Re: [PATCH] proc: faster /proc/$PID lookup

On Fri, Jun 13, 2014 at 11:03:38PM +0300, Alexey Dobriyan wrote: > static struct dentry *proc_root_lookup(struct inode * dir, struct dentry * > dentry, unsigned int flags) > { > - if (!proc_lookup(dir, dentry, flags)) > - return NULL; > - > - return proc_pid_lookup(dir,

[PATCH] proc: faster /proc/$PID lookup

Use first character as a hint for /proc/$PID lookup. Currently it takes one spinlock and search through dozens of misc proc entries which can not match /proc/$PID. Signed-off-by: Alexey Dobriyan --- fs/proc/root.c | 15 +++ 1 file changed, 11 insertions(+), 4 deletions(-) --- a/