From: Ryo Onodera <ryoqun@gmail.com>
To: Nick Piggin <npiggin@kernel.dk>
Cc: linux-kernel@vger.kernel.org
Subject: [PATCH] Enable /proc/diskstats for /dev/ramX
Date: Mon, 19 Nov 2012 16:16:27 +0900 [thread overview]
Message-ID: <1353309387.12210.0.camel@erika> (raw)
Signed-off-by: Ryo Onodera <ryoqun@gmail.com>
---
drivers/block/brd.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/block/brd.c b/drivers/block/brd.c
index 531ceb3..181b2d7 100644
--- a/drivers/block/brd.c
+++ b/drivers/block/brd.c
@@ -332,6 +332,7 @@ static void brd_make_request(struct request_queue *q, struct bio *bio)
sector_t sector;
int i;
int err = -EIO;
+ int cpu;
sector = bio->bi_sector;
if (sector + (bio->bi_size >> SECTOR_SHIFT) >
@@ -348,6 +349,12 @@ static void brd_make_request(struct request_queue *q, struct bio *bio)
if (rw == READA)
rw = READ;
+ cpu = part_stat_lock();
+ part_stat_inc(cpu, &brd->brd_disk->part0, ios[rw]);
+ part_stat_add(cpu, &brd->brd_disk->part0, sectors[rw],
+ bio_sectors(bio));
+ part_stat_unlock();
+
bio_for_each_segment(bvec, bio, i) {
unsigned int len = bvec->bv_len;
err = brd_do_bvec(brd, bvec->bv_page, len,
--
1.7.9.5
next reply other threads:[~2012-11-19 7:17 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-19 7:16 Ryo Onodera [this message]
2012-11-19 7:26 ` Ryo Onodera
2012-12-23 21:41 ` [PATCH] brd: enable diskstats Ryo Onodera
2012-12-23 21:47 ` Ryo Onodera
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