Messages in this thread | | | Subject | Re: [PATCH] Use correct x86 reboot vector | From | (Eric W. Biederman) | Date | 11 May 2003 12:01:57 -0600 |
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Alan Cox <alan@lxorguk.ukuu.org.uk> writes:
> On Sad, 2003-05-10 at 04:35, CaT wrote: > > On Sat, May 10, 2003 at 04:56:34AM +0200, Andi Kleen wrote: > > > Extensive discussion by various experts on the discuss@x86-64.org > > > mailing list concluded that the correct vector to restart an 286+ > > > CPU is f000:fff0, not ffff:0000. Both seem to work on current systems, > > > but the first is correct. > > > > Could this bug, by any chance, cause a system to shutdown instead of > > rebooting? This is what happens to me at the moment but not each and > > every time. > > Unlikely. But try it and see 8) > > At least some SMP boxes freak if you do a poweroff request on CPU != 0
As per the MP spec. The system should reboot on the bootstrap cpu. smp_processor_id() == 0 on x86. apicid??
I have a patch for this as part my kexec stuff as the kernel freaks when it doesn't start up on the bootstrap cpu as well. I am busily cleaning it up so it works in interrupt context as well.
Alan if you want it holler and I can send it to you as well.
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