From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail191.messagelabs.com (mail191.messagelabs.com [216.82.242.19]) by kanga.kvack.org (Postfix) with SMTP id A0C336B030F for ; Fri, 20 Aug 2010 06:06:40 -0400 (EDT) Received: from m5.gw.fujitsu.co.jp ([10.0.50.75]) by fgwmail7.fujitsu.co.jp (Fujitsu Gateway) with ESMTP id o7KA6bqx019426 for (envelope-from kosaki.motohiro@jp.fujitsu.com); Fri, 20 Aug 2010 19:06:37 +0900 Received: from smail (m5 [127.0.0.1]) by outgoing.m5.gw.fujitsu.co.jp (Postfix) with ESMTP id 2C17545DE57 for ; Fri, 20 Aug 2010 19:06:37 +0900 (JST) Received: from s5.gw.fujitsu.co.jp (s5.gw.fujitsu.co.jp [10.0.50.95]) by m5.gw.fujitsu.co.jp (Postfix) with ESMTP id 0713945DE54 for ; Fri, 20 Aug 2010 19:06:37 +0900 (JST) Received: from s5.gw.fujitsu.co.jp (localhost.localdomain [127.0.0.1]) by s5.gw.fujitsu.co.jp (Postfix) with ESMTP id DE43DE08005 for ; Fri, 20 Aug 2010 19:06:36 +0900 (JST) Received: from m107.s.css.fujitsu.com (m107.s.css.fujitsu.com [10.249.87.107]) by s5.gw.fujitsu.co.jp (Postfix) with ESMTP id 7D9D01DB8040 for ; Fri, 20 Aug 2010 19:06:36 +0900 (JST) From: KOSAKI Motohiro Subject: Re: [PATCH 4/4] writeback: Reporting dirty thresholds in /proc/vmstat In-Reply-To: <1282296689-25618-5-git-send-email-mrubin@google.com> References: <1282296689-25618-1-git-send-email-mrubin@google.com> <1282296689-25618-5-git-send-email-mrubin@google.com> Message-Id: <20100820190603.6003.A69D9226@jp.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Date: Fri, 20 Aug 2010 19:06:35 +0900 (JST) Sender: owner-linux-mm@kvack.org To: Michael Rubin Cc: kosaki.motohiro@jp.fujitsu.com, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, fengguang.wu@intel.com, jack@suse.cz, riel@redhat.com, akpm@linux-foundation.org, david@fromorbit.com, npiggin@kernel.dk, hch@lst.de, axboe@kernel.dk List-ID: > The kernel already exposes the user desired thresholds in /proc/sys/vm > with dirty_background_ratio and background_ratio. But the kernel may > alter the number requested without giving the user any indication that > is the case. > > Knowing the actual ratios the kernel is honoring can help app developers > understand how their buffered IO will be sent to the disk. > > $ grep threshold /proc/vmstat > nr_dirty_threshold 409111 > nr_dirty_background_threshold 818223 > > Signed-off-by: Michael Rubin Looks good to me. Reviewed-by: KOSAKI Motohiro -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org