From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-20.1 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 985F1C4338F for ; Fri, 6 Aug 2021 20:37:34 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id F2A2761181 for ; Fri, 6 Aug 2021 20:37:33 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org F2A2761181 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=nongnu.org Received: from localhost ([::1]:49492 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mC6az-0008JZ-1I for qemu-devel@archiver.kernel.org; Fri, 06 Aug 2021 16:37:33 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:34362) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mC6aP-0007Vm-85 for qemu-devel@nongnu.org; Fri, 06 Aug 2021 16:36:57 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:55061) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mC6aN-0004x6-P9 for qemu-devel@nongnu.org; Fri, 06 Aug 2021 16:36:57 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1628282215; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=jlvCeVgJiXqQvYNqLKa27veWPrJmBk0maDpTfVzzPj0=; b=b2IqrtGGHeg9Gldv/ftHyQFsIp3qQukD4/sSidtBDlgu2GSK5PcdHcS+iTOsmhXHizGxis G5uFFFu4AW6brhZSZLwmt20FPwk9G3gBzhmT+XO+yfZqxnZZOJiZkvsyYQEdRAgSSqEdds grOExtoHDKLu+njFJEBJKAxtIBfpafg= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-37-kkj88SlRMjORzDksAr81-w-1; Fri, 06 Aug 2021 16:36:52 -0400 X-MC-Unique: kkj88SlRMjORzDksAr81-w-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 241F4CC624; Fri, 6 Aug 2021 20:36:51 +0000 (UTC) Received: from redhat.com (ovpn-112-138.phx2.redhat.com [10.3.112.138]) by smtp.corp.redhat.com (Postfix) with ESMTPS id AC07F60C04; Fri, 6 Aug 2021 20:36:50 +0000 (UTC) Date: Fri, 6 Aug 2021 15:36:49 -0500 From: Eric Blake To: Max Reitz Subject: Re: [PATCH for-6.2 v3 09/12] mirror: Check job_is_cancelled() earlier Message-ID: <20210806203649.ahrrwvsjcit5wrnx@redhat.com> References: <20210806093859.706464-1-mreitz@redhat.com> <20210806093859.706464-10-mreitz@redhat.com> MIME-Version: 1.0 In-Reply-To: <20210806093859.706464-10-mreitz@redhat.com> User-Agent: NeoMutt/20210205-687-0ed190 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=eblake@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Received-SPF: pass client-ip=216.205.24.124; envelope-from=eblake@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -34 X-Spam_score: -3.5 X-Spam_bar: --- X-Spam_report: (-3.5 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.7, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , Vladimir Sementsov-Ogievskiy , qemu-devel@nongnu.org, qemu-block@nongnu.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Fri, Aug 06, 2021 at 11:38:56AM +0200, Max Reitz wrote: > We must check whether the job is force-cancelled early in our main loop, > most importantly before any `continue` statement. For example, we used > to have `continue`s before our current checking location that are > triggered by `mirror_flush()` failing. So, if `mirror_flush()` kept > failing, force-cancelling the job would not terminate it. > > Jobs can be cancelled while they yield, and once they are > (force-cancelled), they should not generate new I/O requests. > Therefore, we should put the check after the last yield before > mirror_iteration() is invoked. > > Buglink: https://gitlab.com/qemu-project/qemu/-/issues/462 > Signed-off-by: Max Reitz > --- > block/mirror.c | 10 +++++----- > 1 file changed, 5 insertions(+), 5 deletions(-) Reviewed-by: Eric Blake -- Eric Blake, Principal Software Engineer Red Hat, Inc. +1-919-301-3266 Virtualization: qemu.org | libvirt.org