linux-kernel - Re: [RFC PATCH] mm/page_alloc: Add PCP list for THP CMA

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] [day] [month] [year] [list]

Message-ID: <aIjDqeQR7t3ZlD_C@casper.infradead.org>
Date: Tue, 29 Jul 2025 13:50:49 +0100
From: Matthew Wilcox <willy@...radead.org>
To: "akash.tyagi" <akash.tyagi@...iatek.com>
Cc: ziy@...dia.com, david@...hat.com, surenb@...gle.com,
	akpm@...ux-foundation.org, vbabka@...e.cz, matthias.bgg@...il.com,
	angelogioacchino.delregno@...labora.com, mhocko@...e.com,
	jackmanb@...gle.com, hannes@...xchg.org, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org, wsd_upstream@...iatek.com,
	chinwen.chang@...iatek.com
Subject: Re: [RFC PATCH] mm/page_alloc: Add PCP list for THP CMA

On Tue, Jul 29, 2025 at 06:00:28PM +0530, akash.tyagi wrote:
> Additionally, android kernels create cma pcp list for pages less than PAGE_ALLOC_COSTLY_ORDER, but not for THP pages.

Why bother?  If it's a CMA allocaation, just free it back to CMA
straight away.