Module Name: src
Committed By: snj
Date: Fri Feb 26 21:50:54 UTC 2016
Modified Files:
src/sys/arch/x86/x86 [netbsd-7]: pmap.c
Log Message:
Pull up following revision(s) (requested by hannken in ticket #1100):
sys/arch/x86/x86/pmap.c: revision 1.190
Operation pmap_pp_clear_attrs() may remove the "used" attribute from a page
that is still cached in the TLB of other CPUs.
Call pmap_tlb_shootnow() here before enabling preemption to clear the
TLB entries on other CPUs.
Should prevent tmpfs data corruption under load.
Ok: Chuck Silvers
To generate a diff of this commit:
cvs rdiff -u -r1.183.2.3 -r1.183.2.4 src/sys/arch/x86/x86/pmap.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/arch/x86/x86/pmap.c
diff -u src/sys/arch/x86/x86/pmap.c:1.183.2.3 src/sys/arch/x86/x86/pmap.c:1.183.2.4
--- src/sys/arch/x86/x86/pmap.c:1.183.2.3 Fri Feb 12 10:55:35 2016
+++ src/sys/arch/x86/x86/pmap.c Fri Feb 26 21:50:54 2016
@@ -1,4 +1,4 @@
-/* $NetBSD: pmap.c,v 1.183.2.3 2016/02/12 10:55:35 snj Exp $ */
+/* $NetBSD: pmap.c,v 1.183.2.4 2016/02/26 21:50:54 snj Exp $ */
/*-
* Copyright (c) 2008, 2010 The NetBSD Foundation, Inc.
@@ -171,7 +171,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.183.2.3 2016/02/12 10:55:35 snj Exp $");
+__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.183.2.4 2016/02/26 21:50:54 snj Exp $");
#include "opt_user_ldt.h"
#include "opt_lockdebug.h"
@@ -3867,6 +3867,7 @@ startover:
}
result = pp->pp_attrs & clearbits;
pp->pp_attrs &= ~clearbits;
+ pmap_tlb_shootnow();
kpreempt_enable();
return result != 0;
