Re: [PATCH RFC/RFB] x86_64, i386: interrupt dispatch changes

From: H. Peter Anvin
Date: Wed Nov 05 2008 - 13:06:52 EST


Cyrill Gorcunov wrote:
>
> Ingo, what the conclusion is? As I understand from the thread --
>
> 1) Implement Peter's proposed cleanup/compress.
> 2) Test Alexander's patche.
>
> Did I miss something?
>

Nope, that's pretty much it.

However, there are good reason to believe that using this kind of
segment selector tricks is probably a bad idea in the long term,
especially since CPU vendors have strong incentives to reduce the size
of the segment descriptor cache now when none of the mainstream OSes
rely on more than a small handful of segments.

I was planning to look at doing the obvious stub shrink today.

-hpa
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