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 X-Spam-Level: X-Spam-Status: No, score=-4.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6318BC43387 for ; Wed, 9 Jan 2019 18:31:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 39D74214C6 for ; Wed, 9 Jan 2019 18:31:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727810AbfAISbd (ORCPT ); Wed, 9 Jan 2019 13:31:33 -0500 Received: from mx1.redhat.com ([209.132.183.28]:43366 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727759AbfAISbb (ORCPT ); Wed, 9 Jan 2019 13:31:31 -0500 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 96E8CC0528B9; Wed, 9 Jan 2019 18:31:30 +0000 (UTC) Received: from redhat.com (ovpn-123-72.rdu2.redhat.com [10.10.123.72]) by smtp.corp.redhat.com (Postfix) with ESMTP id 9E5BC5D739; Wed, 9 Jan 2019 18:31:28 +0000 (UTC) Date: Wed, 9 Jan 2019 13:31:27 -0500 From: "Michael S. Tsirkin" To: Christian Borntraeger Cc: Wei Wang , virtio-dev@lists.oasis-open.org, linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, kvm@vger.kernel.org, cohuck@redhat.com, pbonzini@redhat.com, dgilbert@redhat.com, pasic@linux.ibm.com Subject: Re: [PATCH v3 1/3] virtio-balloon: tweak config_changed implementation Message-ID: <20190109133114-mutt-send-email-mst@kernel.org> References: <1546844466-38079-1-git-send-email-wei.w.wang@intel.com> <1546844466-38079-2-git-send-email-wei.w.wang@intel.com> <4ea022d4-6b89-b481-5747-871e154dd21a@de.ibm.com> <5C343688.2060609@intel.com> <20f5fb20-612a-fe37-c5e1-af5ecb98f5d3@de.ibm.com> <5C35CE55.6030200@intel.com> <8f0977ee-1cc1-56da-f4a6-641b8887648a@de.ibm.com> <20190109095048-mutt-send-email-mst@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.31]); Wed, 09 Jan 2019 18:31:30 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jan 09, 2019 at 07:22:50PM +0100, Christian Borntraeger wrote: > > On 09.01.2019 15:52, Michael S. Tsirkin wrote: > > On Wed, Jan 09, 2019 at 01:07:16PM +0100, Christian Borntraeger wrote: > >> On 09.01.2019 11:35, Wei Wang wrote: > >>> On 01/08/2019 04:46 PM, Christian Borntraeger wrote: > >>>> > >>>> On 08.01.2019 06:35, Wei Wang wrote: > >>>>> On 01/07/2019 09:49 PM, Christian Borntraeger wrote: > >>>>>> On 07.01.2019 08:01, Wei Wang wrote: > >>>>>>> virtio-ccw has deadlock issues with reading the config space inside the > >>>>>>> interrupt context, so we tweak the virtballoon_changed implementation > >>>>>>> by moving the config read operations into the related workqueue contexts. > >>>>>>> The config_read_bitmap is used as a flag to the workqueue callbacks > >>>>>>> about the related config fields that need to be read. > >>>>>>> > >>>>>>> The cmd_id_received is also renamed to cmd_id_received_cache, and > >>>>>>> the value should be obtained via virtio_balloon_cmd_id_received. > >>>>>>> > >>>>>>> Reported-by: Christian Borntraeger > >>>>>>> Signed-off-by: Wei Wang > >>>>>>> Reviewed-by: Cornelia Huck > >>>>>>> Reviewed-by: Halil Pasic > >>>>>> Together with > >>>>>>     virtio_pci: use queue idx instead of array idx to set up the vq > >>>>>>     virtio: don't allocate vqs when names[i] = NULL > >>>>>> > >>>>>> Tested-by: Christian Borntraeger > >>>>> OK. I don't plan to send a new version of the above patches as no changes needed so far. > >>>>> > >>>>> Michael, if the above two patches look good to you, please help add the related tested-by > >>>>> and reviewed-by tags. Thanks. > >>>> Can we also make sure that > >>>> > >>>> virtio_pci: use queue idx instead of array idx to set up the vq > >>>> virtio: don't allocate vqs when names[i] = NULL > >>>> > >>>> also land in stable? > >>>> > >>> > >>> You could also send the request to stable after it gets merged to Linus' tree. > >>> The stable review committee will decide whether to take it. > >>> > >>> Please see Option 2: > >>> > >>> https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html > >>> > >> > >> Those patches are not upstream yet, Correct? > >> > >> Michael, > >> > >> can you add the stable tag before submitting? If not, can you give me a heads up when doing the > >> pull request so that I can ping the stable folks. > > > > Can you reply to patches that you feel are needed on stable with just > > > > Cc: stable@vger.kernel.org > > > > in the message body? > > > > Then it's all automatically handled by ack attaching scripts. > > Done. But this only works if those patches are not already part of a tree. I guess they have to go via > your tree, correct? Yes. It works because I rebase my tree. -- MST