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

Commit 00821b00 authored by Wu Fengguang's avatar Wu Fengguang
Browse files

writeback: show bdi write bandwidth in debugfs 



Add a "BdiWriteBandwidth" entry and indent others in /debug/bdi/*/stats.

btw, increase digital field width to 10, for keeping the possibly
huge BdiWritten number aligned at least for desktop systems.

Impact: this could break user space tools if they are dumb enough to
depend on the number of white spaces.

CC: Theodore Ts'o <tytso@mit.edu>
CC: Jan Kara <jack@suse.cz>
CC: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: default avatarWu Fengguang <fengguang.wu@intel.com>
parent e98be2d5

mm/backing-dev.c

+13 −11
Original line number Diff line number Diff line
@@ -92,23 +92,25 @@ static int bdi_debug_stats_show(struct seq_file *m, void *v) 


#define K(x) ((x) << (PAGE_SHIFT - 10))

	seq_printf(m,

		   "BdiWriteback:     %8lu kB\n"

		   "BdiReclaimable:   %8lu kB\n"

		   "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"

		   "bdi_list:         %8u\n"

		   "state:            %8lx\n",

		   "BdiWriteback:       %10lu kB\n"

		   "BdiReclaimable:     %10lu kB\n"

		   "BdiDirtyThresh:     %10lu kB\n"

		   "DirtyThresh:        %10lu kB\n"

		   "BackgroundThresh:   %10lu kB\n"

		   "BdiWritten:         %10lu kB\n"

		   "BdiWriteBandwidth:  %10lu kBps\n"

		   "b_dirty:            %10lu\n"

		   "b_io:               %10lu\n"

		   "b_more_io:          %10lu\n"

		   "bdi_list:           %10u\n"

		   "state:              %10lx\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),

		   (unsigned long) K(bdi_stat(bdi, BDI_WRITTEN)),

		   (unsigned long) K(bdi->write_bandwidth),

		   nr_dirty,

		   nr_io,

		   nr_more_io,