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Date: Mon, 24 Dec 2012 06:41:08 +0900 From: Ryo Onodera <ryoqun@...il.com> To: Nick Piggin <npiggin@...nel.dk> Cc: linux-kernel@...r.kernel.org, Namhyung Kim <namhyung@...il.com>, Jens Axboe <jaxboe@...ionio.com> Subject: [PATCH] brd: enable diskstats Signed-off-by: Ryo Onodera <ryoqun@...il.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 On Mon, 2012-11-19 at 16:26 +0900, Ryo Onodera wrote: > 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 > > On Mon, Nov 19, 2012 at 4:16 PM, Ryo Onodera <ryoqun@...il.com> wrote: > > Signed-off-by: Ryo Onodera <ryoqun@...il.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 > > > > > > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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