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Convert dbuf dirty record record list to a list_t

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Additionally pull in state machine comments about
upcoming async cow work.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Matt Ahrens <matt@delphix.com>
Signed-off-by: Matt Macy <mmacy@FreeBSD.org>
Closes #9902
This commit is contained in:
Matthew Macy
2020-02-05 11:07:19 -08:00
committed by GitHub
parent 741db5a346
commit cccbed9f98
6 changed files with 103 additions and 91 deletions
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module/zfs/dnode_sync.c
+5 -7
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@@ -207,10 +207,7 @@ free_verify(dmu_buf_impl_t *db, uint64_t start, uint64_t end, dmu_tx_t *tx)
continue;
ASSERT(err == 0);
ASSERT(child->db_level == 0);
dr = child->db_last_dirty;
while (dr && dr->dr_txg > txg)
dr = dr->dr_next;
ASSERT(dr == NULL || dr->dr_txg == txg);
dr = dbuf_find_dirty_eq(child, txg);
/* data_old better be zeroed */
if (dr) {
@@ -231,7 +228,7 @@ free_verify(dmu_buf_impl_t *db, uint64_t start, uint64_t end, dmu_tx_t *tx)
mutex_enter(&child->db_mtx);
buf = child->db.db_data;
if (buf != NULL && child->db_state != DB_FILL &&
child->db_last_dirty == NULL) {
list_is_empty(&child->db_dirty_records)) {
for (j = 0; j < child->db.db_size >> 3; j++) {
if (buf[j] != 0) {
panic("freed data not zero: "
@@ -541,8 +538,9 @@ dnode_undirty_dbufs(list_t *list)
mutex_enter(&db->db_mtx);
/* XXX - use dbuf_undirty()? */
list_remove(list, dr);
ASSERT(db->db_last_dirty == dr);
db->db_last_dirty = NULL;
ASSERT(list_head(&db->db_dirty_records) == dr);
list_remove_head(&db->db_dirty_records);
ASSERT(list_is_empty(&db->db_dirty_records));
db->db_dirtycnt -= 1;
if (db->db_level == 0) {
ASSERT(db->db_blkid == DMU_BONUS_BLKID ||