Messages in this thread | | | Subject | Re: [patch] Real-Time Preemption, -VP-2.6.9-rc4-mm1-U3 | From | Mark_H_Johnson@raytheon ... | Date | Fri, 15 Oct 2004 11:56:20 -0500 |
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>i have released the -U3 PREEMPT_REALTIME patch: > > http://redhat.com/~mingo/voluntary-preempt/voluntary-preempt-2.6.9-rc4-mm1-U3
> Built without any problems, booted as single user and had no errors until I started running init scripts.
First attempt - When I got to S10network start, had a couple messages displayed about sleeping in invalid contexts (scrolled by too fast). It ended with a kernel bug, looked similar to what I reported before. The new data displayed included:
preempt count: 4 entry 1: schedule+0x46/0x810 / (ksoftirqd+0xd4/0xf0) entry 2: _spin_lock_irqsave+0x1f/0x80 / (schedule+0x108/0x810) entry 3: _spin_lock+0x67/0x70 / (load_balance_newidle+0x66/0xc0) entry 4: _spin_lock+0x67/0x70 / (die_nmi+0x1b/0xa0)
System locked up, hardware reset to reboot. After reboot, noticed I did capture some data, will send that separately.
Second attempt - basically the same symptom. The kernel BUG output was incomplete with a "preempt count: 4" but only one entry displayed (same as entry 1 above).
System locked up, hardware reset to reboot. Will boot with max_cpus=1 to see if I get farther.
Third attempt - had two outputs of tracing data while starting the network interface. Tried a couple ping commands with numeric destinations and the machine had no response (displayed) on the first one, Ctrl-C to abort. On the second try, the system responded the same until I hit Ctrl-C, no response. Alt-SysRq-T did display task data, ping was in D mode, and call trace was pretty deep. Thought it was somewhat odd that it (and several tasks above it) had a preempt count:1 with entry 1: _spin_lock+0x1f/0x70 / (__handle_sysrq+0x1f/0xf0) not sure if that is the expected behavior or not.
Alt-SysRq-S had the same traceback as I reported before. Rebooted with Alt-SysRq-B.
As mentioned before, will send the system log data in a separate message.
--Mark H Johnson <mailto:Mark_H_Johnson@raytheon.com>
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