From patchwork Mon Apr 1 12:06:02 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrey Shinkevich X-Patchwork-Id: 10879817 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D833B139A for ; Mon, 1 Apr 2019 12:08:59 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C1E9F28770 for ; Mon, 1 Apr 2019 12:08:59 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B5CF828779; Mon, 1 Apr 2019 12:08:59 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 63ED928770 for ; Mon, 1 Apr 2019 12:08:59 +0000 (UTC) Received: from localhost ([127.0.0.1]:55398 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hAvkI-00019A-OK for patchwork-qemu-devel@patchwork.kernel.org; Mon, 01 Apr 2019 08:08:58 -0400 Received: from eggs.gnu.org ([209.51.188.92]:48079) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hAvhd-0007On-1Y for qemu-devel@nongnu.org; Mon, 01 Apr 2019 08:06:14 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hAvhc-0006ip-29 for qemu-devel@nongnu.org; Mon, 01 Apr 2019 08:06:13 -0400 Received: from relay.sw.ru ([185.231.240.75]:42924) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hAvhb-0006eW-Ne; Mon, 01 Apr 2019 08:06:11 -0400 Received: from [172.16.25.136] (helo=localhost.sw.ru) by relay.sw.ru with esmtp (Exim 4.91) (envelope-from ) id 1hAvhW-0002g8-5K; Mon, 01 Apr 2019 15:06:06 +0300 From: Andrey Shinkevich To: qemu-devel@nongnu.org, qemu-block@nongnu.org Date: Mon, 1 Apr 2019 15:06:02 +0300 Message-Id: <1554120365-39119-1-git-send-email-andrey.shinkevich@virtuozzo.com> X-Mailer: git-send-email 1.8.3.1 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 185.231.240.75 Subject: [Qemu-devel] [PATCH v2 0/3] block/stream: get rid of the base X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: fam@euphon.net, kwolf@redhat.com, vsementsov@virtuozzo.com, berto@igalia.com, armbru@redhat.com, mreitz@redhat.com, stefanha@redhat.com, andrey.shinkevich@virtuozzo.com, den@openvz.org, jsnow@redhat.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP This series introduces a bottom intermediate node that eliminates the dependency on the base that may change while stream job is running. It happens when stream/commit parallel jobs are running on the same backing chain. The base node of the stream job may be a top node of the parallel commit job and can change before the stream job is completed. We avoid that dependency by introducing the bottom node. v2: The function bdrv_find_overlay() with the same functionality has been used in the qmp_block_stream() to find a bottom node. The algorithm in the bdrv_do_is_allocated_above() was simplified. The commit messages were modified. Discussed in the e-mail threads with the message IDs <1553866154-257311-1-git-send-email-andrey.shinkevich@virtuozzo.com> <1550762799-830661-1-git-send-email-andrey.shinkevich@virtuozzo.com> Andrey Shinkevich (2): block: include base when checking image chain for block allocation block/stream: introduce a bottom node Vladimir Sementsov-Ogievskiy (1): block/stream: refactor stream_run: drop goto block/io.c | 32 ++++++++++++++++++---- block/stream.c | 67 ++++++++++++++++++++++------------------------- block/trace-events | 2 +- blockdev.c | 7 ++++- include/block/block.h | 5 +++- include/block/block_int.h | 6 ++--- tests/qemu-iotests/245 | 4 +-- 7 files changed, 74 insertions(+), 49 deletions(-)