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[130.117.225.111]) by mx.google.com with ESMTPS id ffacd0b85a97d-48fef2089a2si7774166f8f.303.2026.11.04.13.35.14 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 04 Nov 2026 13:35:14 -0800 (PST) Received-SPF: pass (google.com: domain of khorenko@virtuozzo.com designates 130.117.225.111 as permitted sender) client-ip=130.117.225.111; Authentication-Results: mx.google.com; dkim=pass header.i=@virtuozzo.com header.s=relay header.b=b8jgYz7p; spf=pass (google.com: domain of khorenko@virtuozzo.com designates 130.117.225.111 as permitted sender) smtp.mailfrom=khorenko@virtuozzo.com; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=virtuozzo.com DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=virtuozzo.com; s=relay; h=Message-Id:Date:From:Subject:Content-Type: MIME-Version; bh=hy3eeFuloX0EL+Mk4wJKAuB2L1FgX6yPmAa4w7fylq4=; b=b8jgYz7pf/Yy qrqOgGdaDyj/uMkDibvxFpcn3KD+hWFvoRHTZST541kmKQssJYZK8xbvQefB3nh6wKn5EqQWCwtdD LbjNblOwGqqG0gpxJL7XKb5xgSrLKnwohop8dWhIvoRYbiryg4whR+84kfRBSiVUQTohTemqIRXnn Br2axO6bhaUnA1wBtFgnqIR/iHZW+rdZh4EB5FigYZkkbM1Kho5g1gOiOIvqpZ/qW14K15WDGtAKC zKY/M7QV4gUw00bvhCCju2akNvyMSrMYmh2pv2NJT8xcEB73eIriavjCAmrhzmEkfR2zWy7hhm8vC +n7eJiThtZ0UHOwW29kmsg==; Received: from ch-demo-asa.virtuozzo.com ([130.117.225.8] helo=f0.sw.ru) by relay.virtuozzo.com with esmtp (Exim 4.96) (envelope-from ) id 1xOiZZ-00248s-12; Wed, 04 Nov 2026 22:35:13 +0100 MIME-Version: 1.0 From: Konstantin Khorenko To: Andrey Zhadchenko In-Reply-To: <20261029140346.465768-6-andrey.zhadchenko@virtuozzo.com> References: <20261029140346.465768-1-andrey.zhadchenko@virtuozzo.com> <20261029140346.465768-6-andrey.zhadchenko@virtuozzo.com> Date: Wed, 04 Nov 2026 22:35:09 +0100 Message-Id: <179382810904.2794215.166433010351657971.b4-review@b4> X-Mailer: b4 0.16.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=822; i=khorenko@virtuozzo.com; h=from:subject:message-id; bh=IGSmBJsfTz39d5bngM4Y241AGhtZ5CdwkzUBo2uTKjg=; b=owEBbQKS/ZANAwAKAVGWCkf5YVwqAcsmYgBq66UQBlgDWMwXDiCLhzwaqm5PqwVgUip3FBC8W xUHLWKkvnKJAjMEAAEKAB0WIQRWD23IPcXT0GO9CCxRlgpH+WFcKgUCauulEAAKCRBRlgpH+WFc KvE9D/9ljV7DgDlTec6kDdOfDL2OIJWNh0bx6yRINjbNRI4OohBsI5eftoHn4LJ5CA+P+fo0BhK TGOHaBkcUIGhwuZshCHKWcH/0B7t/v5vwZt/ti8C/BH4psYZTV4DdW7H0fZ8nEkEpoZjRF5hTcn e1CbRfbyNRjDV6D/w7axDgf2ledN/2mmWiWswFUuWyITvmxLf9m5ZQywOILV5dY7owoSEdmhneu 4IGAmF9iZDCxu+3H9yePQHKc0wCIqrwm/QTstKfJbtR153t7hoFk3IkVIFej2q7Zb3PQMZOvk4l ea52VlGX5lBoZHIzpqKk8LzMFCthrG6ezgRzvogkBhISMxRV6smqAIGYP4iz+H3XrliOHmMCfEa Gr9ZZVYH6eQPdRf4HLHXp2kNN7U01A5FweU7/X5qmnus6o3TXZu76KhPMpktCaRbecxQaRzPM/4 qumzOuOxyjiywgpsFoGn31U+O1rGfqRqnGlM5sszX9LtFMMn1OQqawfG8z81jhjaDHy6pJA9BcR Oxwe1Qy3W5qCpsgWMUX+n5YZ2vyqHb9PiLpDh/lfmL6ZxIqeJCr9is5fgTT+aQP4cPATps9NHrO mGLeJOniuPCX8qqeEX5iEW1e2Mz5fHyt0P24iVm1F4lPC4nGuhx+1VJ3nEA+94Rq8l70o8qiD6X uBVUx/y75V0Tdkg== X-Developer-Key: i=khorenko@virtuozzo.com; a=openpgp; fpr=560F6DC83DC5D3D063BD082C51960A47F9615C2A X-OZ-Fwd: true Cc: devel@openvz.org Subject: Re: [Devel] [PATCH hci-8.1 5/7] drivers/md/dm-qcow2: implement per-qio fast processing X-BeenThere: devel@openvz.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: OpenVZ development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: devel-bounces@openvz.org Errors-To: devel-bounces@openvz.org I won't apply this version, please send v2 with the changes below. On Thu, 29 Oct 2026 17:03:44 +0300, Andrey Zhadchenko wrote: > +static void qio_try_fast(struct qio *qio, struct list_head *deferred_qios) > +{ > + list_del(&qio->link); > + > + if (process_one_qio(qio->qcow2, qio, true)) > + list_add(&qio->link, deferred_qios); > +} Items 1 and 7 of the cover letter reply. This patch is where the race of item 1 becomes live: from here on process_one_qio() runs in parallel with do_qcow2_work(), and a write can reach perform_rw_mapped() after the main kwork switched its L2 page to writeback. The details are in the reply to patch 2. Sashiko's list_add() remark holds, please use list_add_tail() or say why the reversed order is fine. -- Konstantin Khorenko, Virtuozzo Linux Kernel Team _______________________________________________ Devel mailing list Devel@openvz.org https://lists.openvz.org/mailman/listinfo/devel