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 <[email protected]> wrote: > Signed-off-by: Ryo Onodera <[email protected]> > --- > 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 [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
