writeback: show bdi write bandwidth in debugfs (00821b00) · Commits · 戴 / test

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:

Wu Fengguang <fengguang.wu@intel.com>

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,

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