* Jeremy Fitzhardinge <[email protected]> wrote:
> Ingo Molnar wrote:
> > but it does not actually use the 'normal usermode TLS selector' - it
> > only loads it.
> >
> > a meaningful test would be to allocate two selector values and load and
> > read+write memory through both of them.
> >
>
> Well, obviously in one case it would need to switch between
> null/non-null/null. But yes, good point about using the "usermode"
> %gs each iteration. I'll do some more tests.
i'd not even use glibc's %gs but set up two separate selectors. (that's
a more controlled experiment - someone might run a non-TLS glibc, etc.)
Ingo
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