[src/trunk]: src/sys/rump/librump/rumpkern update the rump copy of uvm_page_u...

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

details:   https://anonhg.NetBSD.org/src/rev/5b4f15b35e1b
branches:  trunk
changeset: 946664:5b4f15b35e1b
user:      chs <chs%NetBSD.org@localhost>
date:      Sat Dec 05 19:08:50 2020 +0000

description:
update the rump copy of uvm_page_unbusy() to match the real version,
in particular handle PG_PAGEOUT.  fixes a few atf tests.

diffstat:

 sys/rump/librump/rumpkern/vm.c |  35 ++++++++++++++++++++++++++++++-----
 1 files changed, 30 insertions(+), 5 deletions(-)

diffs (73 lines):

diff -r 48745fba8131 -r 5b4f15b35e1b sys/rump/librump/rumpkern/vm.c
--- a/sys/rump/librump/rumpkern/vm.c    Sat Dec 05 19:06:51 2020 +0000
+++ b/sys/rump/librump/rumpkern/vm.c    Sat Dec 05 19:08:50 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: vm.c,v 1.190 2020/06/11 19:20:46 ad Exp $      */
+/*     $NetBSD: vm.c,v 1.191 2020/12/05 19:08:50 chs Exp $     */
 
 /*
  * Copyright (c) 2007-2011 Antti Kantee.  All Rights Reserved.
@@ -41,7 +41,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: vm.c,v 1.190 2020/06/11 19:20:46 ad Exp $");
+__KERNEL_RCSID(0, "$NetBSD: vm.c,v 1.191 2020/12/05 19:08:50 chs Exp $");
 
 #include <sys/param.h>
 #include <sys/atomic.h>
@@ -673,26 +673,51 @@
 uvm_page_unbusy(struct vm_page **pgs, int npgs)
 {
        struct vm_page *pg;
-       int i;
+       int i, pageout_done;
 
        KASSERT(npgs > 0);
-       KASSERT(rw_write_held(pgs[0]->uobject->vmobjlock));
 
+       pageout_done = 0;
        for (i = 0; i < npgs; i++) {
                pg = pgs[i];
-               if (pg == NULL)
+               if (pg == NULL || pg == PGO_DONTCARE) {
                        continue;
+               }
 
+#if 0
+               KASSERT(uvm_page_owner_locked_p(pg, true));
+#else
+               /*
+                * uvm_page_owner_locked_p() is not available in rump,
+                * and rump doesn't support amaps anyway.
+                */
+               KASSERT(rw_write_held(pg->uobject->vmobjlock));
+#endif
                KASSERT(pg->flags & PG_BUSY);
+
+               if (pg->flags & PG_PAGEOUT) {
+                       pg->flags &= ~PG_PAGEOUT;
+                       pg->flags |= PG_RELEASED;
+                       pageout_done++;
+                       atomic_inc_uint(&uvmexp.pdfreed);
+               }
                if (pg->flags & PG_RELEASED) {
+                       KASSERT(pg->uobject != NULL ||
+                           (pg->uanon != NULL && pg->uanon->an_ref > 0));
+                       pg->flags &= ~PG_RELEASED;
                        uvm_pagefree(pg);
                } else {
+                       KASSERT((pg->flags & PG_FAKE) == 0);
                        pg->flags &= ~PG_BUSY;
                        uvm_pagelock(pg);
                        uvm_pagewakeup(pg);
                        uvm_pageunlock(pg);
+                       UVM_PAGE_OWN(pg, NULL);
                }
        }
+       if (pageout_done != 0) {
+               uvm_pageout_done(pageout_done);
+       }
 }
 
 void