diff options
Diffstat (limited to 'usr/src/uts/common/fs/zfs/spa_checkpoint.c')
| -rw-r--r-- | usr/src/uts/common/fs/zfs/spa_checkpoint.c | 50 |
1 files changed, 26 insertions, 24 deletions
diff --git a/usr/src/uts/common/fs/zfs/spa_checkpoint.c b/usr/src/uts/common/fs/zfs/spa_checkpoint.c index a4af48d8c5..db0d2caa61 100644 --- a/usr/src/uts/common/fs/zfs/spa_checkpoint.c +++ b/usr/src/uts/common/fs/zfs/spa_checkpoint.c @@ -203,13 +203,12 @@ typedef struct spa_checkpoint_discard_sync_callback_arg { } spa_checkpoint_discard_sync_callback_arg_t; static int -spa_checkpoint_discard_sync_callback(maptype_t type, uint64_t offset, - uint64_t size, void *arg) +spa_checkpoint_discard_sync_callback(space_map_entry_t *sme, void *arg) { spa_checkpoint_discard_sync_callback_arg_t *sdc = arg; vdev_t *vd = sdc->sdc_vd; - metaslab_t *ms = vd->vdev_ms[offset >> vd->vdev_ms_shift]; - uint64_t end = offset + size; + metaslab_t *ms = vd->vdev_ms[sme->sme_offset >> vd->vdev_ms_shift]; + uint64_t end = sme->sme_offset + sme->sme_run; if (sdc->sdc_entry_limit == 0) return (EINTR); @@ -224,8 +223,8 @@ spa_checkpoint_discard_sync_callback(maptype_t type, uint64_t offset, * metaslab boundaries. So if needed we could add code * that handles metaslab-crossing segments in the future. */ - VERIFY3U(type, ==, SM_FREE); - VERIFY3U(offset, >=, ms->ms_start); + VERIFY3U(sme->sme_type, ==, SM_FREE); + VERIFY3U(sme->sme_offset, >=, ms->ms_start); VERIFY3U(end, <=, ms->ms_start + ms->ms_size); /* @@ -237,14 +236,15 @@ spa_checkpoint_discard_sync_callback(maptype_t type, uint64_t offset, mutex_enter(&ms->ms_lock); if (range_tree_is_empty(ms->ms_freeing)) vdev_dirty(vd, VDD_METASLAB, ms, sdc->sdc_txg); - range_tree_add(ms->ms_freeing, offset, size); + range_tree_add(ms->ms_freeing, sme->sme_offset, sme->sme_run); mutex_exit(&ms->ms_lock); - ASSERT3U(vd->vdev_spa->spa_checkpoint_info.sci_dspace, >=, size); - ASSERT3U(vd->vdev_stat.vs_checkpoint_space, >=, size); + ASSERT3U(vd->vdev_spa->spa_checkpoint_info.sci_dspace, >=, + sme->sme_run); + ASSERT3U(vd->vdev_stat.vs_checkpoint_space, >=, sme->sme_run); - vd->vdev_spa->spa_checkpoint_info.sci_dspace -= size; - vd->vdev_stat.vs_checkpoint_space -= size; + vd->vdev_spa->spa_checkpoint_info.sci_dspace -= sme->sme_run; + vd->vdev_stat.vs_checkpoint_space -= sme->sme_run; sdc->sdc_entry_limit--; return (0); @@ -289,12 +289,13 @@ spa_checkpoint_discard_thread_sync(void *arg, dmu_tx_t *tx) * Thus, we set the maximum entries that the space map callback * will be applied to be half the entries that could fit in the * imposed memory limit. + * + * Note that since this is a conservative estimate we also + * assume the worst case scenario in our computation where each + * entry is two-word. */ uint64_t max_entry_limit = - (zfs_spa_discard_memory_limit / sizeof (uint64_t)) >> 1; - - uint64_t entries_in_sm = - space_map_length(vd->vdev_checkpoint_sm) / sizeof (uint64_t); + (zfs_spa_discard_memory_limit / (2 * sizeof (uint64_t))) >> 1; /* * Iterate from the end of the space map towards the beginning, @@ -318,14 +319,15 @@ spa_checkpoint_discard_thread_sync(void *arg, dmu_tx_t *tx) spa_checkpoint_discard_sync_callback_arg_t sdc; sdc.sdc_vd = vd; sdc.sdc_txg = tx->tx_txg; - sdc.sdc_entry_limit = MIN(entries_in_sm, max_entry_limit); + sdc.sdc_entry_limit = max_entry_limit; - uint64_t entries_before = entries_in_sm; + uint64_t words_before = + space_map_length(vd->vdev_checkpoint_sm) / sizeof (uint64_t); error = space_map_incremental_destroy(vd->vdev_checkpoint_sm, spa_checkpoint_discard_sync_callback, &sdc, tx); - uint64_t entries_after = + uint64_t words_after = space_map_length(vd->vdev_checkpoint_sm) / sizeof (uint64_t); #ifdef DEBUG @@ -333,9 +335,9 @@ spa_checkpoint_discard_thread_sync(void *arg, dmu_tx_t *tx) #endif zfs_dbgmsg("discarding checkpoint: txg %llu, vdev id %d, " - "deleted %llu entries - %llu entries are left", - tx->tx_txg, vd->vdev_id, (entries_before - entries_after), - entries_after); + "deleted %llu words - %llu words are left", + tx->tx_txg, vd->vdev_id, (words_before - words_after), + words_after); if (error != EINTR) { if (error != 0) { @@ -344,15 +346,15 @@ spa_checkpoint_discard_thread_sync(void *arg, dmu_tx_t *tx) "space map of vdev %llu\n", error, vd->vdev_id); } - ASSERT0(entries_after); + ASSERT0(words_after); ASSERT0(vd->vdev_checkpoint_sm->sm_alloc); - ASSERT0(vd->vdev_checkpoint_sm->sm_length); + ASSERT0(space_map_length(vd->vdev_checkpoint_sm)); space_map_free(vd->vdev_checkpoint_sm, tx); space_map_close(vd->vdev_checkpoint_sm); vd->vdev_checkpoint_sm = NULL; - VERIFY0(zap_remove(vd->vdev_spa->spa_meta_objset, + VERIFY0(zap_remove(spa_meta_objset(vd->vdev_spa), vd->vdev_top_zap, VDEV_TOP_ZAP_POOL_CHECKPOINT_SM, tx)); } } |