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Ratelimit deadman zevents as with delay zevents

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Just as delay zevents can flood the zevent pipe when a vdev becomes
unresponsive, so do the deadman zevents.

Ratelimit deadman zevents according to the same tunable as for delay
zevents.

Enable deadman tests on FreeBSD and add a test for deadman event
ratelimiting. 

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Don Brady <don.brady@delphix.com>
Signed-off-by: Ryan Moeller <ryan@iXsystems.com>
Closes #11786
This commit is contained in:
Ryan Moeller
2021-04-07 19:23:57 -04:00
committed by GitHub
parent c9c6537731
commit e778b0485b
9 changed files with 102 additions and 12 deletions
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module/zfs/vdev.c
+3
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@@ -625,6 +625,8 @@ vdev_alloc_common(spa_t *spa, uint_t id, uint64_t guid, vdev_ops_t *ops)
*/
zfs_ratelimit_init(&vd->vdev_delay_rl, &zfs_slow_io_events_per_second,
1);
zfs_ratelimit_init(&vd->vdev_deadman_rl, &zfs_slow_io_events_per_second,
1);
zfs_ratelimit_init(&vd->vdev_checksum_rl,
&zfs_checksum_events_per_second, 1);
@@ -1106,6 +1108,7 @@ vdev_free(vdev_t *vd)
cv_destroy(&vd->vdev_rebuild_cv);
zfs_ratelimit_fini(&vd->vdev_delay_rl);
zfs_ratelimit_fini(&vd->vdev_deadman_rl);
zfs_ratelimit_fini(&vd->vdev_checksum_rl);
if (vd == spa->spa_root_vdev)