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: >=20 >=20 >=20 > On 2018-Nov-14, at 09:15, Michael Tuexen <Michael.Tuexen at = macmic.franken.de> wrote: >=20 >>> On 14. Nov 2018, at 18:02, Justin Hibbits <chmeeedalf at gmail.com> = wrote: >>>=20 >>> On Wed, 14 Nov 2018 11:52:45 -0500 >>> Dennis Clarke <dclarke@blastwave.org> wrote: >>>=20 >>>> <snip> >>>>>>>=20 >>>>>>> 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. >>>>>>>=20 >>>>>>> So .. something obvious? =20 >>>>>> Can you try setting the variable kern.smp.disabled to 1 at the >>>>>> loader prompt? >>>>>> If that helps, you can add >>>>>> kern.smp.disabled=3D1 >>>>>> to /boot/leader.conf =20 >>>>> I meant /boot/loader.conf. =20 >>>>=20 >>>> To do that at all I would need to be able to get to the root >>>> filesystem. >>>=20 >>> You can do it at the loader. >>>=20 >>> set kern.smp.disabled=3D1 >>> boot >>>=20 >>>>=20 >>>>>> I had all sorts of problems until I disabled SMP on my G5 >>>>>> PowerMacs. Without SMP they are running very stable. =20 >>>>=20 >>>> So FreeBSD can not run on ye old IBM PPC970 units with multiple = cores >>>> or multiple sockets? That sounds like a critical bug. >>>=20 >>> 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. >>=20 >=20 > 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. >=20 > # svnlite diff /usr/src/sys/powerpc/include/vmparam.h > Index: /usr/src/sys/powerpc/include/vmparam.h > =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D > --- /usr/src/sys/powerpc/include/vmparam.h (revision 339076) > +++ /usr/src/sys/powerpc/include/vmparam.h (working copy) > @@ -107,7 +107,7 @@ >=20 > #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 >=20 >=20 > That revert was to have the "before -r334498" content for that file. > Andreas Tobler reported confirming my findings in his context. >=20 > I note this mostly because Justin has reported no longer having such a > machine to test on. >=20 > [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... >=20 >>> 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). >=20 > 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 >=20 >=20 > =3D=3D=3D > Mark Millard > marklmi at yahoo.com > ( dsl-only.net went > away in early 2018-Mar) >=20
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