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| 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 /fs/proc/inode.c | |
| parent | 1ff007eb8e8c7c44e9a384a67d0fdd0fd06ba811 (diff) | |
| download | linux-77b14db502cb85a031fe8fde6c85d52f3e0acb63.tar.gz linux-77b14db502cb85a031fe8fde6c85d52f3e0acb63.tar.bz2 linux-77b14db502cb85a031fe8fde6c85d52f3e0acb63.zip | |
[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 'fs/proc/inode.c')
| -rw-r--r-- | fs/proc/inode.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/proc/inode.c b/fs/proc/inode.c index f6722be37dde..c372eb151a3a 100644 --- a/fs/proc/inode.c +++ b/fs/proc/inode.c @@ -161,6 +161,7 @@ struct inode *proc_get_inode(struct super_block *sb, unsigned int ino, if (!inode) goto out_ino; + PROC_I(inode)->fd = 0; PROC_I(inode)->pde = de; if (de) { if (de->mode) { |