linux-kernel - Re: [PATCH 3/3] cgroup: use nodes

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: <aWfZ2lkPQWF-gihd@gourry-fedora-PF4VCD3F>
Date: Wed, 14 Jan 2026 13:00:58 -0500
From: Gregory Price <gourry@...rry.net>
To: Yury Norov <ynorov@...dia.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
	Alistair Popple <apopple@...dia.com>,
	Byungchul Park <byungchul@...com>,
	David Hildenbrand <david@...nel.org>,
	Johannes Weiner <hannes@...xchg.org>,
	Joshua Hahn <joshua.hahnjy@...il.com>,
	"Liam R. Howlett" <Liam.Howlett@...cle.com>,
	Lorenzo Stoakes <lorenzo.stoakes@...cle.com>,
	Matthew Brost <matthew.brost@...el.com>,
	Michal Hocko <mhocko@...e.com>,
	Michal Koutný <mkoutny@...e.com>,
	Mike Rapoport <rppt@...nel.org>, Rakie Kim <rakie.kim@...com>,
	Suren Baghdasaryan <surenb@...gle.com>, Tejun Heo <tj@...nel.org>,
	Vlastimil Babka <vbabka@...e.cz>, Waiman Long <longman@...hat.com>,
	Ying Huang <ying.huang@...ux.alibaba.com>, Zi Yan <ziy@...dia.com>,
	cgroups@...r.kernel.org, Yury Norov <yury.norov@...il.com>,
	Rasmus Villemoes <linux@...musvillemoes.dk>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] cgroup: use nodes_and() output where appropriate

On Wed, Jan 14, 2026 at 12:22:15PM -0500, Yury Norov wrote:
> Now that nodes_and() returns true if the result nodemask is not empty,
> drop useless nodes_intersects() in guarantee_online_mems() and
> nodes_empty() in update_nodemasks_hier(), which both are O(N).
> 
> Signed-off-by: Yury Norov <ynorov@...dia.com>

This is a nice simplification, thank you!

Reviewed-by: Gregory Price <gourry@...rry.net>