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Change checksum & IO delay ratelimit values

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Change checksum & IO delay ratelimit thresholds from 5/sec to 20/sec.
This allows zed to actually trigger if a bunch of these events arrive in
a short period of time (zed has a threshold of 10 events in 10 sec).
Previously, if you had, say, 100 checksum errors in 1 sec, it would get
ratelimited to 5/sec which wouldn't trigger zed to fault the drive.

Also, convert the checksum and IO delay thresholds to module params for
easy testing.

Reviewed-by: loli10K <ezomori.nozomu@gmail.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Giuseppe Di Natale <dinatale2@llnl.gov>
Signed-off-by: Tony Hutter <hutter2@llnl.gov>
Closes #7252
This commit is contained in:
Tony Hutter
2018-03-04 17:34:51 -08:00
parent 792f88131c
commit 6dc40e2ada
5 changed files with 71 additions and 9 deletions
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module/zcommon/zfs_comutil.c
+2 -2
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@@ -215,7 +215,7 @@ const char *zfs_history_event_names[ZFS_NUM_LEGACY_HISTORY_EVENTS] = {
* interval: Interval time in seconds
*/
void
zfs_ratelimit_init(zfs_ratelimit_t *rl, unsigned int burst,
zfs_ratelimit_init(zfs_ratelimit_t *rl, unsigned int *burst,
unsigned int interval)
{
rl->count = 0;
@@ -270,7 +270,7 @@ zfs_ratelimit(zfs_ratelimit_t *rl)
rl->start = now;
rl->count = 0;
} else {
if (rl->count >= rl->burst) {
if (rl->count >= *rl->burst) {
rc = 0; /* We're ratelimiting */
}
}