From patchwork Tue Jan 20 07:11:38 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhaolei X-Patchwork-Id: 5665551 Return-Path: X-Original-To: patchwork-linux-btrfs@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 268329F357 for ; Tue, 20 Jan 2015 07:19:14 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 398E820351 for ; Tue, 20 Jan 2015 07:19:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 72C7D20221 for ; Tue, 20 Jan 2015 07:19:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753397AbbATHRy (ORCPT ); Tue, 20 Jan 2015 02:17:54 -0500 Received: from cn.fujitsu.com ([59.151.112.132]:7142 "EHLO heian.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1753449AbbATHNJ (ORCPT ); Tue, 20 Jan 2015 02:13:09 -0500 X-IronPort-AV: E=Sophos;i="5.04,848,1406563200"; d="scan'208";a="56318144" Received: from unknown (HELO edo.cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 20 Jan 2015 15:09:40 +0800 Received: from G08CNEXCHPEKD03.g08.fujitsu.local (localhost.localdomain [127.0.0.1]) by edo.cn.fujitsu.com (8.14.3/8.13.1) with ESMTP id t0K7CV0I004264; Tue, 20 Jan 2015 15:12:31 +0800 Received: from localhost.localdomain (10.167.226.114) by G08CNEXCHPEKD03.g08.fujitsu.local (10.167.33.89) with Microsoft SMTP Server id 14.3.181.6; Tue, 20 Jan 2015 15:13:10 +0800 From: Zhaolei To: CC: Zhao Lei , Miao Xie Subject: [PATCH 08/15] Btrfs: btrfs_rm_dev_replace_blocked(): Use wait_event() Date: Tue, 20 Jan 2015 15:11:38 +0800 Message-ID: <1421737905-1693-9-git-send-email-zhaolei@cn.fujitsu.com> X-Mailer: git-send-email 1.8.5.1 In-Reply-To: <1421737905-1693-1-git-send-email-zhaolei@cn.fujitsu.com> References: <1421737905-1693-1-git-send-email-zhaolei@cn.fujitsu.com> MIME-Version: 1.0 Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham 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 From: Zhao Lei Signed-off-by: Zhao Lei Signed-off-by: Miao Xie --- fs/btrfs/dev-replace.c | 13 ++----------- 1 file changed, 2 insertions(+), 11 deletions(-) diff --git a/fs/btrfs/dev-replace.c b/fs/btrfs/dev-replace.c index 92109b7..5ec03d9 100644 --- a/fs/btrfs/dev-replace.c +++ b/fs/btrfs/dev-replace.c @@ -440,18 +440,9 @@ leave: */ static void btrfs_rm_dev_replace_blocked(struct btrfs_fs_info *fs_info) { - s64 writers; - DEFINE_WAIT(wait); - set_bit(BTRFS_FS_STATE_DEV_REPLACING, &fs_info->fs_state); - do { - prepare_to_wait(&fs_info->replace_wait, &wait, - TASK_UNINTERRUPTIBLE); - writers = percpu_counter_sum(&fs_info->bio_counter); - if (writers) - schedule(); - finish_wait(&fs_info->replace_wait, &wait); - } while (writers); + wait_event(fs_info->replace_wait, !percpu_counter_sum( + &fs_info->bio_counter)); } /*