From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E96B7CCD184 for ; Tue, 14 Oct 2025 20:53:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:Content-Type: MIME-Version:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:References: List-Owner; bh=elgpkSHi7oRAKLl42GPYSQRGs0aJD3woXeve17j9/bk=; b=3ACna08Akr7Wjp EFJCxPKNNK20AMULsFKTFYG7dpMgsl/CzcbncKfQ5Mr6izCB6PVYxqKYv6+K+rF046Btfnt0iM20o mc3tDvPTMl0EakMxhr+RESTOaOrPravUvs8WAsobHZYyGuthGFAfxi0n4J169QfqkYBOiXR4tCpHk LmNopodBr06gy9ErZUzgCBZm5ZFF+E2JB5H174W+kUYVwcUqFPLTnr1Z94Rx0KEA6hK5sEa3CVThs Q3HXCzSlxzMf3Pys1i1umwn6EqlU87HnzvTL92bLFRXmmtGxjFcl8dmURQ/1vjzUgx2a3rHsAw5Yh fK8MbHHPOnzQ0u5MMJ4A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1v8m1G-0000000HOb5-0r4r; Tue, 14 Oct 2025 20:53:18 +0000 Received: from tor.source.kernel.org ([2600:3c04:e001:324:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1v8m1E-0000000HOaX-1Lmu for linux-arm-kernel@lists.infradead.org; Tue, 14 Oct 2025 20:53:16 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by tor.source.kernel.org (Postfix) with ESMTP id 4AA70623FC; Tue, 14 Oct 2025 20:53:15 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D21D6C4CEF9; Tue, 14 Oct 2025 20:53:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1760475195; bh=n/LR/VOVuEOFCI8XhFHTE8VhAsveYLysbT1xUiVBRoQ=; h=Date:From:To:Cc:Subject:In-Reply-To:From; b=swyR28pypyBnRwl4m3DigwMj3bUrxOd00mzjuGD5aTN0FjLn8NZloGgLtoSm4EWF6 U+OQrImhcyFW1VE+1XOf7gsl+Z6u33VL59B3ZFGSMdhSCKfE10SSPf7PmGdnejwJFG 4W7sgMSd47UsSs4bbQQC0m2b54v2j6riWSO3ueU6abtrZ6v3Z1APYa4Dz7eg+oMj1c E6GAg/xVIOaSHdCbI1G5jNYk9cUVlMAQIS1+cIiZKnhohliyM8TIACP4GiEgzG7+ha 7oSYLyFf2hw0TAj9/uWSaVineqdRxAJldC0oB4sXW5a4J7HK8JAuGF/KcmG4Gk36Tb fkRsty8PnFzAw== Date: Tue, 14 Oct 2025 15:53:13 -0500 From: Bjorn Helgaas To: Frederic Weisbecker Cc: LKML , Michal =?utf-8?Q?Koutn=C3=BD?= , Andrew Morton , Bjorn Helgaas , Catalin Marinas , Danilo Krummrich , "David S . 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-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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)