Messages in this thread | | | Date | Wed, 8 Sep 2004 00:58:13 +0100 (WEST) | Subject | Re: [patch] voluntary-preempt-2.6.9-rc1-bk12-R5 | From | "Rui Nuno Capela" <> |
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> Lee Revell wrote: >> Ingo, here is a report from a user (Rui) of a problem that seems to >> have been introduced in Q5. > > Ugh, I got Rui's address wrong in the first post, please use the one > above for any followups. Sorry. >
>Rui Nuno Capela wrote: >> >> I'm having some trouble with latest VP patches on my P4 HT/SMP box. The >> trouble is that since Q5 that I can't get my machine to boot reliably, >> if at all. It goes almost all through the init scripts to drop dead on >> the beach, so to speak. It just freezes completely somewhere before the >> login prompts. >> >> This only happens if the kernel is configured for SMP/SMT >> (HyperThreading). The very same kernel configured and built for UP >> boots and runs fine. As I said before this was introduced on the Q5 >> patch, and the same showstopper is present on latest R6. Only with Q3 >> I'm still happy, altought only with softirq-preempt=0 AND >> hardirq-preempt=0. >> >> The "offending" box is a SUSE 9.1 based one, P4 2.80C HT on a ASUS >> P4P800 mobo, 1GB DDR. >> > > I posted the above report to LKML and cc'ed you and Ingo. None of the > LKML testers are reporting this problem, it sounds very similar to the > problems others have had with SMP/HT but those were thought to all be > solved. >
Thanks Lee. Yes I was pretty excited with those reports too (I've been lurking on LKML :), but I just seem to be unlucky. That's why I've been trying one by one of the patches, from Q5 to R6 and tweaking the available options as much as I know and time permitted.
OK, could just someone with a P4 HT/SMP box hand me their working kernel .config file for me to try? That could be a good starting point, if not a plain baseline.
> > Has any version worked with softirq or hardirq preemption enabled? What > are the symptoms if you boot Q3 with either of the above enabled? >
On this box in question, softirq and hardirq-preempt options had NEVER lead to a stable SMP/HT system, ever since my first rehearsal with VP, which I think was around O3. UP is quite different, it works and always worked, as advertised :) FWIW, R6 is pumping hard on my laptop :)
Q3-SMP doesn't pass the KDE 3.3 startup splash if I set softirq=1 or hardirq=1. The system just hangs. I still keep softirq-preempt=0 and hardirq-preempt=0 as my Q3-SMP kernel bootloader parameters though.
Hope this gets cleared out. All I can do is offering my best efforts to dig this out, provided someone give me some hunch ;)
Thank you all. -- rncbc aka Rui Nuno Capela rncbc@rncbc.org
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