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authorTheodore Ts'o <tytso@mit.edu>2006-09-27 04:50:31 -0400
committerSteven Whitehouse <swhiteho@redhat.com>2006-09-28 08:32:24 -0400
commitbba9dfd83587017de1c55a94c077983e0dfa0251 (patch)
tree8af76134269374850dea490ee1020cb92f4fdb9b /fs/dlm
parent185a257f2f73bcd89050ad02da5bedbc28fc43fa (diff)
[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/dlm')
-rw-r--r--fs/dlm/debug_fs.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/dlm/debug_fs.c b/fs/dlm/debug_fs.c
index 9c3aeddc8667..ca94a837a5bb 100644
--- a/fs/dlm/debug_fs.c
+++ b/fs/dlm/debug_fs.c
@@ -282,7 +282,7 @@ static int rsb_open(struct inode *inode, struct file *file)
282 return ret; 282 return ret;
283 283
284 seq = file->private_data; 284 seq = file->private_data;
285 seq->private = inode->u.generic_ip; 285 seq->private = inode->i_private;
286 286
287 return 0; 287 return 0;
288} 288}
@@ -301,7 +301,7 @@ static struct file_operations rsb_fops = {
301 301
302static int waiters_open(struct inode *inode, struct file *file) 302static int waiters_open(struct inode *inode, struct file *file)
303{ 303{
304 file->private_data = inode->u.generic_ip; 304 file->private_data = inode->i_private;
305 return 0; 305 return 0;
306} 306}
307 307