Re: [PATCH 3/3] x86, extable: Handle early exceptions

From: Linus Torvalds
Date: Thu Apr 19 2012 - 14:11:56 EST

On Thu, Apr 19, 2012 at 10:38 AM, Borislav Petkov <bp@xxxxxxxxx> wrote:
> OTOH, if we can share early and normal exception handling lookup code, then a
> perfect hash would make sense as those exceptions would pile up.

Oh, any of this only makes sense if we can share it with the runtime
exception lookup.

They are *seldom* hugely performance-critical, but there are some
unusual loads where you do get a fair number of exceptions.

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