This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
Home Products Support Community News


RE: [Xen-users] Debian lenny and the TLS warning

To: "Andreas Sommer" <AndiDog@xxxxxx>,<Xen-users@xxxxxxxxxxxxxxxxxxx>
Subject: RE: [Xen-users] Debian lenny and the TLS warning
From: "Robert Dunkley" <Robert@xxxxxxxxx>
Date: Fri, 21 Aug 2009 10:35:18 +0100
Delivery-date: Fri, 21 Aug 2009 02:36:11 -0700
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
List-help: <mailto:xen-users-request@lists.xensource.com?subject=help>
List-id: Xen user discussion <xen-users.lists.xensource.com>
List-post: <mailto:xen-users@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=unsubscribe>
References: <4A8E6040.7040600@xxxxxx>
Sender: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
Thread-index: AcoiPQtvP551Hf9PQPuSPHJgJQYk9AABFa6A
Thread-topic: [Xen-users] Debian lenny and the TLS warning



This is a neat fix for this problem with RHEL/Centos, might work with Debian (?):


create a file called /etc/ld.so.conf.d/nosegneg.conf that contains this:


# This directive teaches ldconfig to search in nosegneg subdirectories

# and cache the DSOs there with extra bit 0 set in their hwcap match

# fields.  In Xen guest kernels, the vDSO tells the dynamic linker to

# search in nosegneg subdirectories and to match this extra hwcap bit

# in the ld.so.cache file.

hwcap 0 nosegneg





From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Andreas Sommer
Sent: 21 August 2009 09:52
To: Xen-users@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-users] Debian lenny and the TLS warning


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

The SAQ Group

Registered Office: 18 Chapel Street, Petersfield, Hampshire GU32 3DZ
SAQ is the trading name of SEMTEC Limited. Registered in England & Wales
Company Number: 06481952


http://www.saqnet.co.uk AS29219

SAQ Group Delivers high quality, honestly priced communication and I.T. services to UK Business.

Broadband : Domains : Email : Hosting : CoLo : Servers : Racks : Transit : Backups : Managed Networks : Remote Support.


 SAQ Group


ISPA Member

Xen-users mailing list
<Prev in Thread] Current Thread [Next in Thread>