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Miller" , Eric Dumazet , Gabriele Monaco , Greg Kroah-Hartman , Ingo Molnar , Jakub Kicinski , Jens Axboe , Johannes Weiner , Lai Jiangshan , Marco Crivellari , Michal Hocko , Muchun Song , Paolo Abeni , Peter Zijlstra , Phil Auld , "Rafael J . Wysocki" , Roman Gushchin , Shakeel Butt , Simon Horman , Tejun Heo , Thomas Gleixner , Vlastimil Babka , Waiman Long , Will Deacon , cgroups@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-block@vger.kernel.org, linux-mm@kvack.org, linux-pci@vger.kernel.org, netdev@vger.kernel.org Subject: Re: [PATCH 01/33] PCI: Prepare to protect against concurrent isolated cpuset change Message-ID: <20251014205313.GA906793@bhelgaas> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20251013203146.10162-2-frederic@kernel.org> X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 6C86EC000C X-Stat-Signature: cqkz6p8a473kmiube6negd1zaqq159j3 X-Rspam-User: X-HE-Tag: 1760475196-182121 X-HE-Meta: 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 Kl2opcpM 2upLotxkWgA46c0cF6dYzGVuqx3a75X9hIpUOIlrlAhdzCjpsu38DZVgR2SM9tQovbSosnTofqzGlEbb0CL/SqiNakUPEPx8ADeQkw42ehEzCY/1CxNtOohclxnVaklxuqFhM9AkqjtMFhLwTMoPZ40f2AklwRy0Uy2Z5ylevK6Xl/WeG+YUxJabQ3jJpkEUMR0TtPd4CaO/287AIHiy8WBsdWsRzPTXt46yrxjEn9xI1uk5LhYsIy7slSZmvuq5YMqFhs5GxcDJTbB7KgvD97sIo8A== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Mon, Oct 13, 2025 at 10:31:14PM +0200, Frederic Weisbecker wrote: > HK_TYPE_DOMAIN will soon integrate cpuset isolated partitions and > therefore be made modifyable at runtime. Synchronize against the cpumask > update using RCU. > > The RCU locked section includes both the housekeeping CPU target > election for the PCI probe work and the work enqueue. > > This way the housekeeping update side will simply need to flush the > pending related works after updating the housekeeping mask in order to > make sure that no PCI work ever executes on an isolated CPU. This part > will be handled in a subsequent patch. s/modifyable/modifiable/ (also in several other commit logs)