linux-kernel - Re: [PATCH v3] page_alloc: allow migration of smaller hugepages during contig

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <aP9BqHy3ksstIxfU@localhost.localdomain>
Date: Mon, 27 Oct 2025 10:55:52 +0100
From: Oscar Salvador <osalvador@...e.de>
To: Gregory Price <gourry@...rry.net>
Cc: linux-mm@...ck.org, linux-kernel@...r.kernel.org, kernel-team@...a.com,
	akpm@...ux-foundation.org, vbabka@...e.cz, surenb@...gle.com,
	mhocko@...e.com, jackmanb@...gle.com, hannes@...xchg.org,
	ziy@...dia.com, David Hildenbrand <david@...hat.com>,
	Wei Yang <richard.weiyang@...il.com>
Subject: Re: [PATCH v3] page_alloc: allow migration of smaller hugepages
 during contig_alloc.

On Fri, Oct 24, 2025 at 03:28:49PM -0400, Gregory Price wrote:
> We presently skip regions with hugepages entirely when trying to do
> contiguous page allocation.  Instead, if hugepage migration is enabled,
> consider regions with hugepages smaller than the target contiguous
> allocation request as valid targets for allocation.
> 
> isolate_migrate_pages_block() already expects requests with hugepages
> to originate from alloc_contig, and hugetlb code also does a migratable
> check when isolating in folio_isolate_hugetlb().
> 
> Suggested-by: David Hildenbrand <david@...hat.com>
> Signed-off-by: Gregory Price <gourry@...rry.net>
> Reviewed-by: Zi Yan <ziy@...dia.com>
> Reviewed-by: Wei Yang <richard.weiyang@...il.com>

Reviewed-by: Oscar Salvador <osalvador@...e.de>

 

-- 
Oscar Salvador
SUSE Labs