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[PATCH] make "struct d_cookie" depend on CONFIG_PROFILING

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Shrinks "struct dentry" from 128 bytes to 124 on x86, allowing 31 objects
per slab instead of 30.

Cc: John Levon <levon@movementarian.org>
Cc: Philippe Elie <phil.el@wanadoo.fr>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Marcelo Tosatti 2006-02-03 03:04:06 -08:00 • committed by Linus Torvalds
parent 09114eb8c5
commit 47ba87e0b1
2 changed files with 4 additions and 0 deletions
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2
fs/dcache.c
View file

@ -743,7 +743,9 @@ struct dentry *d_alloc(struct dentry * parent, const struct qstr *name)
dentry->d_op = NULL; dentry->d_op = NULL;
dentry->d_fsdata = NULL; dentry->d_fsdata = NULL;
dentry->d_mounted = 0; dentry->d_mounted = 0;
#ifdef CONFIG_PROFILING
dentry->d_cookie = NULL; dentry->d_cookie = NULL;
#endif
INIT_HLIST_NODE(&dentry->d_hash); INIT_HLIST_NODE(&dentry->d_hash);
INIT_LIST_HEAD(&dentry->d_lru); INIT_LIST_HEAD(&dentry->d_lru);
INIT_LIST_HEAD(&dentry->d_subdirs); INIT_LIST_HEAD(&dentry->d_subdirs);

2
include/linux/dcache.h
View file

@ -108,7 +108,9 @@ struct dentry {
struct dentry_operations *d_op; struct dentry_operations *d_op;
struct super_block *d_sb; /* The root of the dentry tree */ struct super_block *d_sb; /* The root of the dentry tree */
void *d_fsdata; /* fs-specific data */ void *d_fsdata; /* fs-specific data */
#ifdef CONFIG_PROFILING
struct dcookie_struct *d_cookie; /* cookie, if any */ struct dcookie_struct *d_cookie; /* cookie, if any */
#endif
int d_mounted; int d_mounted;
unsigned char d_iname[DNAME_INLINE_LEN_MIN]; /* small names */ unsigned char d_iname[DNAME_INLINE_LEN_MIN]; /* small names */
}; };