Subject: Re: [linux-audio-dev] VP kernels
From: Ingo Molnar (mingo_AT_elte.hu)
Date: Thu Sep 23 2004 - 23:25:52 EEST
* Rui Nuno Capela <rncbc_AT_rncbc.org> wrote:
> All my VP trials have been conducted with ALL those CONFIG_ options
> turned ON. I've been just tweaking on softirq-preempt and
> hardirq-preempt boot prompt arguments. However tweaking these only
> affects the ability for running jackd -R without instant lockup.
> Again, the only viable combination has been softirq-preempt=0 and
> hardirq-preempt=0.
>
> Rest assured that's when I unset CONFIG_SCHED_SMT things get pretty
> much better.
ok, some progress: managed to reproduce the jackd instant lockup on my
P4 HT SMP box. (hacked my kernel to ignore the second CPU's ACPI entries
so that i got a single-physical-CPU HT setup. The box has the same i8x0
sound stuff as your box.)
not much debug info yet, but it's not a classic hard lockup. It rather
seems to be jackd (or the kernel) looping indefinitely. Keyboard doesnt
work because it's threaded by default ...
more later.
Ingo
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