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SubjectRe: [PATCH v2 3/4] mm: introduce page memcg flags
On Thu, Sep 24, 2020 at 12:29 PM Roman Gushchin <guro@fb.com> wrote:
>
> The lowest bit in page->memcg_data is used to distinguish between
> struct memory_cgroup pointer and a pointer to a objcgs array.
> All checks and modifications of this bit are open-coded.
>
> Let's formalize it using page memcg flags, defined in page_memcg_flags
> enum, and replace all open-coded accesses with test_bit()/__set_bit().
>
> Additional flags might be added later.
>
> Signed-off-by: Roman Gushchin <guro@fb.com>

Thanks.

Reviewed-by: Shakeel Butt <shakeelb@google.com>

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