diff options
| author | Eric W. Biederman <ebiederm@xmission.com> | 2007-02-14 00:34:12 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-02-14 08:10:00 -0800 |
| commit | 77b14db502cb85a031fe8fde6c85d52f3e0acb63 (patch) | |
| tree | 4201f6a4dfe1062d1dc00659c403d630401b87cc /include/linux/sysctl.h | |
| parent | 1ff007eb8e8c7c44e9a384a67d0fdd0fd06ba811 (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.h | 2 |
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, |