[Xen-users] Re: Xen and TLS, -mno-tls-direct-seg-refs needed?

["Molle Bestefich" <molle.bestefich@xxxxxxxxx>]

Sven Köhler wrote:
> Yes, but what you describe is kernel-internal. But the
> "-mno-tls-direct-seg-refs" is glibc-specific and changes glibc-internal
> things, not kernel-internal things.
Yes, but what I was implying (but not writing - sorry), was that since
the 4 GB address space is virtual, and Xen does not live within it,
there's no need for Xen to fiddle with segments for protection
purposes, and thus it probably doesn't.  And so there wouldn't be a
performance penalty.

> But who knows? :-)
Not me, I just keep ranting :-).

I hope Mats can answer it when he comes around; he seems to have quite
a lot of knowledge on all things CPU and I've seen him help out people
in xen-users quite a lot.

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