Module Name: src
Committed By: ad
Date: Wed May 27 19:15:08 UTC 2020
Modified Files:
src/sys/arch/x86/x86: svs.c
Log Message:
svs_pmap_sync(): Fast-path the curcpu case. Could be improved further
with a kcpuset iterator thing.
To generate a diff of this commit:
cvs rdiff -u -r1.35 -r1.36 src/sys/arch/x86/x86/svs.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/svs.c
diff -u src/sys/arch/x86/x86/svs.c:1.35 src/sys/arch/x86/x86/svs.c:1.36
--- src/sys/arch/x86/x86/svs.c:1.35 Sat May 2 11:37:17 2020
+++ src/sys/arch/x86/x86/svs.c Wed May 27 19:15:08 2020
@@ -1,7 +1,7 @@
-/* $NetBSD: svs.c,v 1.35 2020/05/02 11:37:17 maxv Exp $ */
+/* $NetBSD: svs.c,v 1.36 2020/05/27 19:15:08 ad Exp $ */
/*
- * Copyright (c) 2018-2019 The NetBSD Foundation, Inc.
+ * Copyright (c) 2018-2020 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
@@ -30,7 +30,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: svs.c,v 1.35 2020/05/02 11:37:17 maxv Exp $");
+__KERNEL_RCSID(0, "$NetBSD: svs.c,v 1.36 2020/05/27 19:15:08 ad Exp $");
#include "opt_svs.h"
#include "opt_user_ldt.h"
@@ -575,6 +575,18 @@ svs_pmap_sync(struct pmap *pmap, int ind
KASSERT(kpreempt_disabled());
KASSERT(index < PDIR_SLOT_USERLIM);
+ ci = curcpu();
+ cid = cpu_index(ci);
+
+ mutex_enter(&ci->ci_svs_mtx);
+ KASSERT(kcpuset_isset(pmap->pm_kernel_cpus, cid));
+ ci->ci_svs_updir[index] = pmap->pm_pdir[index];
+ mutex_exit(&ci->ci_svs_mtx);
+
+ if (!kcpuset_isotherset(pmap->pm_kernel_cpus, cid)) {
+ return;
+ }
+
for (CPU_INFO_FOREACH(cii, ci)) {
cid = cpu_index(ci);
