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Tue, 02 Nov 2021 00:40:13 -0700 (PDT) X-Google-Smtp-Source: ABdhPJxDXjZ2/S+Zu4EmMWCEIeewzQXHCc0CYy7LGlLuQHKmQa056kHgEW9fPc0Xyhggtn8VOI4Tew== X-Received: by 2002:a7b:c303:: with SMTP id k3mr5030164wmj.44.1635838812943; Tue, 02 Nov 2021 00:40:12 -0700 (PDT) Received: from localhost ([188.26.219.88]) by smtp.gmail.com with ESMTPSA id u16sm1547759wmc.21.2021.11.02.00.40.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 02 Nov 2021 00:40:12 -0700 (PDT) From: Juan Quintela To: Eugenio =?utf-8?Q?P=C3=A9rez?= Subject: Re: [RFC PATCH v5 02/26] vhost: Fix last queue index of devices with no cvq In-Reply-To: <20211029183525.1776416-3-eperezma@redhat.com> ("Eugenio =?utf-8?Q?P=C3=A9rez=22's?= message of "Fri, 29 Oct 2021 20:35:01 +0200") References: <20211029183525.1776416-1-eperezma@redhat.com> <20211029183525.1776416-3-eperezma@redhat.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux) Date: Tue, 02 Nov 2021 08:40:11 +0100 Message-ID: <87mtmnngys.fsf@secure.mitica> MIME-Version: 1.0 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=quintela@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Received-SPF: pass client-ip=170.10.133.124; envelope-from=quintela@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -34 X-Spam_score: -3.5 X-Spam_bar: --- X-Spam_report: (-3.5 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.734, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: quintela@redhat.com Cc: Laurent Vivier , Eduardo Habkost , "Michael S. Tsirkin" , Jason Wang , Richard Henderson , qemu-devel@nongnu.org, Peter Xu , Markus Armbruster , Stefan Hajnoczi , Xiao W Wang , Harpreet Singh Anand , Eli Cohen , Paolo Bonzini , Stefano Garzarella , Eric Blake , virtualization@lists.linux-foundation.org, Parav Pandit Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Eugenio P=C3=A9rez wrote: > The -1 assumes that all devices with no cvq have an spare vq allocated > for them, but with no offer of VIRTIO_NET_F_CTRL_VQ. This may not be the > case, and the device may have a pair number of queues. > > To fix this, just resort to the lower even number of queues. > > Fixes: 049eb15b5fc9 ("vhost: record the last virtqueue index for the > virtio device") > Signed-off-by: Eugenio P=C3=A9rez Reviewed-by: Juan Quintela