From patchwork Wed Sep 9 13:32:22 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhaolei X-Patchwork-Id: 7146951 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 126C89F326 for ; Wed, 9 Sep 2015 13:36:36 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 45BB420945 for ; Wed, 9 Sep 2015 13:36:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7389320944 for ; Wed, 9 Sep 2015 13:36:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755174AbbIINel (ORCPT ); Wed, 9 Sep 2015 09:34:41 -0400 Received: from cn.fujitsu.com ([59.151.112.132]:32797 "EHLO heian.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1754618AbbIINeG (ORCPT ); Wed, 9 Sep 2015 09:34:06 -0400 X-IronPort-AV: E=Sophos;i="5.15,520,1432569600"; d="scan'208";a="100523135" Received: from bogon (HELO edo.cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 09 Sep 2015 21:36:58 +0800 Received: from G08CNEXCHPEKD01.g08.fujitsu.local (localhost.localdomain [127.0.0.1]) by edo.cn.fujitsu.com (8.14.3/8.13.1) with ESMTP id t89DXmLL017485 for ; Wed, 9 Sep 2015 21:33:48 +0800 Received: from localhost.localdomain (10.167.226.114) by G08CNEXCHPEKD01.g08.fujitsu.local (10.167.33.89) with Microsoft SMTP Server id 14.3.181.6; Wed, 9 Sep 2015 21:34:00 +0800 From: Zhao Lei To: CC: Zhao Lei Subject: [PATCH 2/3] btrfs-progs: don't create no-used threads in btrfs-image Date: Wed, 9 Sep 2015 21:32:22 +0800 Message-ID: <3e745f7d9a9545e81283d28671c8ac23cdf28685.1441805445.git.zhaolei@cn.fujitsu.com> X-Mailer: git-send-email 1.8.5.1 In-Reply-To: <1cb14fe54e546b530d0f3991062ff8bca5cc3394.1441805445.git.zhaolei@cn.fujitsu.com> References: <1cb14fe54e546b530d0f3991062ff8bca5cc3394.1441805445.git.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 In case of creating image without compess, we don't need to create many no-used compress threads. Signed-off-by: Zhao Lei --- btrfs-image.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) diff --git a/btrfs-image.c b/btrfs-image.c index 7f49cce..c7681f4 100644 --- a/btrfs-image.c +++ b/btrfs-image.c @@ -2786,11 +2786,14 @@ int main(int argc, char *argv[]) } } - if ((compress_level > 0 || create == 0) && - num_threads == 0) { - num_threads = sysconf(_SC_NPROCESSORS_ONLN); - if (num_threads <= 0) - num_threads = 1; + if (compress_level > 0 || create == 0) { + if (num_threads == 0) { + num_threads = sysconf(_SC_NPROCESSORS_ONLN); + if (num_threads <= 0) + num_threads = 1; + } + } else { + num_threads = 0; } if (create) {