From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932322Ab0LMGxd (ORCPT ); Mon, 13 Dec 2010 01:53:33 -0500 Received: from mga09.intel.com ([134.134.136.24]:10971 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755368Ab0LMGto (ORCPT ); Mon, 13 Dec 2010 01:49:44 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.59,335,1288594800"; d="scan'208";a="686523137" Message-Id: <20101213064837.789720656@intel.com> User-Agent: quilt/0.48-1 Date: Mon, 13 Dec 2010 14:42:56 +0800 From: Wu Fengguang To: Andrew Morton CC: Jan Kara , Wu Fengguang CC: Christoph Hellwig CC: Trond Myklebust CC: Dave Chinner CC: "Theodore Ts'o" CC: Chris Mason CC: Peter Zijlstra CC: Mel Gorman CC: Rik van Riel CC: KOSAKI Motohiro CC: Greg Thelen CC: Minchan Kim Cc: linux-mm Cc: Cc: LKML Subject: [PATCH 07/47] writeback: account per-bdi accumulated written pages References: <20101213064249.648862451@intel.com> Content-Disposition: inline; filename=writeback-bdi-written.patch Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jan Kara Introduce the BDI_WRITTEN counter. It will be used for estimating the bdi's write bandwidth. Reviewed-by: KOSAKI Motohiro Signed-off-by: Jan Kara Signed-off-by: Wu Fengguang --- include/linux/backing-dev.h | 1 + mm/backing-dev.c | 6 ++++-- mm/page-writeback.c | 1 + 3 files changed, 6 insertions(+), 2 deletions(-) --- linux-next.orig/include/linux/backing-dev.h 2010-12-08 22:43:58.000000000 +0800 +++ linux-next/include/linux/backing-dev.h 2010-12-08 22:44:24.000000000 +0800 @@ -40,6 +40,7 @@ typedef int (congested_fn)(void *, int); enum bdi_stat_item { BDI_RECLAIMABLE, BDI_WRITEBACK, + BDI_WRITTEN, NR_BDI_STAT_ITEMS }; --- linux-next.orig/mm/backing-dev.c 2010-12-08 22:44:21.000000000 +0800 +++ linux-next/mm/backing-dev.c 2010-12-08 22:44:24.000000000 +0800 @@ -92,6 +92,7 @@ static int bdi_debug_stats_show(struct s "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" @@ -99,8 +100,9 @@ static int bdi_debug_stats_show(struct s "state: %8lx\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), nr_dirty, nr_io, nr_more_io, + K(bdi_thresh), K(dirty_thresh), K(background_thresh), + (unsigned long) K(bdi_stat(bdi, BDI_WRITTEN)), + nr_dirty, nr_io, nr_more_io, !list_empty(&bdi->bdi_list), bdi->state); #undef K --- linux-next.orig/mm/page-writeback.c 2010-12-08 22:44:23.000000000 +0800 +++ linux-next/mm/page-writeback.c 2010-12-08 22:44:24.000000000 +0800 @@ -1329,6 +1329,7 @@ int test_clear_page_writeback(struct pag PAGECACHE_TAG_WRITEBACK); if (bdi_cap_account_writeback(bdi)) { __dec_bdi_stat(bdi, BDI_WRITEBACK); + __inc_bdi_stat(bdi, BDI_WRITTEN); __bdi_writeout_inc(bdi); } }