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Fix asymmetry in devstat(9) calls by GEOM.

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Before this GEOM passed bio pointer to transaction start, but not end.
It was irrelevant until devstat(9) got DTrace hooks, that appeared to
provide bio pointer on I/O completion, but not on submission.

MFC after:	2 weeks
Sponsored by:	iXsystems, Inc.
This commit is contained in:
Alexander Motin 2020-10-24 21:07:10 +00:00
parent 81a6f4c7ae
commit 8b220f8915
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=367022
3 changed files with 14 additions and 2 deletions
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4
sys/geom/geom_io.c
View file

@ -552,9 +552,9 @@ g_io_request(struct bio *bp, struct g_consumer *cp)
else
getbinuptime(&bp->bio_t0);
if (g_collectstats & G_STATS_CONSUMERS)
devstat_start_transaction(cp->stat, &bp->bio_t0);
devstat_start_transaction_bio_t0(cp->stat, bp);
if (g_collectstats & G_STATS_PROVIDERS)
devstat_start_transaction(pp->stat, &bp->bio_t0);
devstat_start_transaction_bio_t0(pp->stat, bp);
#ifdef INVARIANTS
atomic_add_int(&cp->nstart, 1);
#endif

11
sys/kern/subr_devstat.c
View file

@ -256,6 +256,17 @@ devstat_start_transaction_bio(struct devstat *ds, struct bio *bp)
return;
binuptime(&bp->bio_t0);
devstat_start_transaction_bio_t0(ds, bp);
}
void
devstat_start_transaction_bio_t0(struct devstat *ds, struct bio *bp)
{
/* sanity check */
if (ds == NULL)
return;
devstat_start_transaction(ds, &bp->bio_t0);
DTRACE_DEVSTAT_BIO_START();
}

1
sys/sys/devicestat.h
View file

@ -196,6 +196,7 @@ struct devstat *devstat_new_entry(const void *dev_name, int unit_number,
void devstat_remove_entry(struct devstat *ds);
void devstat_start_transaction(struct devstat *ds, const struct bintime *now);
void devstat_start_transaction_bio(struct devstat *ds, struct bio *bp);
void devstat_start_transaction_bio_t0(struct devstat *ds, struct bio *bp);
void devstat_end_transaction(struct devstat *ds, u_int32_t bytes,
devstat_tag_type tag_type,
devstat_trans_flags flags,