linux-kernel - Re: [PATCH 1/2] mm: slab: fix comment for ARCH_KMALLOC

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Message-ID: <alpine.DEB.2.22.394.2204290930190.317849@gentwo.de>
Date:   Fri, 29 Apr 2022 09:32:21 +0200 (CEST)
From:   Christoph Lameter <cl@...two.de>
To:     andrey.konovalov@...ux.dev
cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Andrey Konovalov <andreyknvl@...il.com>,
        Pekka Enberg <penberg@...nel.org>,
        David Rientjes <rientjes@...gle.com>,
        Joonsoo Kim <iamjoonsoo.kim@....com>,
        Vlastimil Babka <vbabka@...e.cz>,
        Roman Gushchin <roman.gushchin@...ux.dev>,
        Peter Collingbourne <pcc@...gle.com>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org,
        Andrey Konovalov <andreyknvl@...gle.com>
Subject: Re: [PATCH 1/2] mm: slab: fix comment for ARCH_KMALLOC_MINALIGN

On Thu, 28 Apr 2022, andrey.konovalov@...ux.dev wrote:

> From: Andrey Konovalov <andreyknvl@...gle.com>
>
> The comment next to the ARCH_KMALLOC_MINALIGN definition says that
> ARCH_KMALLOC_MINALIGN can be defined in arch headers. This is incorrect:
> it's actually ARCH_DMA_MINALIGN that can be defined there.

The section is talking about kmalloc and not general kmem_cache_alloc()
and there was the intention of separating the alignment requirements
between these two groups of caches in the slab allocators.