Commit 06e7ab53 authored by Peter Osterlund's avatar Peter Osterlund Committed by Linus Torvalds
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[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: default avatarPeter Osterlund <petero2@telia.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent a676f8d0
......@@ -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;
}
/*
......
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