Re: [PATCH 2/2] proc: faster /proc/$PID lookup

From: Alexey Dobriyan
Date: Tue Jul 08 2014 - 17:50:35 EST

On Wed, Jul 09, 2014 at 12:45:57AM +0300, Alexey Dobriyan wrote:
> Currently lookup for /proc/$PID first goes through spinlock and
> whole list of misc /proc entries only to confirm that, yes,
> /proc/42 can not possibly match random proc entry.
> List is is several dozens entries long (52 entries on my setup).
> None of this is necessary.
> Try to convert dentry name to integer first.
> If it works, it must be /proc/$PID.
> If it doesn't, it must be random proc entry.

Recycled from Al Viro's patch as well!
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at