Messages in this thread | | | From | Alistair John Strachan <> | Subject | Re: rt-preempt and x86_64? | Date | Sun, 17 Jul 2005 21:04:40 +0100 |
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On Sunday 17 Jul 2005 17:29, Michal Schmidt wrote: > Alistair John Strachan wrote: > > Hi Ingo, > > > > (I searched the list for rt realtime x86_64 x86-64 before posting this, > > so I hope it's not a duplicate). > > > > I've noticed -31 compiles without notable error or warning on x86-64, so > > I thought maybe it was a valid time to file a bug report about it not > > working. > > > > The machine currently runs 2.6.12 but when booting with PREEMPT_RT mode > > on the same machine I get: > > > > init[1]: segfault at ffffffff8010e9c4 rip ffffffff8010e9c4 rsp > > 00007fffffe28018 > > [...] > > Do you have latency tracing enabled in the kernel config? Try disabling > it. It's a known problem that it doesn't work on x86_64. >
Thanks Michal, this was the problem. Unless x86_64 is going to receive an implementation of LATENCY_TRACE soon, it might be an idea to only let this be selectable on x86.
(Unfortunately I couldn't use the resulting kernel anyway, as my lirc modules hang the system when modprobe'd; it's probably easy even for me to fix if I inspect Ingo's rt-preempt patch.)
-- Cheers, Alistair.
'No sense being pessimistic, it probably wouldn't work anyway.' Third year Computer Science undergraduate. 1F2 55 South Clerk Street, Edinburgh, UK. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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