Re: [patch] x86: fix ESP corruption CPU bug (take 2)

[Jan Beulich]

>>>Do you mean, eg, this?
>>>http://www.ussg.iu.edu/hypermail/linux/kernel/0409.2/1533.html 
>> No, I don't. This talks about going through ring 1 intermediately,
>> which isn't what I have in mind.
>Well, like I said, 2 approaches do use the
>kernel stack for the 16bit stack. One approach
>uses ring-1 trampoline, the other one doesn't.
>The posting I pointed to, was explicit about
>the stack usage, but as for the ring-0 approach
>while still using the kernel stack - here it is:
>http://www.ussg.iu.edu/hypermail/linux/kernel/0410.0/1402.html 
>
>Is this what you mean? This is pretty much all
>about it, the third approach is in the kernel,
>and there were no more, even under discussion.

Yes, this comes close. Still, I'm more interested to understand why
this approach was *not* chosen, which doesn't seem to be covered by any
of the (only two) followups.

Thanks again, Jan

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