From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 91B373074AF; Tue, 14 Oct 2025 20:53:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760475195; cv=none; b=CYo+PYno5QPB+tEBtRPMlA2M984Er5uIlrAjo8ChPrLXsXhTyqqd66hV/lmPXv8L6vcuXZ9qfO3PvLMzru35PYs0ViSSJ1wSJ9ezszTi1GnYwoxSi2Ca2nq7Jqc0R8Qd+grKu5w24F3I2o4ccnjVsq0NXHOCzfwjhcVdqSfIJfw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760475195; c=relaxed/simple; bh=n/LR/VOVuEOFCI8XhFHTE8VhAsveYLysbT1xUiVBRoQ=; h=Date:From:To:Cc:Subject:Message-ID:MIME-Version:Content-Type: Content-Disposition:In-Reply-To; b=mc75yd0ujlKgb/7QKM5kiZW43Gm9/6fNf3dNl8DMsxHxq2bKPlKtgWH8ud6ROrX1i18REc/rnAZFs0jPJcqiiju8EA6IiB0p7YlbZdiHUvYUpUAJWj+dzhrfcu4eFQUAGH+gXfhiLSvN8rt+iqmL7OwHX0SSpp+r14AOlGP0lPE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=swyR28py; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="swyR28py" 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> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20251013203146.10162-2-frederic@kernel.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)