diff options
| -rw-r--r-- | sys/geom/geom_io.c | 8 | ||||
| -rw-r--r-- | sys/geom/geom_stats.h | 9 |
2 files changed, 9 insertions, 8 deletions
diff --git a/sys/geom/geom_io.c b/sys/geom/geom_io.c index 1912587..f334817 100644 --- a/sys/geom/geom_io.c +++ b/sys/geom/geom_io.c @@ -327,8 +327,8 @@ g_io_deliver(struct bio *bp, int error) } binuptime(&t1); /* Raise the "inconsistent" flag for userland */ - atomic_set_acq_int(&cp->stat->updating, 1); - atomic_set_acq_int(&pp->stat->updating, 1); + atomic_add_acq_int(&cp->stat->seq0, 1); + atomic_add_acq_int(&pp->stat->seq0, 1); if (idx >= 0) { /* Account the service time */ dt = t1; @@ -360,8 +360,8 @@ g_io_deliver(struct bio *bp, int error) bintime_add(&pp->stat->bt, &dt); pp->stat->wentbusy = t1; /* Mark the structures as consistent again */ - atomic_store_rel_int(&cp->stat->updating, 0); - atomic_store_rel_int(&pp->stat->updating, 0); + atomic_add_acq_int(&cp->stat->seq1, 1); + atomic_add_acq_int(&pp->stat->seq1, 1); } cp->stat->nend++; pp->stat->nend++; diff --git a/sys/geom/geom_stats.h b/sys/geom/geom_stats.h index 159cba1..1c13adf 100644 --- a/sys/geom/geom_stats.h +++ b/sys/geom/geom_stats.h @@ -38,11 +38,10 @@ * providers. See libgeom(3) for how to get hold of these. */ struct g_stat { - int updating; + int seq0; /* - * If non-zero, the structure is being - * updated by the kernel and the contents - * should not be used. + * Sequence number, used with seq1 to determine + * if snapshot is consistent. */ void *id; @@ -81,6 +80,8 @@ struct g_stat { #define G_STAT_IDX_WRITE 1 #define G_STAT_IDX_DELETE 2 + int seq1; + /* See seq0 */ }; #endif /* _GEOM_GEOM_STATS_H_ */ |
