From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753472Ab0ILPz0 (ORCPT ); Sun, 12 Sep 2010 11:55:26 -0400 Received: from mga11.intel.com ([192.55.52.93]:33603 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753283Ab0ILPzA (ORCPT ); Sun, 12 Sep 2010 11:55:00 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.56,355,1280732400"; d="scan'208";a="606204414" Message-Id: <20100912155204.121142951@intel.com> User-Agent: quilt/0.48-1 Date: Sun, 12 Sep 2010 23:49:55 +0800 From: Wu Fengguang To: linux-mm Cc: LKML , Theodore Tso , Jan Kara , Peter Zijlstra , Wu Fengguang CC: Andrew Morton CC: Dave Chinner CC: Mel Gorman CC: Rik van Riel CC: KOSAKI Motohiro CC: Chris Mason CC: Christoph Hellwig CC: Li Shaohua Subject: [PATCH 10/17] writeback: show bdi write bandwidth in debugfs References: <20100912154945.758129106@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 | 24 +++++++++++++----------- 1 file changed, 13 insertions(+), 11 deletions(-) --- linux-next.orig/mm/backing-dev.c 2010-09-11 08:42:31.000000000 +0800 +++ linux-next/mm/backing-dev.c 2010-09-12 11:13:49.000000000 +0800 @@ -86,21 +86,23 @@ 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" - "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" + "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), (unsigned long) K(bdi_stat(bdi, BDI_WRITTEN)), + (unsigned long) bdi->write_bandwidth >> 10, nr_dirty, nr_io, nr_more_io, !list_empty(&bdi->bdi_list), bdi->state); #undef K