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MMP should not suspend pool in ztest

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When running ztest, never suspend the pool due to failed or delayed
MMP writes.

There are many sources of long delays within ztest, such as device
opens, closes, etc. which in combination, may delay MMP writes too
long and cause MMP to suspend the pool.

Some of these delays also affect real pools, and should be fixed.
That is being worked separately.

Reviewed-by: Giuseppe Di Natale <dinatale2@llnl.gov>
Reviewed-by: George Melikov <mail@gmelikov.ru>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Olaf Faaland <faaland1@llnl.gov>
Closes #7776
This commit is contained in:
Olaf Faaland 2018-08-13 08:12:25 -07:00 committed by Brian Behlendorf
parent 94b197a0a5
commit 5200237711
1 changed files with 2 additions and 0 deletions
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2
cmd/ztest/ztest.c
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@ -2770,6 +2770,8 @@ ztest_mmp_enable_disable(ztest_ds_t *zd, uint64_t id)
spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
mutex_enter(&spa->spa_props_lock);
zfs_multihost_fail_intervals = 0;
if (!spa_multihost(spa)) {
spa->spa_multihost = B_TRUE;
mmp_thread_start(spa);