linux-kernel - Re: [RFC 02/26] mm, slub: allocate private object map for validate_slab

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Message-ID: <alpine.DEB.2.22.394.2105251008560.107680@gentwo.de>
Date:   Tue, 25 May 2021 10:09:15 +0200 (CEST)
From:   Christoph Lameter <cl@...two.de>
To:     Vlastimil Babka <vbabka@...e.cz>
cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        David Rientjes <rientjes@...gle.com>,
        Pekka Enberg <penberg@...nel.org>,
        Joonsoo Kim <iamjoonsoo.kim@....com>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Thomas Gleixner <tglx@...utronix.de>,
        Mel Gorman <mgorman@...hsingularity.net>,
        Jesper Dangaard Brouer <brouer@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Jann Horn <jannh@...gle.com>
Subject: Re: [RFC 02/26] mm, slub: allocate private object map for
 validate_slab_cache()

On Tue, 25 May 2021, Vlastimil Babka wrote:

> validate_slab_cache() is called either to handle a sysfs write, or from a
> self-test context. In both situations it's straightforward to preallocate a
> private object bitmap instead of grabbing the shared static one meant for
> critical sections, so let's do that.

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