/*
* Delay this thread by 'ticks' if we are still in the open transaction
* group and there is already a waiting txg quiesing or quiesced. Abort
* the delay if this txg stalls or enters the quiesing state.
*/
void
txg_delay(dsl_pool_t *dp, uint64_t txg, int ticks)
{
tx_state_t *tx = &dp->dp_tx;
clock_t timeout = ddi_get_lbolt() + ticks;
/* don't delay if this txg could transition to quiesing immediately */
if (tx->tx_open_txg > txg ||
tx->tx_syncing_txg == txg-1 || tx->tx_synced_txg == txg-1)
return;
mutex_enter(&tx->tx_sync_lock);
if (tx->tx_open_txg > txg || tx->tx_synced_txg == txg-1) {
mutex_exit(&tx->tx_sync_lock);
return;
}
while (ddi_get_lbolt() < timeout &&
tx->tx_syncing_txg < txg-1 && !txg_stalled(dp))
(void) cv_timedwait(&tx->tx_quiesce_more_cv, &tx->tx_sync_lock,
timeout);
DMU_TX_STAT_BUMP(dmu_tx_delay);
mutex_exit(&tx->tx_sync_lock);
}
/*
* Delay this thread by delay nanoseconds if we are still in the open
* transaction group and there is already a waiting txg quiescing or quiesced.
* Abort the delay if this txg stalls or enters the quiescing state.
*/
void
txg_delay(dsl_pool_t *dp, uint64_t txg, hrtime_t delay, hrtime_t resolution)
{
tx_state_t *tx = &dp->dp_tx;
hrtime_t start = gethrtime();
/* don't delay if this txg could transition to quiescing immediately */
if (tx->tx_open_txg > txg ||
tx->tx_syncing_txg == txg-1 || tx->tx_synced_txg == txg-1)
return;
mutex_enter(&tx->tx_sync_lock);
if (tx->tx_open_txg > txg || tx->tx_synced_txg == txg-1) {
mutex_exit(&tx->tx_sync_lock);
return;
}
while (gethrtime() - start < delay &&
tx->tx_syncing_txg < txg-1 && !txg_stalled(dp)) {
(void) cv_timedwait_hires(&tx->tx_quiesce_more_cv,
&tx->tx_sync_lock, delay, resolution, 0);
}
mutex_exit(&tx->tx_sync_lock);
}
