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Add support for parallel pool exports

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Changed spa_export_common() such that it no longer holds the
spa_namespace_lock for the entire duration and instead sets
spa_export_thread to indicate an import is in progress on the
spa.  This allows for an export to a diffent pool to proceed
in parallel while an export is still processing potentially
long operations like spa_unload_log_sm_flush_all().

Calls like spa_lookup() and spa_vdev_enter() that rely on
the spa_namespace_lock to serialize them against a concurrent
export, now wait for any in-progress export thread to complete
before proceeding.

The 'zpool import -a' sub-command also provides multi-threaded
support, using a thread pool to submit the exports in parallel.

Sponsored-By: Klara Inc.
Sponsored-by: Wasabi Technology, Inc.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: George Wilson <gwilson@delphix.com>
Signed-off-by: Don Brady <don.brady@klarasystems.com>
Closes #16153
This commit is contained in:
Don Brady
2024-05-02 19:28:10 +00:00
committed by Brian Behlendorf
parent abec7dcd30
commit 975a13259b
12 changed files with 373 additions and 33 deletions
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module/zfs/vdev_trim.c
+6 -3
View File
@@ -1040,7 +1040,8 @@ vdev_trim_stop_wait(spa_t *spa, list_t *vd_list)
(void) spa;
vdev_t *vd;
ASSERT(MUTEX_HELD(&spa_namespace_lock));
ASSERT(MUTEX_HELD(&spa_namespace_lock) ||
spa->spa_export_thread == curthread);
while ((vd = list_remove_head(vd_list)) != NULL) {
mutex_enter(&vd->vdev_trim_lock);
@@ -1079,7 +1080,8 @@ vdev_trim_stop(vdev_t *vd, vdev_trim_state_t tgt_state, list_t *vd_list)
if (vd_list == NULL) {
vdev_trim_stop_wait_impl(vd);
} else {
ASSERT(MUTEX_HELD(&spa_namespace_lock));
ASSERT(MUTEX_HELD(&spa_namespace_lock) ||
vd->vdev_spa->spa_export_thread == curthread);
list_insert_tail(vd_list, vd);
}
}
@@ -1115,7 +1117,8 @@ vdev_trim_stop_all(vdev_t *vd, vdev_trim_state_t tgt_state)
list_t vd_list;
vdev_t *vd_l2cache;
ASSERT(MUTEX_HELD(&spa_namespace_lock));
ASSERT(MUTEX_HELD(&spa_namespace_lock) ||
spa->spa_export_thread == curthread);
list_create(&vd_list, sizeof (vdev_t),
offsetof(vdev_t, vdev_trim_node));