linux-kernel - Re: [PATCH v3 3/7] mm, slab: allocate off-slab freelists as reclaimable when appropriate

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Message-ID: <01000164ebdd3863-bc2d38db-9d61-442f-a2e4-6196106d5ce4-000000@email.amazonses.com>
Date:   Mon, 30 Jul 2018 15:45:01 +0000
From:   Christopher Lameter <cl@...ux.com>
To:     Vlastimil Babka <vbabka@...e.cz>
cc:     Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, linux-api@...r.kernel.org,
        Roman Gushchin <guro@...com>, Michal Hocko <mhocko@...nel.org>,
        Johannes Weiner <hannes@...xchg.org>,
        David Rientjes <rientjes@...gle.com>,
        Joonsoo Kim <iamjoonsoo.kim@....com>,
        Mel Gorman <mgorman@...hsingularity.net>,
        Matthew Wilcox <willy@...radead.org>
Subject: Re: [PATCH v3 3/7] mm, slab: allocate off-slab freelists as reclaimable
 when appropriate

On Wed, 18 Jul 2018, Vlastimil Babka wrote:

> In SLAB, OFF_SLAB caches allocate management structures (currently just the
> freelist) from kmalloc caches when placement in a slab page together with
> objects would lead to suboptimal memory usage. For SLAB_RECLAIM_ACCOUNT caches,
> we can allocate the freelists from the newly introduced reclaimable kmalloc
> caches, because shrinking the OFF_SLAB cache will in general result to freeing
> of the freelists as well. This should improve accounting and anti-fragmentation
> a bit.

Acked-by: Christoph Lameter <cl@...ux.com>