From patchwork Fri Mar 29 13:29:11 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrey Shinkevich X-Patchwork-Id: 1069645 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=virtuozzo.com Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 44W2fT5GXZz9sP3 for ; Sat, 30 Mar 2019 00:30:09 +1100 (AEDT) Received: from localhost ([127.0.0.1]:52964 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1h9raB-0001sJ-Ks for incoming@patchwork.ozlabs.org; Fri, 29 Mar 2019 09:30:07 -0400 Received: from eggs.gnu.org ([209.51.188.92]:47513) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1h9rZU-0001qv-PQ for qemu-devel@nongnu.org; Fri, 29 Mar 2019 09:29:25 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1h9rZT-0005zF-U7 for qemu-devel@nongnu.org; Fri, 29 Mar 2019 09:29:24 -0400 Received: from relay.sw.ru ([185.231.240.75]:52216) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1h9rZT-0005wv-6H; Fri, 29 Mar 2019 09:29:23 -0400 Received: from [172.16.25.136] (helo=localhost.sw.ru) by relay.sw.ru with esmtp (Exim 4.91) (envelope-from ) id 1h9rZK-0005gf-Ut; Fri, 29 Mar 2019 16:29:15 +0300 From: Andrey Shinkevich To: qemu-devel@nongnu.org, qemu-block@nongnu.org Date: Fri, 29 Mar 2019 16:29:11 +0300 Message-Id: <1553866154-257311-1-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 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: kwolf@redhat.com, fam@euphon.net, 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+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" 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. Discussed in the e-mail thread with the message ID <1550762799-830661-1-git-send-email-andrey.shinkevich@virtuozzo.com> Andrey Shinkevich (3): block: include base when checking image chain for block allocation block/stream: refactor stream_run: drop goto block/stream: introduce a bottom node block/io.c | 39 +++++++++++++++++++++++---- block/stream.c | 69 +++++++++++++++++++++++------------------------ block/trace-events | 2 +- blockdev.c | 10 ++++++- include/block/block.h | 5 +++- include/block/block_int.h | 6 ++--- tests/qemu-iotests/245 | 4 +-- 7 files changed, 87 insertions(+), 48 deletions(-)