svn commit: r189675 - head/sys/powerpc/aim

[Nathan Whitehorn]

Author: nwhitehorn
Date: Wed Mar 11 03:19:19 2009
New Revision: 189675
URL: http://svn.freebsd.org/changeset/base/189675

Log:
  Change the PVO zone for fictitious pages to the unmanaged PVO zone, to match
  the unmanaged flag set in the PVO attributes. Without doing this,
  pmap_remove() could try to remove fictitious pages (like those created
  by mmap of physical memory) from the wrong UMA zone, causing a panic.
  
  Reported by:	Justin Hibbits
  MFC after:	1 week

Modified:
  head/sys/powerpc/aim/mmu_oea.c

Modified: head/sys/powerpc/aim/mmu_oea.c
==============================================================================
--- head/sys/powerpc/aim/mmu_oea.c	Wed Mar 11 03:00:40 2009	(r189674)
+++ head/sys/powerpc/aim/mmu_oea.c	Wed Mar 11 03:19:19 2009	(r189675)
@@ -1081,8 +1081,11 @@ moea_enter_locked(pmap_t pmap, vm_offset
 	PMAP_LOCK_ASSERT(pmap, MA_OWNED);
 
 	/* XXX change the pvo head for fake pages */
-	if ((m->flags & PG_FICTITIOUS) == PG_FICTITIOUS)
+	if ((m->flags & PG_FICTITIOUS) == PG_FICTITIOUS) {
+		pvo_flags &= ~PVO_MANAGED;
 		pvo_head = &moea_pvo_kunmanaged;
+		zone = moea_upvo_zone;
+	}
 
 	/*
 	 * If this is a managed page, and it's the first reference to the page,