[PATCH] Enable /proc/diskstats for /dev/ramX

Discussion:

(too old to reply)

Ryo Onodera

2012-11-19 07:20:02 UTC

Signed-off-by: Ryo Onodera <***@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

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Ryo Onodera

2012-11-19 07:30:02 UTC

Permalink

Hi,

I'm Ryo Onodera. I created this very tiny patch to enable /proc/diskstats for
/dev/ramX.

I'm contacting Nick Piggin as the maintainer of ramdisk ram block.

This is my first patch to the Linux kernel. Sorry if this is not the expected
way of submitting patches.

Regards

Ryo Onodera

Post by Ryo Onodera
---
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

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Ryo Onodera

2012-12-23 21:50:01 UTC

Permalink

Post by Ryo Onodera
Hi,
I'm Ryo Onodera. I created this very tiny patch to enable /proc/diskstats for
/dev/ramX.
I'm contacting Nick Piggin as the maintainer of ramdisk ram block.
This is my first patch to the Linux kernel. Sorry if this is not the expected
way of submitting patches.
Regards
Ryo Onodera

Ryo Onodera

2012-12-23 21:50:01 UTC

Permalink

Hi,

I'm Ryo Onodera.

This is a resend for my earlier patch. Because I got no reply, I've
added other people as CC, picking from the commit history of the
relevant file.

I created this very tiny patch to enable /proc/diskstats for /dev/ramX.

I'm contacting Nick Piggin as the maintainer of ramdisk ram block. As
mentioned above, I'm also contacting some related people to get more
attention.

This is my first patch to the Linux kernel. Sorry if this is not the
expected way of submitting patches.

Regards