svn commit: r362371 - head/sys/vm

[Mark Johnston]

Author: markj
Date: Fri Jun 19 11:04:49 2020
New Revision: 362371
URL: https://svnweb.freebsd.org/changeset/base/362371

Log:
  Revert r362360.
  
  This commit was simply wrong since two different objects are locked.
  
  Reported by:	lwhsu, pho
  Pointy hat:	markj

Modified:
  head/sys/vm/vm_object.c

Modified: head/sys/vm/vm_object.c
==============================================================================
--- head/sys/vm/vm_object.c	Fri Jun 19 10:33:45 2020	(r362370)
+++ head/sys/vm/vm_object.c	Fri Jun 19 11:04:49 2020	(r362371)
@@ -864,6 +864,7 @@ vm_object_backing_collapse_wait(vm_object_t object)
 		VM_OBJECT_WLOCK(backing_object);
 		if ((backing_object->flags & (OBJ_DEAD | OBJ_COLLAPSING)) == 0)
 			break;
+		VM_OBJECT_WUNLOCK(object);
 		vm_object_pip_sleep(backing_object, "vmbckwait");
 		counter_u64_add(object_collapse_waits, 1);
 		VM_OBJECT_WLOCK(object);