linux-kernel - Re: [PATCH 4/5] mm: rework non-root kmem

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Message-ID: <0100016a30a83bcf-7f99039c-77ec-4c48-a1c4-92e398f8f185-000000@email.amazonses.com>
Date:   Thu, 18 Apr 2019 13:34:52 +0000
From:   Christopher Lameter <cl@...ux.com>
To:     Roman Gushchin <guroan@...il.com>
cc:     Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, kernel-team@...com,
        Johannes Weiner <hannes@...xchg.org>,
        Michal Hocko <mhocko@...nel.org>,
        Rik van Riel <riel@...riel.com>, david@...morbit.com,
        Pekka Enberg <penberg@...nel.org>,
        Vladimir Davydov <vdavydov.dev@...il.com>,
        cgroups@...r.kernel.org, Roman Gushchin <guro@...com>
Subject: Re: [PATCH 4/5] mm: rework non-root kmem_cache lifecycle
 management

On Wed, 17 Apr 2019, Roman Gushchin wrote:

> Let's make every page to hold a reference to the kmem_cache (we
> already have a stable pointer), and make kmem_caches to hold a single
> reference to the memory cgroup.

Ok you are freeing one word in the page struct that can be used for other
purposes now?