Re: Reset problem vs. MMIO emulation, hypercalls, etc...

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On 08/08/2012 02:59 PM, David Gibson wrote:
>> 
>> No, you're correct.  HLT could have been emulated in userspace, it just
>> wasn't.  The correct statement is that HLT was arbitrarily chosen to be
>> emulated in userspace with the synchronous model, but the asynchronous
>> model forced it into the kernel.
> 
> Aha!  Ok, understood.  Uh, assuming you meant kernelspace, not
> userspace in the first line there, anyway.  

I did.

> Ok, so I am now reassured
> that our current handling of CEDE in kernelspace does not cause
> problems.

Great.  It's a real pity the original local APIC implementation was in
userspace, it causes no end of confusion, and in fact was broken for smp
until recently even though it is 7 years old.

-- 
error compiling committee.c: too many arguments to function
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