Messages in this thread | | | Date | Thu, 25 Nov 2004 12:13:44 +0100 | From | Ingo Molnar <> | Subject | Re: [patch] Real-Time Preemption, -RT-2.6.10-rc2-mm3-V0.7.31-0 |
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* Rui Nuno Capela <rncbc@rncbc.org> wrote:
> last thing, at the moment, that "reliably" locks up the machine is > accessing the floppy-disk (dev/fd0). Yes, I still have one here, and > it was just yesterday that I've tried to mount on it and bang! > power-off and a cold-boot follows. Reproducibility? ALWAYS is often > enough. Nothing shows up via serial console.
will take a look.
> [...] Jackd XRUN rates are pretty low and on the same level (e.g. less > than 5 per hour with the default jack_test3.1 test), [...]
could you post the jack_test summary outputs?
> Oh well. But let's get back to reality :) How can I help on fixing > this floppy showstopper? I've tried with almost every debug option set > and nothing is dumped either on syslog or serial console. The only > visible thing is that, once the floppy starts spinning (LED is on) the > machine freezes. Weird.
how hard of a freeze is it? I.e. if you log in over the text console, and do:
chrt -f 99 -p `pidof 'IRQ 1'` chrt -f 99 -p $$
can you access the sysrq keys after the freeze happens? If not, can you access them if you do:
echo 1 > /proc/sys/kernel/debug_direct_keyboard
? And finally, if the above experiments suggest that it's a hard lockup, do you have a working NMI watchdog? (i.e. do the NMI counts in /proc/interrupt increase on all CPUs?)
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