From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wu Fengguang Subject: [PATCH 1/3] writeback: account per-bdi accumulated written pages Date: Sun, 12 Jun 2011 23:18:22 +0800 Message-ID: <20110612152910.671563785@intel.com> References: <20110612151821.601514494@intel.com> Cc: Jan Kara , Michael Rubin , Wu Fengguang To: Return-path: Received: from mga02.intel.com ([134.134.136.20]:56607 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751822Ab1FLPem (ORCPT ); Sun, 12 Jun 2011 11:34:42 -0400 cc: Dave Chinner cc: Christoph Hellwig cc: Andrew Morton Cc: LKML Content-Disposition: inline; filename=writeback-bdi-written.patch Sender: linux-fsdevel-owner@vger.kernel.org List-ID: From: Jan Kara Introduce the BDI_WRITTEN counter. It will be used for estimating the bdi's write bandwidth. Peter Zijlstra : Move BDI_WRITTEN accounting into __bdi_writeout_inc(). This will cover and fix fuse, which only calls bdi_writeout_inc(). CC: Michael Rubin Reviewed-by: KOSAKI Motohiro Signed-off-by: Jan Kara Signed-off-by: Wu Fengguang --- include/linux/backing-dev.h | 1 + mm/backing-dev.c | 10 ++++++++-- mm/page-writeback.c | 1 + 3 files changed, 10 insertions(+), 2 deletions(-) --- linux-next.orig/include/linux/backing-dev.h 2011-06-12 13:29:02.000000000 +0800 +++ linux-next/include/linux/backing-dev.h 2011-06-12 20:48:47.000000000 +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 2011-06-12 13:29:02.000000000 +0800 +++ linux-next/mm/backing-dev.c 2011-06-12 20:49:51.000000000 +0800 @@ -97,6 +97,7 @@ 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" @@ -104,8 +105,13 @@ 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 2011-06-12 13:29:06.000000000 +0800 +++ linux-next/mm/page-writeback.c 2011-06-12 20:48:47.000000000 +0800 @@ -219,6 +219,7 @@ int dirty_bytes_handler(struct ctl_table */ static inline void __bdi_writeout_inc(struct backing_dev_info *bdi) { + __inc_bdi_stat(bdi, BDI_WRITTEN); __prop_inc_percpu_max(&vm_completions, &bdi->completions, bdi->max_prop_frac); }