> I can't speak for the SuSE package, but on FC5 glibc picks up the right
> TLS version automatically too. You can check it's working with
>
> $ cat /proc/self/maps
>
> which on my local i386 dom0 shows:
>
> /lib/i686/nosegneg/libc-2.4.so
>
> as the libc in use, showing it is detecting and using the "nosegneg"
> Xen-friendly version automatically. SuSE may well be using a similar
> scheme.
IIRC, SuSE's TLS just never uses negative segment references, even on native - 
I understood they didn't find the performance advantages justified the extra 
complexity switching for Xen-vs-native.
Cheers,
Mark
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