Messages in this thread | | | Subject | Re: [Fwd: Re: [patch] Real-Time Preemption, -RT-2.6.9-mm1-V0.4] | From | Mark_H_Johnson@raytheon ... | Date | Mon, 1 Nov 2004 10:34:22 -0600 |
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>I've uploaded -V0.6.5 to the usual place: > > http://redhat.com/~mingo/realtime-preempt/
I built with this patch and had some problems with the system locking up.
First attempt: - booted to single user without problem - telinit 5 was OK as well - logged in. After first window popped up, I did su - to get root access and the system locked up. No display updates nor any mouse movement. Entering Alt-SysRq-L displayed SysRq : Show Regs On All CPUs and no other messages appeared on the serial console. Attempts to use other Alt-SysRq keys were ignored, hard reset to reboot.
Second attempt: - booted to single user without problem - telinit 5 failed after kudzu timed out (had "detected" a change due to the serial console)
No messages on serial console after the kudzu timeout. This time Alt-SysRq-L did work. Also did Alt-SysRq-T and -D and will send the all the serial console messages separately.
Did notice an odd message during the dump of tasks... Losing too many ticks! TSC cannot be used as a timesource. Possible reasons for this are: You're running with Speedstep. [almost surely not] You don't have DMA enabled for your hard disk (see hdparm), [udma4 should be set at this point] Incorrect TSC synchronization on an SMP system (see dmesg). [can't look at that, system is hung] Falling back to a sane timesource now.
Alas, this "sane timesource" didn't help either, system still not responding right. Alt-SysRq-S said SysRq : Emergency Sync [without any complete messages] and Alt-SysRq-B did reboot the system.
--Mark H Johnson <mailto:Mark_H_Johnson@raytheon.com>
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