linux-kernel - [Patch 4/6] Enhanced partition statistics: sysfs

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Date:	Fri, 01 Feb 2008 19:14:21 +0100
From:	Jerome Marchand <jmarchan@...hat.com>
To:	linux-kernel@...r.kernel.org
CC:	axboe@...nel.dk, "Ed L. Cashin" <ecashin@...aid.com>
Subject: [Patch 4/6] Enhanced partition statistics: sysfs

Reports enhanced partition statistics in sysfs.

Signed-off-by: Jerome Marchand <jmarchan@...hat.com>
---
 fs/partitions/check.c |   22 +++++++++++++++++++---
 1 file changed, 19 insertions(+), 3 deletions(-)
diff -uprN -X linux-2.6/Documentation/dontdiff linux-2.6.orig/fs/partitions/check.c linux-2.6/fs/partitions/check.c
--- linux-2.6.orig/fs/partitions/check.c	2008-01-31 17:38:43.000000000 +0100
+++ linux-2.6/fs/partitions/check.c	2008-01-31 17:55:42.000000000 +0100
@@ -216,9 +216,25 @@ static ssize_t part_stat_show(struct dev
 {
 	struct hd_struct *p = dev_to_part(dev);
 
-	return sprintf(buf, "%8u %8llu %8u %8llu\n",
-		       p->ios[0], (unsigned long long)p->sectors[0],
-		       p->ios[1], (unsigned long long)p->sectors[1]);
+	preempt_disable();
+	part_round_stats(p);
+	preempt_enable();
+	return sprintf(buf,
+		"%8lu %8lu %8llu %8u "
+		"%8lu %8lu %8llu %8u "
+		"%8u %8u %8u"
+		"\n",
+		part_stat_read(p, ios[READ]),
+		part_stat_read(p, merges[READ]),
+		(unsigned long long)part_stat_read(p, sectors[READ]),
+		jiffies_to_msecs(part_stat_read(p, ticks[READ])),
+		part_stat_read(p, ios[WRITE]),
+		part_stat_read(p, merges[WRITE]),
+		(unsigned long long)part_stat_read(p, sectors[WRITE]),
+		jiffies_to_msecs(part_stat_read(p, ticks[WRITE])),
+		p->in_flight,
+		jiffies_to_msecs(part_stat_read(p, io_ticks)),
+		jiffies_to_msecs(part_stat_read(p, time_in_queue)));
 }
 
 #ifdef CONFIG_FAIL_MAKE_REQUEST

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