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Tsirkin" Cc: Parav Pandit , Heng Qi , "jasowang@redhat.com" , "xuanzhuo@linux.alibaba.com" , "eperezma@redhat.com" , Feng Liu , "virtualization@lists.linux.dev" Subject: Re: [PATCH virtio 0/8] virtio_pci_modern: allow parallel admin queue commands execution Message-ID: References: <1719222832.5704103-18-hengqi@linux.alibaba.com> <20240624070832-mutt-send-email-mst@kernel.org> <20240624095239-mutt-send-email-mst@kernel.org> <20240624111347-mutt-send-email-mst@kernel.org> <1719281486.8829272-20-hengqi@linux.alibaba.com> <20240625032753-mutt-send-email-mst@kernel.org> Precedence: bulk X-Mailing-List: virtualization@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20240625032753-mutt-send-email-mst@kernel.org> Tue, Jun 25, 2024 at 09:29:25AM CEST, mst@redhat.com wrote: >On Tue, Jun 25, 2024 at 06:41:52AM +0000, Parav Pandit wrote: >> >> > From: Jiri Pirko >> > Sent: Tuesday, June 25, 2024 12:08 PM >> >> > I'm working on a fallback where admin queue and cvq would share config >> > vector. Lets see. >> >> Cvq or avq resulting in performing more MMIO reads of the config space is not good. >> CVQ and AVQ sharing irq is good, but it should not share with config change interrupt. > >Well if a hardware vendor doesn't want that, allocate enough vectors >and all is well. Your requirement is harder to implement because >ATM cvq isn't special from virtio core POV. Yeah, it's just a fallback. > >-- >MST >