PowerMac G5 4-core (system total): head variant automatically booting smp fine (no VM_MAX_KERNEL_ADDRESS workaround); but shutdown issue

[Mark Millard]

Based on my:

# uname -apKU
FreeBSD FBSDG5L 13.0-CURRENT FreeBSD 13.0-CURRENT #6 r341836M: Mon Jan 28 14:42:29 PST 2019     markmi at FBSDFSSD:/usr/obj/powerpc64vtsc_xtoolchain-gcc/powerpc.powerpc64/usr/src/powerpc.powerpc64/sys/GENERIC64vtsc-NODBG  powerpc powerpc64 1300005 1300005

with:

# svnlite diff /usr/src/sys/powerpc/include/vmparam.h                                                                                                                                        
#

(So no VM_MAX_KERNEL_ADDRESS workaround.)
And:

# svnlite diff /usr/src/stand/common/metadata.c
Index: /usr/src/stand/common/metadata.c
===================================================================
--- /usr/src/stand/common/metadata.c	(revision 341836)
+++ /usr/src/stand/common/metadata.c	(working copy)
@@ -322,15 +322,10 @@
 #if defined(LOADER_FDT_SUPPORT)
     /* Copy out FDT */
     fdtp = 0;
-#if defined(__powerpc__)
-    if (getenv("usefdt") != NULL)
+    size = fdt_copy(addr);
+    fdtp = addr;
+    addr = roundup(addr + size, PAGE_SIZE);
 #endif
-    {
-	size = fdt_copy(addr);
-	fdtp = addr;
-	addr = roundup(addr + size, PAGE_SIZE);
-    }
-#endif
 
     kernend = 0;
     kfp = file_findfile(NULL, kern64 ? "elf64 kernel" : "elf32 kernel");

(So the previous usefdt=1 behavior is automatic.)

Booting is then automatic, with smp working.

So I expect that when -r341614 (that made set usefdt=1 work) is merged to
stable/12 that the same will be true for the additional updates there.


I will note the following (adjusted from a previously reported
experiment with manual usefdt=1 use):

1. After a while the fans get louder.

2. When shutting down the system once the fans are louder,

  Waiting (max 60 seconds) for system thread `bufdaemon' to stop...
  Waiting (max 60 seconds) for system thread `bufspacedaemon-1' to stop...
  Waiting (max 60 seconds) for system thread `bufspacedaemon-0' to stop...

  all time out.

So there seems to be some type of a problem.

===
Mark Millard
marklmi at yahoo.com
( dsl-only.net went
away in early 2018-Mar)