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 A1CB36B0092 for ; Sun, 12 Sep 2010 11:55:02 -0400 (EDT) Message-Id: <20100912155204.121142951@intel.com> Date: Sun, 12 Sep 2010 23:49:55 +0800 From: Wu Fengguang 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: owner-linux-mm@kvack.org To: linux-mm Cc: LKML , Theodore Tso , Jan Kara , Peter Zijlstra , Wu Fengguang , Andrew Morton , Dave Chinner , Mel Gorman , Rik van Riel , KOSAKI Motohiro , Chris Mason , Christoph Hellwig , Li Shaohua List-ID: 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 -- 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