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Commit 28f39d55 authored by Jerome Marchand's avatar Jerome Marchand Committed by Jens Axboe
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Enhanced partition statistics: procfs 



Reports enhanced partition statistics in /proc/diskstats.

Signed-off-by: default avatarJerome Marchand <jmarchan@redhat.com>
parent 34e8beac

block/genhd.c

+22 −6
Original line number Diff line number Diff line
@@ -584,12 +584,28 @@ static int diskstats_show(struct seq_file *s, void *v) 
	for (n = 0; n < gp->minors - 1; n++) {

		struct hd_struct *hd = gp->part[n];



		if (hd && hd->nr_sects)

			seq_printf(s, "%4d %4d %s %u %u %u %u\n",

		if (!hd || !hd->nr_sects)

			continue;



		preempt_disable();

		part_round_stats(hd);

		preempt_enable();

		seq_printf(s, "%4d %4d %s %lu %lu %llu "

			   "%u %lu %lu %llu %u %u %u %u\n",

			   gp->major, n + gp->first_minor + 1,

			   disk_name(gp, n + 1, buf),

				hd->ios[0], hd->sectors[0],

				hd->ios[1], hd->sectors[1]);

			   part_stat_read(hd, ios[0]),

			   part_stat_read(hd, merges[0]),

			   (unsigned long long)part_stat_read(hd, sectors[0]),

			   jiffies_to_msecs(part_stat_read(hd, ticks[0])),

			   part_stat_read(hd, ios[1]),

			   part_stat_read(hd, merges[1]),

			   (unsigned long long)part_stat_read(hd, sectors[1]),

			   jiffies_to_msecs(part_stat_read(hd, ticks[1])),

			   hd->in_flight,

			   jiffies_to_msecs(part_stat_read(hd, io_ticks)),

			   jiffies_to_msecs(part_stat_read(hd, time_in_queue))

			);

	}

 

	return 0;