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 530FEC982D7 for ; Fri, 18 Sep 2026 20:14:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Reply-To:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:Message-Id:Date: Content-Transfer-Encoding:Content-Type:References:In-Reply-To:Cc:To:Subject: From:MIME-Version:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=fUX1CMYSfd1cCzY+rZLKpCj1B/a7Nm8BOcFnIwzacKA=; b=Exx+h+HL6gT1bPNcaOoaonLkbq ubsClLwIlPuh+8Cb6QSWXz09S4AGZyRydY3RAlgPE8HizijWv1sOfFOgHutpsJatef84HMQjsSQMV a49F3TaAJCYcXgdyLuRFennDuUOFVrYwaXvBdk0zlXU41bPDA2/XLXJT/uK5fqpV+zyr0HAHa9nlE FVtRiMT6yMlK59mAXtH/fZvtpYAneaeRD1iIf9CDpT5jHcdaDhXxpgryjoJpIoLwUd7i01RBs8RqF deprwpnYBTTJQDU6Ghpa3r8ltgCFi/VoSpLg0lYYLZc6ErcGuWzSu837NN6PPiskezQkQgU4+Yneb 1RUyuq+g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1x7eya-0000000FUi9-1D58; Fri, 18 Sep 2026 20:14:28 +0000 Received: from tor.source.kernel.org ([2600:3c04:e001:324:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1x7eyY-0000000FUhx-1cI6 for kexec@lists.infradead.org; Fri, 18 Sep 2026 20:14:26 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id CD628602CC; Fri, 18 Sep 2026 20:14:25 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 82EBD1F00898; Fri, 18 Sep 2026 20:14:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789762465; bh=fUX1CMYSfd1cCzY+rZLKpCj1B/a7Nm8BOcFnIwzacKA=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=c1K9JuxoIpd0ybPcfa6kWD3z1AEnt7uah5WM781MT65U7w3mGH1TkBNhFdNZ9WXOh u/uCw2YcDD7rWhPfRaPzF1f+7/RHUmkx8mpTbHwUEjxXqM81pAvR8O2S2gOvqywOQO FWvY2hCiZcx1j0t1FQU4VF9shWKsBGbF/DNyGxLVjy6e9E6Wmo69vBFEijiO1lE8J6 V2oxC45PLi9hOwYS1uVguivaABUjbrNvSZ84D3HlEADtZgW8CA8HbniVzsALfWIYBE wzbiLZAU4WpZa6wwdHt+L3f4lsoucD79w3I5cmeKiF/xx+9pU6VLVlBAPJL/gIn0Zv SLB4jTZYVNvyA== From: sashiko-bot@kernel.org Subject: Re: [PATCH v9 05/13] PCI: liveupdate: Auto-preserve upstream bridges across Live Update To: linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-mm@kvack.org, "David Matlack" Cc: "Adithya Jayachandran" , "Pratyush Yadav" , "Randy Dunlap" , kexec@lists.infradead.org, "Alex Williamson" , "Saeed Mahameed" , "Samiullah Khawaja" , "Shuah Khan" , "Yi Liu" , "Jason Gunthorpe" , "Alexander Graf" , "David Rientjes" , "Chris Li" , "Pranjal Shrivastava" , "William Tu" , "Vipin Sharma" , "Jacob Pan" , "Bjorn Helgaas" , "Jonathan Corbet" , "Josh Hilke" , "Mike Rapoport" , "Parav Pandit" , linux-pci@vger.kernel.org, "Pasha Tatashin" , "Lukas Wunner" , "Leon Romanovsky" In-Reply-To: <20260918200640.887030-6-dmatlack@google.com> References: <20260918200640.887030-1-dmatlack@google.com> <20260918200640.887030-6-dmatlack@google.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Fri, 18 Sep 2026 20:14:24 +0000 Message-Id: <20260918201424.82EBD1F00898@smtp.kernel.org> X-BeenThere: kexec@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: sashiko-reviews@lists.linux.dev Sender: "kexec" Errors-To: kexec-bounces+kexec=archiver.kernel.org@lists.infradead.org > When a PCI device is preserved across a Live Update, all of its upstream > bridges up to the root port must also be preserved. This enables the PCI > core and any drivers bound to the bridges to manage bridges correctly > across a Live Update. >=20 > Notably, this will be used in subsequent commits to ensure that > preserved devices can continue performing memory transactions without a > disruption or change in routing. >=20 > To preserve bridges, the PCI core tracks the number of downstream > devices preserved under each bridge using a reference count in struct > pci_dev_ser. This allows a bridge to remain preserved until all its > downstream preserved devices are unpreserved or finish their > participation in the Live Update. >=20 > Reviewed-by: Pasha Tatashin > Reviewed-by: Pranjal Shrivastava > Signed-off-by: David Matlack Sashiko has reviewed this patch and found no issues. It looks great! --=20 Sashiko AI review =C2=B7 https://sashiko.dev/#/patchset/20260918200640.8870= 30-1-dmatlack@google.com?part=3D5