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 smtp3.osuosl.org (smtp3.osuosl.org [140.211.166.136]) (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 98DB8C433F5 for ; Mon, 14 Feb 2022 10:31:17 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp3.osuosl.org (Postfix) with ESMTP id 4CAE260DE5; Mon, 14 Feb 2022 10:31:17 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp3.osuosl.org ([127.0.0.1]) by localhost (smtp3.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id PD3s2Lz46uZO; Mon, 14 Feb 2022 10:31:16 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [IPv6:2605:bc80:3010:104::8cd3:938]) by smtp3.osuosl.org (Postfix) with ESMTPS id 2052860DB2; Mon, 14 Feb 2022 10:31:16 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 03FB0C0011; Mon, 14 Feb 2022 10:31:16 +0000 (UTC) Received: from smtp3.osuosl.org (smtp3.osuosl.org [IPv6:2605:bc80:3010::136]) by lists.linuxfoundation.org (Postfix) with ESMTP id CAADAC000B for ; Mon, 14 Feb 2022 10:31:14 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp3.osuosl.org (Postfix) with ESMTP id AB7E460EB6 for ; Mon, 14 Feb 2022 10:31:14 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp3.osuosl.org ([127.0.0.1]) by localhost (smtp3.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id WPy3hl2IOCgh for ; Mon, 14 Feb 2022 10:31:14 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.8.0 Received: from theia.8bytes.org (8bytes.org [IPv6:2a01:238:4383:600:38bc:a715:4b6d:a889]) by smtp3.osuosl.org (Postfix) with ESMTPS id 2F05360EC9 for ; Mon, 14 Feb 2022 10:31:11 +0000 (UTC) Received: by theia.8bytes.org (Postfix, from userid 1000) id 358A336D; Mon, 14 Feb 2022 11:31:08 +0100 (CET) Date: Mon, 14 Feb 2022 11:31:03 +0100 From: Joerg Roedel To: Jacob Pan Subject: Re: [PATCH 1/2] iommu/vt-d: Fix PCI bus rescan device hot add Message-ID: References: <20220128031002.2219155-1-baolu.lu@linux.intel.com> <20220128031002.2219155-2-baolu.lu@linux.intel.com> <20220201111918.48aadfdf@jacob-builder> <20220203082150.qjsssis6ygh34yen@8bytes.org> <20220209135249.690b8a08@jacob-builder> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20220209135249.690b8a08@jacob-builder> Cc: iommu@lists.linux-foundation.org, Robin Murphy , Guoqing Jiang , Bernice , "Raj, Ashok" X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" Hi Jacob, On Wed, Feb 09, 2022 at 01:52:49PM -0800, Jacob Pan wrote: > Another option Ashok and I discussed is that we can make DMAR cache persist > (which should be for explicitly listed devices in each DRHD) across PCI > remove-rescan cycle, then we don't need the DMAR PCI bus notifier at all. > > This bug only impacts RCIEP device hotplug, which is not the most reasonable > use case, we have the space to look into a proper fix. Even better if you can make the notifier obsolete. Looking forward to the fix. Regards, Joerg _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu