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authorEric W. Biederman <ebiederm@xmission.com>2007-02-14 00:34:12 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-02-14 08:10:00 -0800
commit77b14db502cb85a031fe8fde6c85d52f3e0acb63 (patch)
tree4201f6a4dfe1062d1dc00659c403d630401b87cc /include/linux/sysctl.h
parent1ff007eb8e8c7c44e9a384a67d0fdd0fd06ba811 (diff)
[PATCH] sysctl: reimplement the sysctl proc support
With this change the sysctl inodes can be cached and nothing needs to be done when removing a sysctl table. For a cost of 2K code we will save about 4K of static tables (when we remove de from ctl_table) and 70K in proc_dir_entries that we will not allocate, or about half that on a 32bit arch. The speed feels about the same, even though we can now cache the sysctl dentries :( We get the core advantage that we don't need to have a 1 to 1 mapping between ctl table entries and proc files. Making it possible to have /proc/sys vary depending on the namespace you are in. The currently merged namespaces don't have an issue here but the network namespace under /proc/sys/net needs to have different directories depending on which network adapters are visible. By simply being a cache different directories being visible depending on who you are is trivial to implement. [akpm@osdl.org: fix uninitialised var] [akpm@osdl.org: fix ARM build] [bunk@stusta.de: make things static] Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/sysctl.h')
-rw-r--r--include/linux/sysctl.h2
1 files changed, 0 insertions, 2 deletions
diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h
index 9698ac30f553..89150494bd10 100644
--- a/include/linux/sysctl.h
+++ b/include/linux/sysctl.h
@@ -930,8 +930,6 @@ extern struct ctl_table_header *sysctl_head_next(struct ctl_table_header *prev);
extern void sysctl_head_finish(struct ctl_table_header *prev);
extern int sysctl_perm(struct ctl_table *table, int op);
-extern void sysctl_init(void);
-
typedef struct ctl_table ctl_table;
typedef int ctl_handler (ctl_table *table, int __user *name, int nlen,