Fix stack frame size: dnode_dirty_l1range()

Reviewed-by: Ryan Moeller <freqlabs@FreeBSD.org>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Pavel Snajdr <snajpa@snajpa.net>
Closes #10879

diff --git a/module/zfs/dnode.c b/module/zfs/dnode.c
index 43a2fcad6654a2c10c8ad677c9e6eb897dda9a14..30d20bfefa12bfb42c2ac496bbc5f5810195b4cc 100644 (file)
--- a/module/zfs/dnode.c
+++ b/module/zfs/dnode.c
@@ -1949,18 +1949,20 @@ static void
 dnode_dirty_l1range(dnode_t *dn, uint64_t start_blkid, uint64_t end_blkid,
     dmu_tx_t *tx)
 {
-       dmu_buf_impl_t db_search;
+       dmu_buf_impl_t *db_search;
        dmu_buf_impl_t *db;
        avl_index_t where;
 
+       db_search = kmem_zalloc(sizeof (dmu_buf_impl_t), KM_SLEEP);
+
        mutex_enter(&dn->dn_dbufs_mtx);
 
-       db_search.db_level = 1;
-       db_search.db_blkid = start_blkid + 1;
-       db_search.db_state = DB_SEARCH;
+       db_search->db_level = 1;
+       db_search->db_blkid = start_blkid + 1;
+       db_search->db_state = DB_SEARCH;
        for (;;) {
 
-               db = avl_find(&dn->dn_dbufs, &db_search, &where);
+               db = avl_find(&dn->dn_dbufs, db_search, &where);
                if (db == NULL)
                        db = avl_nearest(&dn->dn_dbufs, where, AVL_AFTER);
 
@@ -1972,7 +1974,7 @@ dnode_dirty_l1range(dnode_t *dn, uint64_t start_blkid, uint64_t end_blkid,
                /*
                 * Setup the next blkid we want to search for.
                 */
-               db_search.db_blkid = db->db_blkid + 1;
+               db_search->db_blkid = db->db_blkid + 1;
                ASSERT3U(db->db_blkid, >=, start_blkid);
 
                /*
@@ -1992,10 +1994,10 @@ dnode_dirty_l1range(dnode_t *dn, uint64_t start_blkid, uint64_t end_blkid,
        /*
         * Walk all the in-core level-1 dbufs and verify they have been dirtied.
         */
-       db_search.db_level = 1;
-       db_search.db_blkid = start_blkid + 1;
-       db_search.db_state = DB_SEARCH;
-       db = avl_find(&dn->dn_dbufs, &db_search, &where);
+       db_search->db_level = 1;
+       db_search->db_blkid = start_blkid + 1;
+       db_search->db_state = DB_SEARCH;
+       db = avl_find(&dn->dn_dbufs, db_search, &where);
        if (db == NULL)
                db = avl_nearest(&dn->dn_dbufs, where, AVL_AFTER);
        for (; db != NULL; db = AVL_NEXT(&dn->dn_dbufs, db)) {
@@ -2005,6 +2007,7 @@ dnode_dirty_l1range(dnode_t *dn, uint64_t start_blkid, uint64_t end_blkid,
                        ASSERT(db->db_dirtycnt > 0);
        }
 #endif
+       kmem_free(db_search, sizeof (dmu_buf_impl_t));
        mutex_exit(&dn->dn_dbufs_mtx);
 }