Re: [PATCH v9 4/7] mm: Change count_objcg_event() to count_objcg_events() for batch event updates.

[Johannes Weiner]

On Mon, Sep 30, 2024 at 03:12:18PM -0700, Kanchana P Sridhar wrote:
> With the introduction of zswap_store() swapping out large folios,
> we need to efficiently update the objcg's memcg events once per
> successfully stored folio. For instance, the 'ZSWPOUT' event needs
> to be incremented by folio_nr_pages().
> 
> To facilitate this, the existing count_objcg_event() API is modified
> to be count_objcg_events() that additionally accepts a count parameter.
> The only existing calls to count_objcg_event() are in zswap.c - these
> have been modified to call count_objcg_events() with a count of 1.
> 
> Signed-off-by: Kanchana P Sridhar <kanchana.p.sridhar@xxxxxxxxx>

Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx>