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[PATCH] aoe 11/12: add support for disk statistics

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add support for disk statistics

Signed-off-by: Ed L. Cashin <ecashin@coraid.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
ecashin@coraid.com 2005-04-18 22:00:22 -07:00 committed by Greg KH
parent e3b7df65e0
commit 0c6f0e7920
3 changed files with 16 additions and 0 deletions
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1
drivers/block/aoe/aoe.h
View file

@ -90,6 +90,7 @@ enum {
struct buf {
struct list_head bufs;
ulong start_time; /* for disk stats */
ulong flags;
ulong nframesout;
char *bufaddr;

1
drivers/block/aoe/aoeblk.c
View file

@ -125,6 +125,7 @@ aoeblk_make_request(request_queue_t *q, struct bio *bio)
}
memset(buf, 0, sizeof(*buf));
INIT_LIST_HEAD(&buf->bufs);
buf->start_time = jiffies;
buf->bio = bio;
buf->resid = bio->bi_size;
buf->sector = bio->bi_sector;

14
drivers/block/aoe/aoecmd.c
View file

@ -456,6 +456,20 @@ aoecmd_ata_rsp(struct sk_buff *skb)
if (buf) {
buf->nframesout -= 1;
if (buf->nframesout == 0 && buf->resid == 0) {
unsigned long duration = jiffies - buf->start_time;
unsigned long n_sect = buf->bio->bi_size >> 9;
struct gendisk *disk = d->gd;
if (bio_data_dir(buf->bio) == WRITE) {
disk_stat_inc(disk, writes);
disk_stat_add(disk, write_ticks, duration);
disk_stat_add(disk, write_sectors, n_sect);
} else {
disk_stat_inc(disk, reads);
disk_stat_add(disk, read_ticks, duration);
disk_stat_add(disk, read_sectors, n_sect);
}
disk_stat_add(disk, io_ticks, duration);
n = (buf->flags & BUFFL_FAIL) ? -EIO : 0;
bio_endio(buf->bio, buf->bio->bi_size, n);
mempool_free(buf, d->bufpool);