[Devel] [PATCH rh7] mm/workingset: Fix workingset_activation() with disabled mem cgroups.

[Andrey Ryabinin]

On 5/28/19 7:06 PM, Konstantin Khorenko wrote:
> When mem cgroups are disabled in workingset_activation()
> lookup_page_cgroup() can return NULL and trigger crash on next step on
> page bit check.
> 
> Fixes: f6a8b015027e ("ms/mm: workingset: per-cgroup cache
> thrash detection")
> 
> Signed-off-by: Konstantin Khorenko <khorenko at virtuozzo.com>
> ---

Ack