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Re: [Xen-users] xen 3.1.1 with centos5 (/lib/tls error)

To: "Nico Kadel-Garcia" <nkadel@xxxxxxxxx>
Subject: Re: [Xen-users] xen 3.1.1 with centos5 (/lib/tls error)
From: "Anand Gupta" <xen.mails@xxxxxxxxx>
Date: Mon, 29 Oct 2007 15:38:17 +0530
Cc: Xen Users <Xen-users@xxxxxxxxxxxxxxxxxxx>
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On 10/28/07, Nico Kadel-Garcia <nkadel@xxxxxxxxx> wrote:
Anand Gupta wrote:
> Hi,
> I am using xen 3.1.1 on centos5, and getting the below message inside domU
>   ***************************************************************
>   ***************************************************************
>   ** 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: modprobe (pid=907)                     **
>   ***************************************************************
>   ***************************************************************
> I have however checked and the /lib/tls is already renamed as
> /lib/tls.disabled, however the above message pops up on every bootup.
> Is there any other way to get rid of this ?
> dom0 : Centos 5
> domU : Centos 5
> xen 3.1.1 : hand compiled (not using centos5 xen packages)
> --
> regards,
> Anand Gupta
Well, you could recompile glibc with the TLS support turned off. And
make sure that your /etc/ld.so.conf.d/ did not get oddnesses done, or
some LD_* variables don't make things look in /lib/tls.disabled,
although that seems unlikely.

Hmm... that would be ok as well, however similar situation has never arised with versions prior to centos 5. I have numerous servers running centos 4.5, and none of them have similar problems. Atleast by renaming the tls directory it should stop giving the error.

P.S. : The directory /lib/tls is empty, so it actually shouldn't make any difference at all.


Anand Gupta
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