[Patch 7/8] Enhanced partition statistics: procfs

Jerome Marchand
2007-12-13T16:20:53Z

Reports enhanced partition statistics in /proc/diskstats.

Signed-off-by: Jerome Marchand <jmarchan@redhat.com>
---
genhd.c | 27 +++++++++++++++++++++------
1 file changed, 21 insertions(+), 6 deletions(-)
diff -urNp -X linux-2.6/Documentation/dontdiff linux-2.6.orig/block/genhd.c linux-2.6/block/genhd.c
--- linux-2.6.orig/block/genhd.c 2007-12-04 17:37:31.000000000 +0100
+++ linux-2.6/block/genhd.c 2007-12-05 13:52:55.000000000 +0100
@@ -655,12 +655,27 @@ static int diskstats_show(struct seq_fil
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;