diff options
Diffstat (limited to 'module/zfs/dsl_pool.c')
| -rw-r--r-- | module/zfs/dsl_pool.c | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/module/zfs/dsl_pool.c b/module/zfs/dsl_pool.c index 72f4b86d7..1350f1329 100644 --- a/module/zfs/dsl_pool.c +++ b/module/zfs/dsl_pool.c @@ -105,6 +105,14 @@ int zfs_dirty_data_max_percent = 10; int zfs_dirty_data_max_max_percent = 25; /* + * 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. + */ +unsigned long zfs_wrlog_data_max = 0; + +/* * If there's at least this much dirty data (as a percentage of * zfs_dirty_data_max), push out a txg. This should be less than * zfs_vdev_async_write_active_min_dirty_percent. @@ -220,6 +228,11 @@ dsl_pool_open_impl(spa_t *spa, uint64_t txg) mutex_init(&dp->dp_lock, NULL, MUTEX_DEFAULT, NULL); cv_init(&dp->dp_spaceavail_cv, NULL, CV_DEFAULT, NULL); + aggsum_init(&dp->dp_wrlog_total, 0); + for (int i = 0; i < TXG_SIZE; i++) { + aggsum_init(&dp->dp_wrlog_pertxg[i], 0); + } + dp->dp_zrele_taskq = taskq_create("z_zrele", 100, defclsyspri, boot_ncpus * 8, INT_MAX, TASKQ_PREPOPULATE | TASKQ_DYNAMIC | TASKQ_THREADS_CPU_PCT); @@ -416,6 +429,14 @@ dsl_pool_close(dsl_pool_t *dp) rrw_destroy(&dp->dp_config_rwlock); mutex_destroy(&dp->dp_lock); cv_destroy(&dp->dp_spaceavail_cv); + + ASSERT0(aggsum_value(&dp->dp_wrlog_total)); + aggsum_fini(&dp->dp_wrlog_total); + for (int i = 0; i < TXG_SIZE; i++) { + ASSERT0(aggsum_value(&dp->dp_wrlog_pertxg[i])); + aggsum_fini(&dp->dp_wrlog_pertxg[i]); + } + taskq_destroy(dp->dp_unlinked_drain_taskq); taskq_destroy(dp->dp_zrele_taskq); if (dp->dp_blkstats != NULL) { @@ -592,6 +613,36 @@ dsl_pool_dirty_delta(dsl_pool_t *dp, int64_t delta) cv_signal(&dp->dp_spaceavail_cv); } +void +dsl_pool_wrlog_count(dsl_pool_t *dp, int64_t size, uint64_t txg) +{ + ASSERT3S(size, >=, 0); + + aggsum_add(&dp->dp_wrlog_pertxg[txg & TXG_MASK], size); + aggsum_add(&dp->dp_wrlog_total, size); + + /* Choose a value slightly bigger than min dirty sync bytes */ + uint64_t sync_min = + zfs_dirty_data_max * (zfs_dirty_data_sync_percent + 10) / 100; + if (aggsum_compare(&dp->dp_wrlog_pertxg[txg & TXG_MASK], sync_min) > 0) + txg_kick(dp, txg); +} + +boolean_t +dsl_pool_wrlog_over_max(dsl_pool_t *dp) +{ + return (aggsum_compare(&dp->dp_wrlog_total, zfs_wrlog_data_max) > 0); +} + +static void +dsl_pool_wrlog_clear(dsl_pool_t *dp, uint64_t txg) +{ + int64_t delta; + delta = -(int64_t)aggsum_value(&dp->dp_wrlog_pertxg[txg & TXG_MASK]); + aggsum_add(&dp->dp_wrlog_pertxg[txg & TXG_MASK], delta); + aggsum_add(&dp->dp_wrlog_total, delta); +} + #ifdef ZFS_DEBUG static boolean_t dsl_early_sync_task_verify(dsl_pool_t *dp, uint64_t txg) @@ -816,6 +867,9 @@ dsl_pool_sync_done(dsl_pool_t *dp, uint64_t txg) ASSERT(!dmu_objset_is_dirty(zilog->zl_os, txg)); dmu_buf_rele(ds->ds_dbuf, zilog); } + + dsl_pool_wrlog_clear(dp, txg); + ASSERT(!dmu_objset_is_dirty(dp->dp_meta_objset, txg)); } @@ -1405,6 +1459,9 @@ ZFS_MODULE_PARAM(zfs, zfs_, delay_min_dirty_percent, INT, ZMOD_RW, ZFS_MODULE_PARAM(zfs, zfs_, dirty_data_max, ULONG, ZMOD_RW, "Determines the dirty space limit"); +ZFS_MODULE_PARAM(zfs, zfs_, wrlog_data_max, ULONG, ZMOD_RW, + "The size limit of write-transaction zil log data"); + /* zfs_dirty_data_max_max only applied at module load in arc_init(). */ ZFS_MODULE_PARAM(zfs, zfs_, dirty_data_max_max, ULONG, ZMOD_RD, "zfs_dirty_data_max upper bound in bytes"); |