[src/trunk]: src/sys/kern call pmap_update() after pmap_enter()s

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

details:   https://anonhg.NetBSD.org/src/rev/209fd2abdfa9
branches:  trunk
changeset: 515250:209fd2abdfa9
user:      jdolecek <jdolecek%NetBSD.org@localhost>
date:      Thu Sep 20 19:09:13 2001 +0000

description:
call pmap_update() after pmap_enter()s
ALWAYS call uvm_unloanpage() in cleanup - it's necessary even
in pipe_loan_free() case, since uvm_km_free() doesn't seem
to implicitly unloan the loaned pages

diffstat:

 sys/kern/sys_pipe.c |  7 ++++---
 1 files changed, 4 insertions(+), 3 deletions(-)

diffs (30 lines):

diff -r 635cf4dae01f -r 209fd2abdfa9 sys/kern/sys_pipe.c
--- a/sys/kern/sys_pipe.c       Thu Sep 20 16:57:43 2001 +0000
+++ b/sys/kern/sys_pipe.c       Thu Sep 20 19:09:13 2001 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: sys_pipe.c,v 1.11 2001/07/26 14:14:28 jdolecek Exp $   */
+/*     $NetBSD: sys_pipe.c,v 1.12 2001/09/20 19:09:13 jdolecek Exp $   */
 
 /*
  * Copyright (c) 1996 John S. Dyson
@@ -1060,6 +1060,7 @@
        for(j=0; j < npages; j++, kva += PAGE_SIZE)
                pmap_enter(pmap_kernel(), kva, res[j]->phys_addr,
                        VM_PROT_READ, 0);
+       pmap_update(pmap_kernel());
 
        wpipe->pipe_state |= PIPE_DIRECTW;
        error = 0;
@@ -1081,10 +1082,10 @@
 
     cleanup:
        pipelock(wpipe, 0);
+       if (res)
+               uvm_unloanpage(res, npages);
        if (error || amountpipekva > maxpipekva)
                pipe_loan_free(wpipe);
-       else if (res)
-               uvm_unloanpage(res, npages);
        pipeunlock(wpipe);
 
        if (error == EPIPE) {