From patchwork Tue Jan 26 10:38:11 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Fam Zheng X-Patchwork-Id: 8120001 Return-Path: X-Original-To: patchwork-qemu-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 35D049F818 for ; Tue, 26 Jan 2016 10:39:18 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id A77442014A for ; Tue, 26 Jan 2016 10:39:17 +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 0A29420145 for ; Tue, 26 Jan 2016 10:39:17 +0000 (UTC) Received: from localhost ([::1]:42894 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aO11o-0004fA-DH for patchwork-qemu-devel@patchwork.kernel.org; Tue, 26 Jan 2016 05:39:16 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:40457) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aO11b-0004Zn-KM for qemu-devel@nongnu.org; Tue, 26 Jan 2016 05:39:04 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aO11X-0007Hd-1X for qemu-devel@nongnu.org; Tue, 26 Jan 2016 05:39:03 -0500 Received: from mx1.redhat.com ([209.132.183.28]:33074) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aO11S-0007HE-QE; Tue, 26 Jan 2016 05:38:54 -0500 Received: from int-mx09.intmail.prod.int.phx2.redhat.com (int-mx09.intmail.prod.int.phx2.redhat.com [10.5.11.22]) by mx1.redhat.com (Postfix) with ESMTPS id 5E09CC0AC912; Tue, 26 Jan 2016 10:38:54 +0000 (UTC) Received: from fam-t430.redhat.com (vpn1-5-65.pek2.redhat.com [10.72.5.65]) by int-mx09.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u0QAcRTD016464; Tue, 26 Jan 2016 05:38:46 -0500 From: Fam Zheng To: qemu-devel@nongnu.org Date: Tue, 26 Jan 2016 18:38:11 +0800 Message-Id: <1453804705-7205-3-git-send-email-famz@redhat.com> In-Reply-To: <1453804705-7205-1-git-send-email-famz@redhat.com> References: <1453804705-7205-1-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 3.x X-Received-From: 209.132.183.28 Cc: Kevin Wolf , Fam Zheng , qemu-block@nongnu.org, jsnow@redhat.com, Markus Armbruster , mreitz@redhat.com, vsementsov@parallels.com, Stefan Hajnoczi Subject: [Qemu-devel] [RFC PATCH 02/16] block: Set dirty before doing write X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org 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 So that driver can write the dirty bits into persistent dirty bitmaps in the write callback. Signed-off-by: Fam Zheng Reviewed-by: Eric Blake Reviewed-by: John Snow --- block/io.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/block/io.c b/block/io.c index 343ff1f..b964e7e 100644 --- a/block/io.c +++ b/block/io.c @@ -1164,6 +1164,8 @@ static int coroutine_fn bdrv_aligned_pwritev(BlockDriverState *bs, } } + bdrv_set_dirty(bs, sector_num, nb_sectors); + if (ret < 0) { /* Do nothing, write notifier decided to fail this request */ } else if (flags & BDRV_REQ_ZERO_WRITE) { @@ -1179,8 +1181,6 @@ static int coroutine_fn bdrv_aligned_pwritev(BlockDriverState *bs, ret = bdrv_co_flush(bs); } - bdrv_set_dirty(bs, sector_num, nb_sectors); - if (bs->wr_highest_offset < offset + bytes) { bs->wr_highest_offset = offset + bytes; }