Conserve stack in zfs_mkdir()

Move the sa_attrs array from the stack to the heap to minimize stack
space usage.

diff --git a/module/zfs/zfs_znode.c b/module/zfs/zfs_znode.c
index 93f2f02..b7f95f4 100644 (file)
--- a/module/zfs/zfs_znode.c
+++ b/module/zfs/zfs_znode.c
@@ -773,7 +773,7 @@ zfs_mknode(znode_t *dzp, vattr_t *vap, dmu_tx_t *tx, cred_t *cr,
        int             bonuslen;
        sa_handle_t     *sa_hdl;
        dmu_object_type_t obj_type;
-       sa_bulk_attr_t  sa_attrs[ZPL_END];
+       sa_bulk_attr_t  *sa_attrs;
        int             cnt = 0;
        zfs_acl_locator_cb_t locate = { 0 };
 
@@ -899,6 +899,7 @@ zfs_mknode(znode_t *dzp, vattr_t *vap, dmu_tx_t *tx, cred_t *cr,
         * order for  DMU_OT_ZNODE is critical since it needs to be constructed
         * in the old znode_phys_t format.  Don't change this ordering
         */
+       sa_attrs = kmem_alloc(sizeof(sa_bulk_attr_t) * ZPL_END, KM_SLEEP);
 
        if (obj_type == DMU_OT_ZNODE) {
                SA_ADD_BULK_ATTR(sa_attrs, cnt, SA_ZPL_ATIME(zfsvfs),
@@ -1002,6 +1003,7 @@ zfs_mknode(znode_t *dzp, vattr_t *vap, dmu_tx_t *tx, cred_t *cr,
                err = zfs_aclset_common(*zpp, acl_ids->z_aclp, cr, tx);
                ASSERT3S(err, ==, 0);
        }
+       kmem_free(sa_attrs, sizeof(sa_bulk_attr_t) * ZPL_END);
        ZFS_OBJ_HOLD_EXIT(zfsvfs, obj);
 }