From patchwork Fri Apr 22 13:53:55 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Fam Zheng X-Patchwork-Id: 8912191 Return-Path: X-Original-To: patchwork-qemu-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 0683EBF29F for ; Fri, 22 Apr 2016 13:56:45 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 6FE8F201F5 for ; Fri, 22 Apr 2016 13:56:44 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 694E620254 for ; Fri, 22 Apr 2016 13:56:43 +0000 (UTC) Received: from localhost ([::1]:33571 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1atbZa-0004aJ-QA for patchwork-qemu-devel@patchwork.kernel.org; Fri, 22 Apr 2016 09:56:42 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:40078) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1atbXL-0008BP-Ai for qemu-devel@nongnu.org; Fri, 22 Apr 2016 09:54:24 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1atbXH-0004dA-B6 for qemu-devel@nongnu.org; Fri, 22 Apr 2016 09:54:23 -0400 Received: from mx1.redhat.com ([209.132.183.28]:53032) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1atbX7-0004cC-Gb; Fri, 22 Apr 2016 09:54:09 -0400 Received: from int-mx09.intmail.prod.int.phx2.redhat.com (int-mx09.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 19283800AF; Fri, 22 Apr 2016 13:54:09 +0000 (UTC) Received: from ad.usersys.redhat.com (dhcp-15-133.nay.redhat.com [10.66.15.133]) by int-mx09.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u3MDrrJF015068; Fri, 22 Apr 2016 09:54:06 -0400 From: Fam Zheng To: qemu-devel@nongnu.org Date: Fri, 22 Apr 2016 21:53:55 +0800 Message-Id: <1461333236-5942-5-git-send-email-famz@redhat.com> In-Reply-To: <1461333236-5942-1-git-send-email-famz@redhat.com> References: <1461333236-5942-1-git-send-email-famz@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.22 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v3 for-2.6 4/5] aio-posix: Skip external nodes in aio_dispatch 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: Kevin Wolf , qemu-block@nongnu.org, "Michael S. Tsirkin" , Jeff Cody , Max Reitz , Stefan Hajnoczi , Paolo Bonzini Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP aio_poll doesn't poll the external nodes so this should never be true, but aio_ctx_dispatch may get notified by the events from GSource. To make bdrv_drained_begin effective in main loop, we should check the is_external flag here too. Also do the check in aio_pending so aio_dispatch is not called superfluously, when there is no events other than external ones. Signed-off-by: Fam Zheng --- aio-posix.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/aio-posix.c b/aio-posix.c index 7fd565f..6006122 100644 --- a/aio-posix.c +++ b/aio-posix.c @@ -282,10 +282,12 @@ bool aio_pending(AioContext *ctx) int revents; revents = node->pfd.revents & node->pfd.events; - if (revents & (G_IO_IN | G_IO_HUP | G_IO_ERR) && node->io_read) { + if (revents & (G_IO_IN | G_IO_HUP | G_IO_ERR) && node->io_read && + aio_node_check(ctx, node->is_external)) { return true; } - if (revents & (G_IO_OUT | G_IO_ERR) && node->io_write) { + if (revents & (G_IO_OUT | G_IO_ERR) && node->io_write && + aio_node_check(ctx, node->is_external)) { return true; } } @@ -323,6 +325,7 @@ bool aio_dispatch(AioContext *ctx) if (!node->deleted && (revents & (G_IO_IN | G_IO_HUP | G_IO_ERR)) && + aio_node_check(ctx, node->is_external) && node->io_read) { node->io_read(node->opaque); @@ -333,6 +336,7 @@ bool aio_dispatch(AioContext *ctx) } if (!node->deleted && (revents & (G_IO_OUT | G_IO_ERR)) && + aio_node_check(ctx, node->is_external) && node->io_write) { node->io_write(node->opaque); progress = true;