From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wu Fengguang Subject: [PATCH 07/47] writeback: account per-bdi accumulated written pages Date: Mon, 13 Dec 2010 14:42:56 +0800 Message-ID: <20101213064837.789720656@intel.com> References: <20101213064249.648862451@intel.com> Return-path: Received: from kanga.kvack.org ([205.233.56.17]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1PS2FH-0005nI-Tb for glkm-linux-mm-2@m.gmane.org; Mon, 13 Dec 2010 07:50:52 +0100 Received: from mail190.messagelabs.com (mail190.messagelabs.com [216.82.249.51]) by kanga.kvack.org (Postfix) with SMTP id 40FC56B00AB for ; Mon, 13 Dec 2010 01:49:42 -0500 (EST) Content-Disposition: inline; filename=writeback-bdi-written.patch Sender: owner-linux-mm@kvack.org To: Andrew Morton Cc: Jan Kara , Wu Fengguang , Christoph Hellwig , Trond Myklebust , Dave Chinner , Theodore Ts'o , Chris Mason , Peter Zijlstra , Mel Gorman , Rik van Riel , KOSAKI Motohiro , Greg Thelen , Minchan Kim , linux-mm , linux-fsdevel@vger.kernel.org, LKML List-Id: linux-mm.kvack.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); } } -- 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/ . Fight unfair telecom policy in Canada: sign http://dissolvethecrtc.ca/ Don't email: email@kvack.org