svn commit: r288283 - stable/10/sys/vm

[Alan Cox]

Author: alc
Date: Sun Sep 27 01:15:17 2015
New Revision: 288283
URL: https://svnweb.freebsd.org/changeset/base/288283

Log:
  MFC r287944
    Eliminate (many) unnecessary calls to pmap_remove_all().

Modified:
  stable/10/sys/vm/vm_page.c
Directory Properties:
  stable/10/   (props changed)

Modified: stable/10/sys/vm/vm_page.c
==============================================================================
--- stable/10/sys/vm/vm_page.c	Sun Sep 27 01:06:45 2015	(r288282)
+++ stable/10/sys/vm/vm_page.c	Sun Sep 27 01:15:17 2015	(r288283)
@@ -3009,7 +3009,8 @@ vm_page_set_invalid(vm_page_t m, int bas
 		bits = VM_PAGE_BITS_ALL;
 	else
 		bits = vm_page_bits(base, size);
-	if (m->valid == VM_PAGE_BITS_ALL && bits != 0)
+	if (object->ref_count != 0 && m->valid == VM_PAGE_BITS_ALL &&
+	    bits != 0)
 		pmap_remove_all(m);
 	KASSERT((bits == 0 && m->valid == VM_PAGE_BITS_ALL) ||
 	    !pmap_page_is_mapped(m),