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From: Alan Cox <alc@FreeBSD.org>
Date: Thu, 14 Aug 2014 15:46:16 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r269978 - head/sys/vm
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Author: alc
Date: Thu Aug 14 15:46:15 2014
New Revision: 269978
URL: http://svnweb.freebsd.org/changeset/base/269978

Log:
  Avoid pointless (but harmless) actions on unmanaged pages.
  
  Reviewed by:	kib
  Sponsored by:	EMC / Isilon Storage Division

Modified:
  head/sys/vm/vm_fault.c

Modified: head/sys/vm/vm_fault.c
==============================================================================
--- head/sys/vm/vm_fault.c	Thu Aug 14 14:59:40 2014	(r269977)
+++ head/sys/vm/vm_fault.c	Thu Aug 14 15:46:15 2014	(r269978)
@@ -851,8 +851,9 @@ vnode_locked:
 	if (hardfault)
 		fs.entry->next_read = fs.pindex + faultcount - reqpage;
 
-	if ((prot & VM_PROT_WRITE) != 0 ||
-	    (fault_flags & VM_FAULT_DIRTY) != 0) {
+	if (((prot & VM_PROT_WRITE) != 0 ||
+	    (fault_flags & VM_FAULT_DIRTY) != 0) &&
+	    (fs.m->oflags & VPO_UNMANAGED) == 0) {
 		vm_object_set_writeable_dirty(fs.object);
 
 		/*