From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756569Ab1CCIXI (ORCPT ); Thu, 3 Mar 2011 03:23:08 -0500 Received: from mga02.intel.com ([134.134.136.20]:40252 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750910Ab1CCIR5 (ORCPT ); Thu, 3 Mar 2011 03:17:57 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.62,257,1297065600"; d="scan'208";a="715563061" Message-Id: <20110303074951.442429447@intel.com> User-Agent: quilt/0.48-1 Date: Thu, 03 Mar 2011 14:45:26 +0800 From: Wu Fengguang To: Andrew Morton CC: Jan Kara , Theodore Tso , Peter Zijlstra , Wu Fengguang CC: Christoph Hellwig CC: Trond Myklebust CC: Dave Chinner CC: Chris Mason CC: Mel Gorman CC: Rik van Riel CC: KOSAKI Motohiro CC: Greg Thelen CC: Minchan Kim CC: Vivek Goyal CC: Andrea Righi CC: Balbir Singh Cc: linux-mm Cc: Cc: LKML Subject: [PATCH 21/27] writeback: show bdi write bandwidth in debugfs References: <20110303064505.718671603@intel.com> Content-Disposition: inline; filename=writeback-bandwidth-show.patch Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add a "BdiWriteBandwidth" entry (and indent others) in /debug/bdi/*/stats. btw increase digital field width to 10, for keeping the possibly huge BdiWritten number aligned at least for desktop systems. This will break user space tools if they are dumb enough to depend on the number of white spaces. CC: Theodore Ts'o CC: Jan Kara CC: Peter Zijlstra Signed-off-by: Wu Fengguang --- mm/backing-dev.c | 34 ++++++++++++++++++++-------------- 1 file changed, 20 insertions(+), 14 deletions(-) --- linux-next.orig/mm/backing-dev.c 2011-03-02 17:40:05.000000000 +0800 +++ linux-next/mm/backing-dev.c 2011-03-02 17:40:41.000000000 +0800 @@ -87,24 +87,30 @@ static int bdi_debug_stats_show(struct s #define K(x) ((x) << (PAGE_SHIFT - 10)) seq_printf(m, - "BdiWriteback: %8lu kB\n" - "BdiReclaimable: %8lu kB\n" - "BdiDirtyThresh: %8lu kB\n" - "DirtyThresh: %8lu kB\n" - "BackgroundThresh: %8lu kB\n" - "BdiDirtied: %8lu kB\n" - "BdiWritten: %8lu kB\n" - "b_dirty: %8lu\n" - "b_io: %8lu\n" - "b_more_io: %8lu\n" - "bdi_list: %8u\n" - "state: %8lx\n", + "BdiWriteback: %10lu kB\n" + "BdiReclaimable: %10lu kB\n" + "BdiDirtyThresh: %10lu kB\n" + "DirtyThresh: %10lu kB\n" + "BackgroundThresh: %10lu kB\n" + "BdiDirtied: %10lu kB\n" + "BdiWritten: %10lu kB\n" + "BdiWriteBandwidth: %10lu kBps\n" + "b_dirty: %10lu\n" + "b_io: %10lu\n" + "b_more_io: %10lu\n" + "bdi_list: %10u\n" + "state: %10lx\n", (unsigned long) K(bdi_stat(bdi, BDI_WRITEBACK)), (unsigned long) K(bdi_stat(bdi, BDI_RECLAIMABLE)), - K(bdi_thresh), K(dirty_thresh), K(background_thresh), + K(bdi_thresh), + K(dirty_thresh), + K(background_thresh), (unsigned long) K(bdi_stat(bdi, BDI_DIRTIED)), (unsigned long) K(bdi_stat(bdi, BDI_WRITTEN)), - nr_dirty, nr_io, nr_more_io, + (unsigned long) K(bdi->write_bandwidth), + nr_dirty, + nr_io, + nr_more_io, !list_empty(&bdi->bdi_list), bdi->state); #undef K