diff options
| author | Tim Chase <[email protected]> | 2017-01-31 16:19:08 -0600 |
|---|---|---|
| committer | Brian Behlendorf <[email protected]> | 2017-01-31 14:19:08 -0800 |
| commit | b81a3ddc3207dd832bd236f2ff20d409a0aee0b4 (patch) | |
| tree | 84df1b8bafdf78031652c959fbf442d4ce9b6861 /module/zfs | |
| parent | e24548975ccda48907bd7661ac0ef96b396c6d73 (diff) | |
Update deadman operation to better align with upstream OpenZFS
The deadman in ZoL didn't behave quite as it did in upstream
OpenZFS. In addition to the 2 purposes for which OpenZFS used the
zfs_deadman_synctime_ms parameter, ZoL also used it to determine how
frequently the deadman would fire once it has been triggered.
This patch adds the zfs_deadman_checktime_ms parameter to control how
frequently the subsequent checks are performed.
The deadman is now disabled for suspended pools.
As had been the case, unlike upstream OpenZFS, ZoL will not panic when
a hung IO is detected.
The module parameter documentation has been upated to include the new
parameter and to better describe the operation of the deadmen.
Reviewed-by: Brian Behlendorf <[email protected]>
Reviewed-by: George Melikov <[email protected]>
Signed-off-by: Tim Chase <[email protected]>
Closes #5695
Diffstat (limited to 'module/zfs')
| -rw-r--r-- | module/zfs/spa_misc.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/module/zfs/spa_misc.c b/module/zfs/spa_misc.c index fa9bdd7b8..c39c137e6 100644 --- a/module/zfs/spa_misc.c +++ b/module/zfs/spa_misc.c @@ -298,6 +298,12 @@ int zfs_free_leak_on_eio = B_FALSE; unsigned long zfs_deadman_synctime_ms = 1000000ULL; /* + * Check time in milliseconds. This defines the frequency at which we check + * for hung I/O. + */ +unsigned long zfs_deadman_checktime_ms = 5000ULL; + +/* * By default the deadman is enabled. */ int zfs_deadman_enabled = 1; @@ -524,6 +530,10 @@ spa_deadman(void *arg) { spa_t *spa = arg; + /* Disable the deadman if the pool is suspended. */ + if (spa_suspended(spa)) + return; + zfs_dbgmsg("slow spa_sync: started %llu seconds ago, calls %llu", (gethrtime() - spa->spa_sync_starttime) / NANOSEC, ++spa->spa_deadman_calls); @@ -532,7 +542,7 @@ spa_deadman(void *arg) spa->spa_deadman_tqid = taskq_dispatch_delay(system_delay_taskq, spa_deadman, spa, TQ_SLEEP, ddi_get_lbolt() + - NSEC_TO_TICK(spa->spa_deadman_synctime)); + MSEC_TO_TICK(zfs_deadman_checktime_ms)); } /* @@ -2114,6 +2124,10 @@ MODULE_PARM_DESC(zfs_free_leak_on_eio, module_param(zfs_deadman_synctime_ms, ulong, 0644); MODULE_PARM_DESC(zfs_deadman_synctime_ms, "Expiration time in milliseconds"); +module_param(zfs_deadman_checktime_ms, ulong, 0644); +MODULE_PARM_DESC(zfs_deadman_checktime_ms, + "Dead I/O check interval in milliseconds"); + module_param(zfs_deadman_enabled, int, 0644); MODULE_PARM_DESC(zfs_deadman_enabled, "Enable deadman timer"); |