Module Name: src
Committed By: hannken
Date: Tue Jan 26 14:34:50 UTC 2016
Modified Files:
src/sys/arch/x86/x86: pmap.c
Log Message:
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 -r1.189 -r1.190 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:1.189 src/sys/arch/x86/x86/pmap.c:1.190
--- src/sys/arch/x86/x86/pmap.c:1.189 Wed Nov 11 08:20:22 2015
+++ src/sys/arch/x86/x86/pmap.c Tue Jan 26 14:34:50 2016
@@ -1,4 +1,4 @@
-/* $NetBSD: pmap.c,v 1.189 2015/11/11 08:20:22 skrll Exp $ */
+/* $NetBSD: pmap.c,v 1.190 2016/01/26 14:34:50 hannken Exp $ */
/*-
* Copyright (c) 2008, 2010 The NetBSD Foundation, Inc.
@@ -171,7 +171,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.189 2015/11/11 08:20:22 skrll Exp $");
+__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.190 2016/01/26 14:34:50 hannken Exp $");
#include "opt_user_ldt.h"
#include "opt_lockdebug.h"
@@ -3746,6 +3746,7 @@ startover:
}
result = pp->pp_attrs & clearbits;
pp->pp_attrs &= ~clearbits;
+ pmap_tlb_shootnow();
kpreempt_enable();
return result != 0;
