[src/trunk]: src/sys/uvm/pmap There's no need to call pmap_tlb_invalidate_add...

[skrll <skrll%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/948903a14239
branches:  trunk
changeset: 826471:948903a14239
user:      skrll <skrll%NetBSD.org@localhost>
date:      Thu Sep 07 06:29:47 2017 +0000

description:
There's no need to call pmap_tlb_invalidate_addr if pmap_remove_all was
called and PMAP_DEFERRED_ACTIVATE is set.

diffstat:

 sys/uvm/pmap/pmap.c |  25 +++++++++++++++----------
 1 files changed, 15 insertions(+), 10 deletions(-)

diffs (53 lines):

diff -r 81611034c412 -r 948903a14239 sys/uvm/pmap/pmap.c
--- a/sys/uvm/pmap/pmap.c       Thu Sep 07 04:40:56 2017 +0000
+++ b/sys/uvm/pmap/pmap.c       Thu Sep 07 06:29:47 2017 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: pmap.c,v 1.35 2017/06/24 07:30:17 skrll Exp $  */
+/*     $NetBSD: pmap.c,v 1.36 2017/09/07 06:29:47 skrll Exp $  */
 
 /*-
  * Copyright (c) 1998, 2001 The NetBSD Foundation, Inc.
@@ -67,7 +67,7 @@
 
 #include <sys/cdefs.h>
 
-__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.35 2017/06/24 07:30:17 skrll Exp $");
+__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.36 2017/09/07 06:29:47 skrll Exp $");
 
 /*
  *     Manages physical address maps.
@@ -774,10 +774,12 @@
                pmap_md_tlb_miss_lock_enter();
                const pt_entry_t npte = pte_nv_entry(is_kernel_pmap_p);
                pte_set(ptep, npte);
-               /*
-                * Flush the TLB for the given address.
-                */
-               pmap_tlb_invalidate_addr(pmap, va);
+               if (__predict_true(!(pmap->pm_flags & PMAP_DEFERRED_ACTIVATE))) {
+                       /*
+                        * Flush the TLB for the given address.
+                        */
+                       pmap_tlb_invalidate_addr(pmap, va);
+               }
                pmap_md_tlb_miss_lock_exit();
 
                /*
@@ -903,10 +905,13 @@
                }
                pmap_md_tlb_miss_lock_enter();
                pte_set(ptep, npte);
-               /*
-                * Flush the TLB for the given address.
-                */
-               pmap_tlb_invalidate_addr(pmap, sva);
+               if (__predict_true(!(pmap->pm_flags & PMAP_DEFERRED_ACTIVATE))) {
+
+                       /*
+                        * Flush the TLB for the given address.
+                        */
+                       pmap_tlb_invalidate_addr(pmap, sva);
+               }
                pmap_md_tlb_miss_lock_exit();
        }