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[Xen-users] Debian lenny and the TLS warning

  • To: Xen-users@xxxxxxxxxxxxxxxxxxx
  • From: Andreas Sommer <AndiDog@xxxxxx>
  • Date: Fri, 21 Aug 2009 09:52:16 +0100
  • Cc:
  • Delivery-date: Fri, 21 Aug 2009 01:53:51 -0700
  • List-id: Xen user discussion <xen-users.lists.xensource.com>

I have set up Debian lenny domains using debootstrap (similar to the tutorial on http://www.option-c.com/xwiki/Create_a_Debian_VM_with_debootstrap). As most tutorials say, /lib/tls should be renamed to /lib/tls.disabled - but that file doesn't even exist on Lenny?! Anyway, this shouldn't be a problem because I installed libc6-xen on the guest domain, but I still get this warning:

  ** WARNING: Currently emulating unsupported memory accesses  **
  **          in /lib/tls glibc libraries. The emulation is    **
  **          slow. To ensure full performance you should      **
  **          install a 'xen-friendly' (nosegneg) version of   **
  **          the library, or disable tls support by executing **
  **          the following as root:                           **
  **          mv /lib/tls /lib/tls.disabled                    **
  ** Offending process: init (pid=701)                         **

I guess the init process is statically linked against a normal xen-unfriendly libc?? If yes, how do I replace it with a xen-friendly init and does that prevent my dom0 mouse cursor from stuttering when I start/shutdown domains (i.e. is there a performance difference ;-) ?

Best regards
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