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Add Module Parameter Regarding Log Size Limit

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zfs_wrlog_data_max
The upper limit of TX_WRITE log data. Once it is reached,
write operation is blocked, until log data is cleared out
after txg sync. It only counts TX_WRITE log with WR_COPIED
or WR_NEED_COPY.

Reviewed-by: Prakash Surya <prakash.surya@delphix.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: jxdking <lostking2008@hotmail.com>
Closes #12284
This commit is contained in:
Kevin Jin
2021-07-20 11:40:24 -04:00
committed by Tony Hutter
parent 999830a021
commit d05f3039f7
8 changed files with 106 additions and 2 deletions
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module/zfs/dmu_tx.c
+7
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@@ -53,6 +53,7 @@ dmu_tx_stats_t dmu_tx_stats = {
{ "dmu_tx_dirty_throttle", KSTAT_DATA_UINT64 },
{ "dmu_tx_dirty_delay", KSTAT_DATA_UINT64 },
{ "dmu_tx_dirty_over_max", KSTAT_DATA_UINT64 },
{ "dmu_tx_wrlog_over_max", KSTAT_DATA_UINT64 },
{ "dmu_tx_dirty_frees_delay", KSTAT_DATA_UINT64 },
{ "dmu_tx_quota", KSTAT_DATA_UINT64 },
};
@@ -884,6 +885,12 @@ dmu_tx_try_assign(dmu_tx_t *tx, uint64_t txg_how)
return (SET_ERROR(ERESTART));
}
if (!tx->tx_dirty_delayed &&
dsl_pool_wrlog_over_max(tx->tx_pool)) {
DMU_TX_STAT_BUMP(dmu_tx_wrlog_over_max);
return (SET_ERROR(ERESTART));
}
if (!tx->tx_dirty_delayed &&
dsl_pool_need_dirty_delay(tx->tx_pool)) {
tx->tx_wait_dirty = B_TRUE;