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authorPeter Osterlund <petero2@telia.com>2005-09-13 12:25:28 +0400
committerLinus Torvalds <torvalds@g5.osdl.org>2005-09-13 19:22:30 +0400
commit06e7ab53f4a1e8bbf66c3985968468949d74d006 (patch)
treebf5851f4751e63dbab225a3079e3ad90f171d717 /drivers/block
parenta676f8d092f2a3aff419cacae79c80c3b7f6c0f5 (diff)
downloadlinux-06e7ab53f4a1e8bbf66c3985968468949d74d006.tar.xz
[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 'drivers/block')
-rw-r--r--drivers/block/pktcdvd.c14
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;
}
/*