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Simplify log vdev removal code 

Get rid of the majority metaslab metadata when removing log vdevs
in spa_vdev_remove_log() with a call to metaslab_fini() instead
of duplicating a lot of that in vdev_remove_empty_log().

Reviewed-by: Matt Ahrens <mahrens@delphix.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Serapheim Dimitropoulos <serapheim@delphix.com>
Closes #8347
This commit is contained in:
Serapheim Dimitropoulos 2019-01-31 09:17:52 -08:00 committed by Brian Behlendorf
parent 7558997d2f
commit 6c926f426a
2 changed files with 14 additions and 54 deletions
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52
module/zfs/vdev.c
View File

@ -3179,47 +3179,6 @@ vdev_remove_empty_log(vdev_t *vd, uint64_t txg)
ASSERT(vd == vd->vdev_top);
ASSERT3U(txg, ==, spa_syncing_txg(spa));
if (vd->vdev_ms != NULL) {
metaslab_group_t *mg = vd->vdev_mg;
metaslab_group_histogram_verify(mg);
metaslab_class_histogram_verify(mg->mg_class);
for (int m = 0; m < vd->vdev_ms_count; m++) {
metaslab_t *msp = vd->vdev_ms[m];
if (msp == NULL || msp->ms_sm == NULL)
continue;
mutex_enter(&msp->ms_lock);
/*
* If the metaslab was not loaded when the vdev
* was removed then the histogram accounting may
* not be accurate. Update the histogram information
* here so that we ensure that the metaslab group
* and metaslab class are up-to-date.
*/
metaslab_group_histogram_remove(mg, msp);
VERIFY0(space_map_allocated(msp->ms_sm));
space_map_close(msp->ms_sm);
msp->ms_sm = NULL;
mutex_exit(&msp->ms_lock);
}
if (vd->vdev_checkpoint_sm != NULL) {
ASSERT(spa_has_checkpoint(spa));
space_map_close(vd->vdev_checkpoint_sm);
vd->vdev_checkpoint_sm = NULL;
}
metaslab_group_histogram_verify(mg);
metaslab_class_histogram_verify(mg->mg_class);
for (int i = 0; i < RANGE_TREE_HISTOGRAM_SIZE; i++)
ASSERT0(mg->mg_histogram[i]);
}
dmu_tx_t *tx = dmu_tx_create_assigned(spa_get_dsl(spa), txg);
vdev_destroy_spacemaps(vd, tx);
@ -3253,17 +3212,14 @@ vdev_sync(vdev_t *vd, uint64_t txg)
spa_t *spa = vd->vdev_spa;
vdev_t *lvd;
metaslab_t *msp;
dmu_tx_t *tx;
ASSERT3U(txg, ==, spa->spa_syncing_txg);
dmu_tx_t *tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg);
if (range_tree_space(vd->vdev_obsolete_segments) > 0) {
dmu_tx_t *tx;
ASSERT(vd->vdev_removing ||
vd->vdev_ops == &vdev_indirect_ops);
tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg);
vdev_indirect_sync_obsolete(vd, tx);
dmu_tx_commit(tx);
/*
* If the vdev is indirect, it can't have dirty
@ -3272,6 +3228,7 @@ vdev_sync(vdev_t *vd, uint64_t txg)
if (vd->vdev_ops == &vdev_indirect_ops) {
ASSERT(txg_list_empty(&vd->vdev_ms_list, txg));
ASSERT(txg_list_empty(&vd->vdev_dtl_list, txg));
dmu_tx_commit(tx);
return;
}
}
@ -3282,12 +3239,10 @@ vdev_sync(vdev_t *vd, uint64_t txg)
!vd->vdev_removing) {
ASSERT(vd == vd->vdev_top);
ASSERT0(vd->vdev_indirect_config.vic_mapping_object);
tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg);
vd->vdev_ms_array = dmu_object_alloc(spa->spa_meta_objset,
DMU_OT_OBJECT_ARRAY, 0, DMU_OT_NONE, 0, tx);
ASSERT(vd->vdev_ms_array != 0);
vdev_config_dirty(vd);
dmu_tx_commit(tx);
}
while ((msp = txg_list_remove(&vd->vdev_ms_list, txg)) != NULL) {
@ -3306,6 +3261,7 @@ vdev_sync(vdev_t *vd, uint64_t txg)
vdev_remove_empty_log(vd, txg);
(void) txg_list_add(&spa->spa_vdev_txg_list, vd, TXG_CLEAN(txg));
dmu_tx_commit(tx);
}
uint64_t

12
module/zfs/vdev_removal.c
View File

@ -1858,6 +1858,7 @@ spa_vdev_remove_log(vdev_t *vd, uint64_t *txg)
ASSERT(vd->vdev_islog);
ASSERT(vd == vd->vdev_top);
ASSERT(MUTEX_HELD(&spa_namespace_lock));
/*
* Stop allocating from this vdev.
@ -1872,15 +1873,14 @@ spa_vdev_remove_log(vdev_t *vd, uint64_t *txg)
*txg + TXG_CONCURRENT_STATES + TXG_DEFER_SIZE, 0, FTAG);
/*
* Evacuate the device. We don't hold the config lock as writer
* since we need to do I/O but we do keep the
* Evacuate the device. We don't hold the config lock as
* writer since we need to do I/O but we do keep the
* spa_namespace_lock held. Once this completes the device
* should no longer have any blocks allocated on it.
*/
if (vd->vdev_islog) {
ASSERT(MUTEX_HELD(&spa_namespace_lock));
if (vd->vdev_stat.vs_alloc != 0)
error = spa_reset_logs(spa);
}
*txg = spa_vdev_config_enter(spa);
@ -1899,6 +1899,8 @@ spa_vdev_remove_log(vdev_t *vd, uint64_t *txg)
vdev_dirty_leaves(vd, VDD_DTL, *txg);
vdev_config_dirty(vd);
vdev_metaslab_fini(vd);
spa_vdev_config_exit(spa, NULL, *txg, 0, FTAG);
/* Stop initializing */
@ -1923,6 +1925,8 @@ spa_vdev_remove_log(vdev_t *vd, uint64_t *txg)
if (list_link_active(&vd->vdev_config_dirty_node))
vdev_config_clean(vd);
ASSERT0(vd->vdev_stat.vs_alloc);
/*
* Clean up the vdev namespace.
*/