Author: alc
Date: Sat Apr 3 15:43:28 2010
New Revision: 206138
URL: http://svn.freebsd.org/changeset/base/206138
Log:
MFC r205652
A ptrace(2) by one process may trigger a page size promotion in the
address space of another process. Modify pmap_promote_pde() to handle
this.
Modified:
stable/8/sys/i386/i386/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)
stable/8/sys/dev/xen/xenpci/ (props changed)
Modified: stable/8/sys/i386/i386/pmap.c
==============================================================================
--- stable/8/sys/i386/i386/pmap.c Sat Apr 3 15:40:14 2010
(r206137)
+++ stable/8/sys/i386/i386/pmap.c Sat Apr 3 15:43:28 2010
(r206138)
@@ -2999,7 +2999,7 @@ pmap_promote_pde(pmap_t pmap, pd_entry_t
* either invalid, unused, or does not map the first 4KB physical page
* within a 2- or 4MB page.
*/
- firstpte = vtopte(trunc_4mpage(va));
+ firstpte = pmap_pte_quick(pmap, trunc_4mpage(va));
setpde:
newpde = *firstpte;
if ((newpde & ((PG_FRAME & PDRMASK) | PG_A | PG_V)) != (PG_A | PG_V)) {
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