Enhanced partition statistics: procfs
Jerome Marchand [Fri, 8 Feb 2008 10:04:56 +0000 (11:04 +0100)]
Reports enhanced partition statistics in /proc/diskstats.

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

block/genhd.c

index de2ebb2..53f2238 100644 (file)
@@ -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;