Re: [patch 01/12] mm: oom_kill: remove unnecessary locking in oom_enable()

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Wed 25-03-15 02:17:05, Johannes Weiner wrote:
> Setting oom_killer_disabled to false is atomic, there is no need for
> further synchronization with ongoing allocations trying to OOM-kill.

True, races with an ongoing allocations are not harmful.

> Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx>

Acked-by: Michal Hocko <mhocko@xxxxxxx>

> ---
>  mm/oom_kill.c | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/mm/oom_kill.c b/mm/oom_kill.c
> index 2b665da1b3c9..73763e489e86 100644
> --- a/mm/oom_kill.c
> +++ b/mm/oom_kill.c
> @@ -488,9 +488,7 @@ bool oom_killer_disable(void)
>   */
>  void oom_killer_enable(void)
>  {
> -	down_write(&oom_sem);
>  	oom_killer_disabled = false;
> -	up_write(&oom_sem);
>  }
>  
>  #define K(x) ((x) << (PAGE_SHIFT-10))
> -- 
> 2.3.3
> 
> --
> To unsubscribe, send a message with 'unsubscribe linux-mm' in
> the body to majordomo@xxxxxxxxx.  For more info on Linux MM,
> see: http://www.linux-mm.org/ .
> Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>

-- 
Michal Hocko
SUSE Labs
--
To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html




[Index of Archives]     [Linux Ext4 Filesystem]     [Union Filesystem]     [Filesystem Testing]     [Ceph Users]     [Ecryptfs]     [AutoFS]     [Kernel Newbies]     [Share Photos]     [Security]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux Cachefs]     [Reiser Filesystem]     [Linux RAID]     [Samba]     [Device Mapper]     [CEPH Development]
  Powered by Linux