Re: [PATCH 07/13] memcontrol: schedule throttling if we are congested

From: Tejun Heo
Date: Tue Jun 05 2018 - 16:46:33 EST

On Tue, Jun 05, 2018 at 09:29:42AM -0400, Josef Bacik wrote:
> From: Tejun Heo <tj@xxxxxxxxxx>
> Memory allocations can induce swapping via kswapd or direct reclaim. If
> we are having IO done for us by kswapd and don't actually go into direct
> reclaim we may never get scheduled for throttling. So instead check to
> see if our cgroup is congested, and if so schedule the throttling.
> Before we return to user space the throttling stuff will only throttle
> if we actually required it.
> Signed-off-by: Tejun Heo <tj@xxxxxxxxxx>

Acked-by: Tejun Heo <tj@xxxxxxxxxx>