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Re: [Xen-users] xenU/glibc/nptl on RHEL 4/Centos 4.1
- To: Ted Kaczmarek <tedkaz@xxxxxxxxxxxxx>
- From: The Smoking Man <datashark@xxxxxxxxx>
- Date: Wed, 12 Oct 2005 01:32:36 +0100
- Cc: xen users mailing list <xen-users@xxxxxxxxxxxxxxxxxxx>, Jeb Campbell <jebc@xxxxxxxxxxxxxxx>
- Delivery-date: Wed, 12 Oct 2005 00:30:02 +0000
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- List-id: Xen user discussion <xen-users.lists.xensource.com>
The jailtime.org images disable NPTL (by moving /lib/tls –>
/lib/tls.disabled). Some apps b0rk with this. With NPTL enabled xenU
are slower *except* if the glibc is recompiled with a special gcc flag
(-mno-tls-direct-seg-refs). Centos/RHEL is no gentoo and rebuilding
glibc proved to be tricky, so i 'm in search of a kinda soul
with the same needs as i am that was able to rebuild glibc (with
-mno-tls-direct-seg-refs) and kinda enough to share the new rpms...
All the Best...
António.
On 10/12/05, Ted Kaczmarek <tedkaz@xxxxxxxxxxxxx> wrote:
On Tue, 2005-10-11 at 08:44 -0500, Jeb Campbell wrote:
> The Smoking Man wrote:
> > Anyone have rebuilt glibc (x86/32) rpms for RHEL 4/Centos 4.1 with the
> > gcc's -mno-tls-direct-seg-refs flag available around ? (to avoid
> > performance drop on top of a NPTL based Dom0). Unfortunatelly we have
> > around a closed source app that breaks if i disable NPTL...
>
> I would be willing to test if you can get a hold of them. Too busy to
> rebuild myself (and haven't used rpms in a while).
>
> As a side note, I used the great images at http://jailtime.org to
> jumpstart a centos 4.1 and zimbra install, but had all kinds of problems
> until I re-enabled /lib/tls. I would love to see if this would help and
> get rid of all the warning messages from xen.
>
Always nice when someone beats you to a todo list item :-)
With the jailtime images what do you mean by renabling tls?
I have been using them with no issues( that I am aware of yet ) and the
tls libs are moved in my setup.
Regards,
Ted
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