Re: [PATCH] x86-64: espfix for 64-bit mode *PROTOTYPE*

[H. Peter Anvin]

On 04/22/2014 06:23 PM, Andrew Lutomirski wrote:
> 
> What's the to_dmesg thing for?
> 

It's for debugging... the espfix page tables generate so many duplicate
entries that trying to output it via a seqfile runs out of memory.  I
suspect we need to do something like skip the espfix range or some other
hack.

> It looks sane, although I haven't checked the detailed register manipulation.
> 
> Users of big systems may complain when every single CPU lines up for
> that mutex.  Maybe no one cares.

Right now the whole smpboot sequence is fully serialized... that needs
to be fixed.

Konrad - I really could use some help figuring out what needs to be done
for this not to break Xen.

	-hpa

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