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From: Colin Percival <cperciva@FreeBSD.org>
Date: Thu, 6 Jan 2011 13:02:29 +0000 (UTC)
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Subject: svn commit: r217051 - stable/8/sys/i386/xen
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Author: cperciva
Date: Thu Jan  6 13:02:29 2011
New Revision: 217051
URL: http://svn.freebsd.org/changeset/base/217051

Log:
  MFC r216703: Make i386/XEN not panic when mlock(2) is used.

Modified:
  stable/8/sys/i386/xen/pmap.c
Directory Properties:
  stable/8/sys/   (props changed)
  stable/8/sys/amd64/include/xen/   (props changed)
  stable/8/sys/cddl/contrib/opensolaris/   (props changed)
  stable/8/sys/contrib/dev/acpica/   (props changed)
  stable/8/sys/contrib/pf/   (props changed)

Modified: stable/8/sys/i386/xen/pmap.c
==============================================================================
--- stable/8/sys/i386/xen/pmap.c	Thu Jan  6 12:34:18 2011	(r217050)
+++ stable/8/sys/i386/xen/pmap.c	Thu Jan  6 13:02:29 2011	(r217051)
@@ -1070,7 +1070,9 @@ pmap_pte_release(pt_entry_t *pte)
 	if ((pt_entry_t *)((vm_offset_t)pte & ~PAGE_MASK) == PADDR2) {
 		CTR1(KTR_PMAP, "pmap_pte_release: pte=0x%jx",
 		    *PMAP2);
+		vm_page_lock_queues();
 		PT_SET_VA(PMAP2, 0, TRUE);
+		vm_page_unlock_queues();
 		mtx_unlock(&PMAP2mutex);
 	}
 }