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[80.230.25.21]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-489207ebd3asm105393815e9.6.2026.04.22.09.12.05 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 22 Apr 2026 09:12:05 -0700 (PDT) Date: Wed, 22 Apr 2026 12:12:04 -0400 From: "Michael S. Tsirkin" To: virtio-comment@lists.linux.dev Subject: [PATCH 0/2] support device init for balloon pages Message-ID: Precedence: bulk X-Mailing-List: virtio-comment@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Mailer: git-send-email 2.27.0.106.g8ac3dc51b1 X-Mutt-Fcc: =sent X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: 748fntl7K3zjj6lKrEr5yPqvlNi2kRe3tsaxc1gdbeg_1776874328 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Once a page gets out of balloon (on deflate, or on access for reporting) the Linux guest inits it before giving it to app. It's a waste - the page is already inited by the host. Add balloon support for skipping that, that provides significant performance gains: https://lore.kernel.org/all/cover.1776808209.git.mst@redhat.com/ Michael S. Tsirkin (2): balloon: add VIRTIO_BALLOON_F_DEVICE_INIT_REPORTED balloon: add VIRTIO_BALLOON_F_DEVICE_INIT_DEFLATED device-types/balloon/description.tex | 108 ++++++++++++++++++++ device-types/balloon/device-conformance.tex | 2 + device-types/balloon/driver-conformance.tex | 2 + 3 files changed, 112 insertions(+) -- MST