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authorEric W. Biederman <ebiederm@xmission.com>2007-02-14 03:34:12 -0500
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-02-14 11:10:00 -0500
commit77b14db502cb85a031fe8fde6c85d52f3e0acb63 (patch)
tree4201f6a4dfe1062d1dc00659c403d630401b87cc /fs/proc/inode.c
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 'fs/proc/inode.c')
-rw-r--r--fs/proc/inode.c1
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,
161 if (!inode) 161 if (!inode)
162 goto out_ino; 162 goto out_ino;
163 163
164 PROC_I(inode)->fd = 0;
164 PROC_I(inode)->pde = de; 165 PROC_I(inode)->pde = de;
165 if (de) { 166 if (de) {
166 if (de->mode) { 167 if (de->mode) {