Re: [Xen-users] 64bit dom0, 32bit domU, glibc?

[Nico Kadel-Garcia <nkadel@xxxxxxxxx>]

Mark Williamson wrote:
> > i'm using xen 3.1 and i have a 64bit dom0 and 32bit (PAE enabled) domUs
> > (32bit userland and kernels). Do I still need to replace glibc w/ one
> > compiled with -mno-tls-refs in the domUs? I don't get the warning about
> > glibc during the domU boots.
> >     
> No, you don't need to do that.
>
> The TLS refs problem happened because 32-bit Xen and glibc both want to do 
> crazy things with the processor's segmentation hardware.  32-bit Xen needs 
> the segmentation for its own protection.
> 64-bit Xen doesn't protect itself using segmentation, so it's not necessary to 
> do anything to prevent a conflict with glibc.
>   
That old problem also seemed to involve the libraries in /lib/tls. It 
was easy to just move them aside to /lib/tls.old, and current versions 
of RedHat kernels drop a little file called "kernelcap" in 
/etc/ld.so.conf.d/ that helps prevent the use of those libraries.
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