[src/netbsd-1-4]: src/sys/uvm pull up 1.17 -> 1.18:

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

details:   https://anonhg.NetBSD.org/src/rev/cc17285c881b
branches:  netbsd-1-4
changeset: 468290:cc17285c881b
user:      chs <chs%NetBSD.org@localhost>
date:      Fri Apr 16 16:29:34 1999 +0000

description:
pull up 1.17 -> 1.18:
add a `flags' argument to uvm_pagealloc_strat().
define a flag UVM_PGA_USERESERVE to allow non-kernel object
allocations to use pages from the reserve.
use the new flag for allocations in pmap modules.

diffstat:

 sys/uvm/uvm_page.c |  13 ++++++++-----
 1 files changed, 8 insertions(+), 5 deletions(-)

diffs (43 lines):

diff -r 86ed80ed0810 -r cc17285c881b sys/uvm/uvm_page.c
--- a/sys/uvm/uvm_page.c        Fri Apr 16 16:29:09 1999 +0000
+++ b/sys/uvm/uvm_page.c        Fri Apr 16 16:29:34 1999 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: uvm_page.c,v 1.17 1999/03/26 21:58:39 mycroft Exp $    */
+/*     $NetBSD: uvm_page.c,v 1.17.2.1 1999/04/16 16:29:34 chs Exp $    */
 
 /* 
  * Copyright (c) 1997 Charles D. Cranor and Washington University.
@@ -810,15 +810,17 @@
  */
 
 struct vm_page *
-uvm_pagealloc_strat(obj, off, anon, strat, free_list)
+uvm_pagealloc_strat(obj, off, anon, flags, strat, free_list)
        struct uvm_object *obj;
        vaddr_t off;
+       int flags;
        struct vm_anon *anon;
        int strat, free_list;
 {
        int lcv, s;
        struct vm_page *pg;
        struct pglist *freeq;
+       boolean_t use_reserve;
 
 #ifdef DIAGNOSTIC
        /* sanity check */
@@ -848,10 +850,11 @@
         *        the requestor isn't the pagedaemon.
         */
 
-       if ((uvmexp.free <= uvmexp.reserve_kernel &&
-            !(obj && obj->uo_refs == UVM_OBJ_KERN)) ||
+       use_reserve = (flags & UVM_PGA_USERESERVE) ||
+               (obj && obj->uo_refs == UVM_OBJ_KERN);
+       if ((uvmexp.free <= uvmexp.reserve_kernel && !use_reserve) ||
            (uvmexp.free <= uvmexp.reserve_pagedaemon &&
-            !(obj == uvmexp.kmem_object && curproc == uvm.pagedaemon_proc)))
+            !(use_reserve && curproc == uvm.pagedaemon_proc)))
                goto fail;
 
  again: