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Enhanced partition statistics: procfs 

Reports enhanced partition statistics in /proc/diskstats.

Signed-off-by: Jerome Marchand <jmarchan@redhat.com>
This commit is contained in:
Jerome Marchand 2008-02-08 11:04:56 +01:00 committed by Jens Axboe
parent 34e8beac92
commit 28f39d553e
1 changed files with 22 additions and 6 deletions
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28
block/genhd.c
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@ -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",
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]);
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),
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;