Commit 47ba87e0 authored by Marcelo Tosatti's avatar Marcelo Tosatti Committed by Linus Torvalds
Browse files

[PATCH] make "struct d_cookie" depend on CONFIG_PROFILING 



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: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 09114eb8

fs/dcache.c

+2 −0
Original line number Diff line number Diff line
@@ -743,7 +743,9 @@ struct dentry *d_alloc(struct dentry * parent, const struct qstr *name) 
	dentry->d_op = NULL;

	dentry->d_fsdata = NULL;

	dentry->d_mounted = 0;

#ifdef CONFIG_PROFILING

	dentry->d_cookie = NULL;

#endif

	INIT_HLIST_NODE(&dentry->d_hash);

	INIT_LIST_HEAD(&dentry->d_lru);

	INIT_LIST_HEAD(&dentry->d_subdirs);

include/linux/dcache.h

+2 −0
Original line number Diff line number Diff line
@@ -108,7 +108,9 @@ struct dentry { 
	struct dentry_operations *d_op;

	struct super_block *d_sb;	/* The root of the dentry tree */

	void *d_fsdata;			/* fs-specific data */

#ifdef CONFIG_PROFILING

	struct dcookie_struct *d_cookie; /* cookie, if any */

#endif

	int d_mounted;

	unsigned char d_iname[DNAME_INLINE_LEN_MIN];	/* small names */

};