Date: Wed, 14 Nov 2018 22:18:21 +0100 From: Michael Tuexen <Michael.Tuexen@macmic.franken.de> To: Mark Millard <marklmi@yahoo.com> Cc: Justin Hibbits <chmeeedalf@gmail.com>, freebsd-ppc@freebsd.org Subject: Re: after running the installer on a PowerMac G5 no root filesystem found Message-ID: <CA36C99F-DB87-4C2F-841D-764B6FEF25C9@macmic.franken.de> In-Reply-To: <D631B613-508D-4E32-BB82-855B33E51926@yahoo.com> References: <6f6d590b-02ef-ef9c-ed58-50121142e616@blastwave.org> <15F2B2EA-2129-46A8-BAAA-5AB8A9B6478B@macmic.franken.de> <806379E7-97EE-4977-B334-B3C53522F789@macmic.franken.de> <64612e49-7798-bf2a-44b6-56cfcd3b3e80@blastwave.org> <20181114110252.68fa2070@ralga.knownspace> <C5D0E698-26F7-476D-ABB4-51812C0553D8@macmic.franken.de> <D631B613-508D-4E32-BB82-855B33E51926@yahoo.com>
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> On 14. Nov 2018, at 18:52, Mark Millard <marklmi@yahoo.com> wrote: > > > > On 2018-Nov-14, at 09:15, Michael Tuexen <Michael.Tuexen at macmic.franken.de> wrote: > >>> On 14. Nov 2018, at 18:02, Justin Hibbits <chmeeedalf at gmail.com> wrote: >>> >>> On Wed, 14 Nov 2018 11:52:45 -0500 >>> Dennis Clarke <dclarke@blastwave.org> wrote: >>> >>>> <snip> >>>>>>> >>>>>>> At first boot I get a load of text and then a strange prompt that >>>>>>> seems to be asking where is the root filesystem? It also lists >>>>>>> all the various filesystems found. I tried to enter >>>>>>> ufs:/dev/adas2 and similar things but this gets me nothing but an >>>>>>> unrecognized filesystem message. >>>>>>> >>>>>>> So .. something obvious? >>>>>> Can you try setting the variable kern.smp.disabled to 1 at the >>>>>> loader prompt? >>>>>> If that helps, you can add >>>>>> kern.smp.disabled=1 >>>>>> to /boot/leader.conf >>>>> I meant /boot/loader.conf. >>>> >>>> To do that at all I would need to be able to get to the root >>>> filesystem. >>> >>> You can do it at the loader. >>> >>> set kern.smp.disabled=1 >>> boot >>> >>>> >>>>>> I had all sorts of problems until I disabled SMP on my G5 >>>>>> PowerMacs. Without SMP they are running very stable. >>>> >>>> So FreeBSD can not run on ye old IBM PPC970 units with multiple cores >>>> or multiple sockets? That sounds like a critical bug. >>> >>> It could until recently, due to my fault. I can revert the change that >>> caused it, but haven't yet, because I don't understand why it's causing >> I think I tried a kernel with you change reverted. It didn't fix the >> problem. I can try again, but at that time the problem was not only >> related to the one commit. >> > > I'm still running with smp based on head -r339076 ( between ALPHA8 and > ALPHA9) with smp on both G5 Quad Core (system total cores), 16 GiBytes > RAM and 12 GiBytes RAM, and on G5 Dual processor, 8GiBytes RAM. (Same > SSD moved between machines.) But I reverted the change Justin is > talking about in order have smp working. I did not have to change > anything else. > > # svnlite diff /usr/src/sys/powerpc/include/vmparam.h > Index: /usr/src/sys/powerpc/include/vmparam.h > =================================================================== > --- /usr/src/sys/powerpc/include/vmparam.h (revision 339076) > +++ /usr/src/sys/powerpc/include/vmparam.h (working copy) > @@ -107,7 +107,7 @@ > > #ifdef __powerpc64__ > #define VM_MIN_KERNEL_ADDRESS 0xe000000000000000UL > -#define VM_MAX_KERNEL_ADDRESS 0xe0000007ffffffffUL > +#define VM_MAX_KERNEL_ADDRESS 0xe0000001c7ffffffUL > #define VM_MAX_SAFE_KERNEL_ADDRESS VM_MAX_KERNEL_ADDRESS > #endif > > > That revert was to have the "before -r334498" content for that file. > Andreas Tobler reported confirming my findings in his context. > > I note this mostly because Justin has reported no longer having such a > machine to test on. > > [I am slowly working on updating to 13.0 FreeBSD all the FreeBSD machines > that I have ready access to. The powerpc families will be last.] Let me retest... > >>> the problem. And I'm pretty confident it's not causing the mountroot >>> issue (though, I was pretty confident it wouldn't cause any problem >>> anyway, but that turned out to be false confidence). > > FYI: I never saw such an issue for as far as I've gotten with the > powerpc's. I saw such things, too. Best regards Michael > > > === > Mark Millard > marklmi at yahoo.com > ( dsl-only.net went > away in early 2018-Mar) >help
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