Date: Thu, 15 Nov 2018 21:13:57 +0100 From: Andreas Tobler <andreast-list@fgznet.ch> To: Michael Tuexen <Michael.Tuexen@macmic.franken.de>, Justin Hibbits <chmeeedalf@gmail.com> Cc: freebsd-ppc@freebsd.org Subject: Re: after running the installer on a PowerMac G5 no root filesystem found Message-ID: <1635791e-6c4e-52f3-a5ad-739f1b143040@fgznet.ch> In-Reply-To: <29EA3221-8788-4528-BEB2-AF38A9FF1D56@macmic.franken.de> 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> <29EA3221-8788-4528-BEB2-AF38A9FF1D56@macmic.franken.de>
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On 15.11.18 21:05, Michael Tuexen wrote: >> On 14. Nov 2018, at 18:02, Justin Hibbits <chmeeedalf@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 >> 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). > OK, I did some testing. Reverting r334498 and not disabling smp results > in a usable, stable system. However, there are two things I observed that > are not working as good as with disabling smp: > > 1. After a while the fans get louder. Running sysctl -a dev.fcu.0 > gets them down again. After a while they will start to get > louder again. > When SMP is disabled, this is not an issue. pmac_therm gets stuck, we already had that, r329080 tried to fix this. It worked a while but now things are back to worse. > 2. When shutting down the system, > 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... > times out. > This is also not an issue when SMP is disabled. > > So there are some issue with SMP even when reverting r334498. I second the two points above, iow I see the same on different SMP G5 running 64-bit. For me both are related. Gruss, Andreas
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