limited to 'fs/gfs2/inode.c')
| -rw-r--r-- | fs/gfs2/inode.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c index ac9535be304f..784d145058cb 100644 --- a/fs/gfs2/inode.c +++ b/fs/gfs2/inode.c @@ -160,7 +160,7 @@ struct inode *gfs2_inode_lookup(struct super_block *sb, struct gfs2_inum *inum, if (inode->i_state & I_NEW) { struct gfs2_sbd *sdp = GFS2_SB(inode); umode_t mode = DT2IF(type); - inode->u.generic_ip = ip; + inode->i_private = ip; inode->i_mode = mode; if (S_ISREG(mode)) { |