linux-kernel - Re: [PATCH v2 1/2] mm, slab: restore NUMA policy support for large kmalloc

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Message-ID: <7ia4tt4xvmgi.fsf@castle.c.googlers.com>
Date: Mon, 02 Jun 2025 21:54:21 +0000
From: Roman Gushchin <roman.gushchin@...ux.dev>
To: Vlastimil Babka <vbabka@...e.cz>
Cc: Christoph Lameter <cl@...ux.com>,  David Rientjes <rientjes@...gle.com>,
  Andrew Morton <akpm@...ux-foundation.org>,  Harry Yoo
 <harry.yoo@...cle.com>,  Matthew Wilcox <willy@...radead.org>,
  linux-mm@...ck.org,  linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/2] mm, slab: restore NUMA policy support for large
 kmalloc

Vlastimil Babka <vbabka@...e.cz> writes:

> The slab allocator observes the task's NUMA policy in various places
> such as allocating slab pages. Large kmalloc() allocations used to do
> that too, until an unintended change by c4cab557521a ("mm/slab_common:
> cleanup kmalloc_large()") resulted in ignoring mempolicy and just
> preferring the local node. Restore the NUMA policy support.
>
> Fixes: c4cab557521a ("mm/slab_common: cleanup kmalloc_large()")
> Signed-off-by: Vlastimil Babka <vbabka@...e.cz>

Acked-by: Roman Gushchin <roman.gushchin@...ux.dev>

Thanks!