From patchwork Mon Apr 6 19:58:26 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tejun Heo X-Patchwork-Id: 6164961 Return-Path: X-Original-To: patchwork-linux-fsdevel@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 3A4FABF4A6 for ; Mon, 6 Apr 2015 20:13:23 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 513D520303 for ; Mon, 6 Apr 2015 20:13:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 715EA202EC for ; Mon, 6 Apr 2015 20:13:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753901AbbDFUND (ORCPT ); Mon, 6 Apr 2015 16:13:03 -0400 Received: from mail-qc0-f176.google.com ([209.85.216.176]:35375 "EHLO mail-qc0-f176.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753102AbbDFT7z (ORCPT ); Mon, 6 Apr 2015 15:59:55 -0400 Received: by qcbii10 with SMTP id ii10so15139034qcb.2; Mon, 06 Apr 2015 12:59:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=sender:from:to:cc:subject:date:message-id:in-reply-to:references; bh=qYhk27OrTp+x1R8R/yT1To/miL+FLFwzwaVOAY01/FA=; b=JngsJBB6TwUnEgIXyI2jUpp42oONuTpW28mC97lfi0RKmN8iwKsCnj8ZvngtNRZliH H4oHvCrhGTwRNugzzysKIuz7CfwKIkhKWUr47OsW2o98XjdoF5pxuOgw06bfma4XFYds 0HMmbJvGfozS276CtImR7+lnkKmTXLc1iekoyLjCrvujgAjkfaUwKSzT1dYYYxBpDKo0 gEa1if3tqEbodsCtnaVnkI9Jp3P9JvAnk2TckU5f+Y2w0yANPF2AulgbAAcZ7dC+UE5G JjcyQisRe97uJ8lRf8BOyFJu/u/T8dN3C/F2mYk9q6i241OzLmUICeRWssbV6ZEkr0m6 idGw== X-Received: by 10.140.144.3 with SMTP id 3mr19848515qhq.34.1428350394365; Mon, 06 Apr 2015 12:59:54 -0700 (PDT) Received: from htj.duckdns.org.lan (207-38-238-8.c3-0.wsd-ubr1.qens-wsd.ny.cable.rcn.com. [207.38.238.8]) by mx.google.com with ESMTPSA id z67sm3914418qgz.10.2015.04.06.12.59.52 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 06 Apr 2015 12:59:53 -0700 (PDT) From: Tejun Heo To: axboe@kernel.dk Cc: linux-kernel@vger.kernel.org, jack@suse.cz, hch@infradead.org, hannes@cmpxchg.org, linux-fsdevel@vger.kernel.org, vgoyal@redhat.com, lizefan@huawei.com, cgroups@vger.kernel.org, linux-mm@kvack.org, mhocko@suse.cz, clm@fb.com, fengguang.wu@intel.com, david@fromorbit.com, gthelen@google.com, Tejun Heo Subject: [PATCH 37/49] writeback: make laptop_mode_timer_fn() handle multiple bdi_writeback's Date: Mon, 6 Apr 2015 15:58:26 -0400 Message-Id: <1428350318-8215-38-git-send-email-tj@kernel.org> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1428350318-8215-1-git-send-email-tj@kernel.org> References: <1428350318-8215-1-git-send-email-tj@kernel.org> Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org X-Spam-Status: No, score=-6.8 required=5.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,T_DKIM_INVALID,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 For cgroup writeback support, all bdi-wide operations should be distributed to all its wb's (bdi_writeback's). This patch updates laptop_mode_timer_fn() so that it invokes wb_start_writeback() on all wb's rather than just the root one. As the intent is writing out all dirty data, there's no reason to split the number of pages to write. Signed-off-by: Tejun Heo Cc: Jens Axboe Cc: Jan Kara --- mm/page-writeback.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) diff --git a/mm/page-writeback.c b/mm/page-writeback.c index 3b6d79a..5458762 100644 --- a/mm/page-writeback.c +++ b/mm/page-writeback.c @@ -1723,14 +1723,20 @@ void laptop_mode_timer_fn(unsigned long data) struct request_queue *q = (struct request_queue *)data; int nr_pages = global_page_state(NR_FILE_DIRTY) + global_page_state(NR_UNSTABLE_NFS); + struct bdi_writeback *wb; + struct wb_iter iter; /* * We want to write everything out, not just down to the dirty * threshold */ - if (bdi_has_dirty_io(&q->backing_dev_info)) - wb_start_writeback(&q->backing_dev_info.wb, nr_pages, true, - WB_REASON_LAPTOP_TIMER); + if (!bdi_has_dirty_io(&q->backing_dev_info)) + return; + + bdi_for_each_wb(wb, &q->backing_dev_info, &iter, 0) + if (wb_has_dirty_io(wb)) + wb_start_writeback(wb, nr_pages, true, + WB_REASON_LAPTOP_TIMER); } /*