Re: [PATCH 1/1] mlock: split the shmlock_user_lock spinlock into per user_struct spinlock

Rik van Riel
2012-05-03T18:07:23Z

On 05/03/2012 01:34 PM, rajman mekaco wrote:
> The user_shm_lock and user_shm_unlock functions use a single global
> spinlock for protecting the user->locked_shm.
>
> This is an overhead for multiple CPUs calling this code even if they
> are having different user_struct.
>
> Remove the global shmlock_user_lock and introduce and use a new
> spinlock inside of the user_struct structure.
>
> Signed-off-by: rajman mekaco<rajman.mekaco@gmail.com>

Reviewed-by: Rik van Riel <riel@redhat.com>