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Mon, 03 Aug 2026 20:19:33 -0700 (PDT) Date: Mon, 3 Aug 2026 23:19:30 -0400 From: "Michael S. Tsirkin" To: Jia Jia Cc: stefanha@redhat.com, kvm@vger.kernel.org, virtualization@lists.linux.dev, linux-kernel@vger.kernel.org Subject: Re: [PATCH v2 0/2] vhost/vsock: fix device IOTLB feature lifecycle Message-ID: <20260803231911-mutt-send-email-mst@kernel.org> References: <20260730104857-mutt-send-email-mst@kernel.org> <20260731103414.1746316-1-physicalmtea@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260731103414.1746316-1-physicalmtea@gmail.com> On Fri, Jul 31, 2026 at 06:34:12PM +0800, Jia Jia wrote: > As suggested, split the changes into two patches. > > Patch 1 detaches and frees the device IOTLB when ACCESS_PLATFORM is > cleared. The device and virtqueue IOTLB pointers, metadata caches, and > acked features are updated while all virtqueue mutexes are held. It also > drops old IOTLB miss messages and wakes readers. > > Patch 2 keeps the current IOTLB when ACCESS_PLATFORM remains enabled, > so a runtime logging update does not discard valid translations. pls do not post v2 as reply to v1. confuses tools. thanks! > Changes since v1: > - discard the existing IOTLB instead of returning -EBUSY > - serialize the switch against all virtqueues > - clear old IOTLB messages and wake readers > - move the existing-IOTLB preservation change to a separate patch > > Jia Jia (2): > vhost/vsock: discard IOTLB when ACCESS_PLATFORM is cleared > vhost/vsock: keep IOTLB across feature updates > > drivers/vhost/vsock.c | 46 +++++++++++++++++++++++++++++++++++++------ > 1 file changed, 40 insertions(+), 6 deletions(-) > > -- > 2.34.1