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

[Mark Millard]

[The bug*daemon time-outs during shutdown also happen without fan-speed
issues happening first (or during shutdown).]

On 2019-Jan-28, at 18:16, Mark Millard <marklmi at yahoo.com> wrote:

> 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.

Experiments with booting and then shutting down somewhat
later show that the bug*daemon time-outs during shutdown
also happen without the fan's becoming loud first. They
seem independent at this point.

I'll keep experimenting on occasion.

Oh: I did not mean to imply that only the -0 and the -1 of the
various bufspaceddaemon-* timeout. I just did not list them all.

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