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

Linus Torvalds
2012-04-19T18:11:59Z

On Thu, Apr 19, 2012 at 10:38 AM, Borislav Petkov <bp@amd64.org> 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.

Linus