Re: [PATCH v2 5/5] mm: workingset: per-cgroup cache thrash detection

[Vladimir Davydov]

On Fri, Jan 29, 2016 at 12:54:07PM -0500, Johannes Weiner wrote:
> Cache thrash detection (see a528910e12ec "mm: thrash detection-based
> file cache sizing" for details) currently only works on the system
> level, not inside cgroups. Worse, as the refaults are compared to the
> global number of active cache, cgroups might wrongfully get all their
> refaults activated when their pages are hotter than those of others.
> 
> Move the refault machinery from the zone to the lruvec, and then tag
> eviction entries with the memcg ID. This makes the thrash detection
> work correctly inside cgroups.
> 
> Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx>

Reviewed-by: Vladimir Davydov <vdavydov@xxxxxxxxxxxxx>