linux-kernel - Re: [patch] mm, slab: avoid high-order slab pages when it does not reduce waste

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Message-ID: <0100016682ad79b9-b1dafb6b-98e2-4d43-835d-fded2028840d-000000@email.amazonses.com>
Date:   Wed, 17 Oct 2018 15:38:19 +0000
From:   Christopher Lameter <cl@...ux.com>
To:     Vlastimil Babka <vbabka@...e.cz>
cc:     David Rientjes <rientjes@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Pekka Enberg <penberg@...nel.org>,
        Joonsoo Kim <iamjoonsoo.kim@....com>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [patch] mm, slab: avoid high-order slab pages when it does not
 reduce waste

On Wed, 17 Oct 2018, Vlastimil Babka wrote:

> I.e. the benefits vs drawbacks of higher order allocations for SLAB are
> out of scope here. It would be nice if somebody evaluated them, but the
> potential resulting change would be much larger than what concerns this
> patch. But it would arguably also make SLAB more like SLUB, which you
> already questioned at some point...

Well if this leads to more code going into mm/slab_common.c then I would
certainly welcome that.