Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit f7d2b1ec authored by Jan Kara's avatar Jan Kara Committed by Wu Fengguang
Browse files

writeback: account per-bdi accumulated written pages 



Introduce the BDI_WRITTEN counter. It will be used for estimating the
bdi's write bandwidth.

Peter Zijlstra <a.p.zijlstra@chello.nl>:
Move BDI_WRITTEN accounting into __bdi_writeout_inc().
This will cover and fix fuse, which only calls bdi_writeout_inc().

CC: Michael Rubin <mrubin@google.com>
Reviewed-by: default avatarKOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: default avatarJan Kara <jack@suse.cz>
Signed-off-by: default avatarWu Fengguang <fengguang.wu@intel.com>
parent d46db3d5

include/linux/backing-dev.h

+1 −0
Original line number Diff line number Diff line
@@ -40,6 +40,7 @@ typedef int (congested_fn)(void *, int); 
enum bdi_stat_item {

	BDI_RECLAIMABLE,

	BDI_WRITEBACK,

	BDI_WRITTEN,

	NR_BDI_STAT_ITEMS

};

mm/backing-dev.c

+8 −2
Original line number Diff line number Diff line
@@ -97,6 +97,7 @@ static int bdi_debug_stats_show(struct seq_file *m, void *v) 
		   "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 seq_file *m, void *v) 
		   "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

mm/page-writeback.c

+1 −0
Original line number Diff line number Diff line
@@ -219,6 +219,7 @@ int dirty_bytes_handler(struct ctl_table *table, int write, 
 */

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);

}