linux-kernel - Re: [PATCH] mm/slub: add missing TID updates on slab deactivation

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Message-ID: <alpine.DEB.2.22.394.2206091358040.566833@gentwo.de>
Date:   Thu, 9 Jun 2022 13:58:47 +0200 (CEST)
From:   Christoph Lameter <cl@...two.de>
To:     Jann Horn <jannh@...gle.com>
cc:     Pekka Enberg <penberg@...nel.org>,
        David Rientjes <rientjes@...gle.com>,
        Joonsoo Kim <iamjoonsoo.kim@....com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Vlastimil Babka <vbabka@...e.cz>,
        Hyeonggon Yoo <42.hyeyoo@...il.com>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm/slub: add missing TID updates on slab deactivation

On Wed, 8 Jun 2022, Jann Horn wrote:

> The fastpath in slab_alloc_node() assumes that c->slab is stable as long as
> the TID stays the same. However, two places in __slab_alloc() currently
> don't update the TID when deactivating the CPU slab.

Looks ok.

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