Enhanced partition statistics: procfs

Reports enhanced partition statistics in /proc/diskstats.

Signed-off-by: Jerome Marchand <jmarchan@redhat.com>

1 files changed, 22 insertions, 6 deletions

diff --git a/block/genhd.c b/block/genhd.c
index de2ebb2fab43..53f2238e69c8 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -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;