Re: [PATCH bpf-next v4 01/30] mm: support nesting memalloc_use_memcg()

[Shakeel Butt]

On Fri, Aug 21, 2020 at 8:01 AM Roman Gushchin <guro@xxxxxx> wrote:
>
> From: Johannes Weiner <hannes@xxxxxxxxxxx>
>
> Support nesting of memalloc_use_memcg() to be able to use
> from an interrupt context.
>
> Make memalloc_use_memcg() return the old memcg and convert existing
> users to a stacking model. Delete the unused memalloc_unuse_memcg().
>
> Roman: I've rephrased the original commit log, because it was
> focused on the accounting problem related to loop devices. I made
> it less specific, so it can work for bpf too. Also rebased to the
> current state of the mm tree.
>
> The original patch can be found here:
> https://lkml.org/lkml/2020/5/28/806
>
> Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx>
> Signed-off-by: Roman Gushchin <guro@xxxxxx>

Reviewed-by: Shakeel Butt <shakeelb@xxxxxxxxxx>