[PATCH 2/9] writeback: account per-bdi accumulated written pages
From: Wu Fengguang <hidden>
Date: 2011-06-29 14:52:47
Also in:
lkml
From: Jan Kara <jack@suse.cz> Introduce the BDI_WRITTEN counter. It will be used for estimating the bdi's write bandwidth. Peter Zijlstra [off-list ref]: Move BDI_WRITTEN accounting into __bdi_writeout_inc(). This will cover and fix fuse, which only calls bdi_writeout_inc(). CC: Michael Rubin <redacted> Reviewed-by: KOSAKI Motohiro <redacted> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Wu Fengguang <redacted> --- 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); }