diff options
| author | Peter Osterlund <petero2@telia.com> | 2005-09-13 10:25:28 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-09-13 17:22:30 +0200 |
| commit | 06e7ab53f4a1e8bbf66c3985968468949d74d006 (patch) | |
| tree | bf5851f4751e63dbab225a3079e3ad90f171d717 /drivers/block/pktcdvd.c | |
| parent | [PATCH] pktcdvd: documentation update (diff) | |
| download | linux-06e7ab53f4a1e8bbf66c3985968468949d74d006.tar.xz linux-06e7ab53f4a1e8bbf66c3985968468949d74d006.zip | |
[PATCH] pktcdvd: more accurate I/O accounting
In the /proc statistics, only count writes that upper layers have requested.
Don't count additional writes created inside the packet driver to satisfy the
requirement to only write full packets.
Signed-off-by: Peter Osterlund <petero2@telia.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to '')
| -rw-r--r-- | drivers/block/pktcdvd.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c index aacf5cfccada..109db859112a 100644 --- a/drivers/block/pktcdvd.c +++ b/drivers/block/pktcdvd.c @@ -736,12 +736,6 @@ static void pkt_gather_data(struct pktcdvd_device *pd, struct packet_data *pkt) atomic_set(&pkt->io_wait, 0); atomic_set(&pkt->io_errors, 0); - if (pkt->cache_valid) { - VPRINTK("pkt_gather_data: zone %llx cached\n", - (unsigned long long)pkt->sector); - goto out_account; - } - /* * Figure out which frames we need to read before we can write. */ @@ -750,6 +744,7 @@ static void pkt_gather_data(struct pktcdvd_device *pd, struct packet_data *pkt) for (bio = pkt->orig_bios; bio; bio = bio->bi_next) { int first_frame = (bio->bi_sector - pkt->sector) / (CD_FRAMESIZE >> 9); int num_frames = bio->bi_size / CD_FRAMESIZE; + pd->stats.secs_w += num_frames * (CD_FRAMESIZE >> 9); BUG_ON(first_frame < 0); BUG_ON(first_frame + num_frames > pkt->frames); for (f = first_frame; f < first_frame + num_frames; f++) @@ -757,6 +752,12 @@ static void pkt_gather_data(struct pktcdvd_device *pd, struct packet_data *pkt) } spin_unlock(&pkt->lock); + if (pkt->cache_valid) { + VPRINTK("pkt_gather_data: zone %llx cached\n", + (unsigned long long)pkt->sector); + goto out_account; + } + /* * Schedule reads for missing parts of the packet. */ @@ -790,7 +791,6 @@ out_account: frames_read, (unsigned long long)pkt->sector); pd->stats.pkt_started++; pd->stats.secs_rg += frames_read * (CD_FRAMESIZE >> 9); - pd->stats.secs_w += pd->settings.size; } /* |