linux-kernel - Re: [RFC PATCH v2] mm/zswap: store <PAGE

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: <jn2fzoodgcxmyld5c7k6jifigkmbhmq2gftvxx7k4ei2kz6r72@vlrndnijfgrf>
Date: Wed, 6 Aug 2025 16:48:00 -0700
From: Shakeel Butt <shakeel.butt@...ux.dev>
To: David Hildenbrand <david@...hat.com>
Cc: Nhat Pham <nphamcs@...il.com>, SeongJae Park <sj@...nel.org>, 
	"Liam R. Howlett" <Liam.Howlett@...cle.com>, Andrew Morton <akpm@...ux-foundation.org>, 
	Chengming Zhou <chengming.zhou@...ux.dev>, Johannes Weiner <hannes@...xchg.org>, 
	Jonathan Corbet <corbet@....net>, Lorenzo Stoakes <lorenzo.stoakes@...cle.com>, 
	Michal Hocko <mhocko@...e.com>, Mike Rapoport <rppt@...nel.org>, 
	Suren Baghdasaryan <surenb@...gle.com>, Vlastimil Babka <vbabka@...e.cz>, 
	Yosry Ahmed <yosry.ahmed@...ux.dev>, kernel-team@...a.com, linux-doc@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linux-mm@...ck.org, Takero Funaki <flintglass@...il.com>
Subject: Re: [RFC PATCH v2] mm/zswap: store <PAGE_SIZE compression failed
 page as-is

On Wed, Aug 06, 2025 at 10:14:39PM +0200, David Hildenbrand wrote:
> 
> But yeah, whether these "as is" pages are movable or not is a good question
> as well -- in particular when zsmalloc supports page migration and the "as
> is" pages would not.

By "as is" page, do you mean the page which the reclaim code is trying
to reclaim or the page within zsmalloc on which the content of original
pages are copied as is? Most probably you meant the page which the reclaim
code is trying to reclaim. This page is on its way to get freed after
[z]swapout is completed and this patch is not changing any behavior for
that path.