[CentOS] NPTL degraded?

Thu Mar 29 00:52:41 UTC 2007
John Summerfield <debian at herakles.homelinux.org>

Lonny Selinger wrote:
>>Lonny Selinger wrote:
>>
>>>>Lonny Selinger wrote:
>>>>
>>>>>I'm not sure what has happened but for some reason my CentOS 4 system is
>>>>>showing me using default threads??
>>>>>
>>>>># getconf GNU_LIBPTHREAD_VERSION
>>>>>linuxthreads-0.10
>>>>>
>>>>># uname -rimpv
>>>>>2.6.9-42.0.10.EL #1 Tue Feb 27 09:24:42 EST 2007 i686 athlon i386
>>>>>
>>>>>I could have sworn it used to show:
>>>>>
>>>>>NPTL 2.3.4
>>>>
>>>>Mine do
>>>>
>>>>
>>>>>Like a couple other machines. Any ideas what might have changed this or
>>>>>how
>>>>>I
>>>>>get it back??? the devel package for NPTL is installed but from my
>>>>>understanding that has little to do with why getconf is showing this. I'm
>>>>>feeling new here :-)
>>>>
>>>>[summer at bilby ~]$ ssh cdm rpm -qif $(type -p getconf)
>>>>Name        : glibc-common                 Relocations: (not relocatable)
>>>>Version     : 2.3.4                             Vendor: CentOS
>>>>Release     : 2.25                          Build Date: Sat Aug 12
>>>>19:52:27 2006
>>>>Install Date: Tue Sep  5 01:47:21 2006      Build Host: build-i386
>>>>Group       : System Environment/Base       Source RPM:
>>>>glibc-2.3.4-2.25.src.rpm
>>>>Size        : 59306351                         License: LGPL
>>>>Signature   : DSA/SHA1, Sat Aug 12 22:08:33 2006, Key ID a53d0bab443e1821
>>>>Packager    : Johnny Hughes <johnny at centos.org>
>>>>Summary     : Common binaries and locale data for glibc
>>>>Description :
>>>>The glibc-common package includes common binaries for the GNU libc
>>>>libraries, as well as national language (locale) support.
>>>>[summer at bilby ~]$
>>>>
>>>>Cheers
>>>>John
>>>
>>>Thanks John ... at least you've confirmed I'm not crazy:
>>>
>>>Name        : glibc-common                 Relocations: (not relocatable)
>>>Version     : 2.3.4                             Vendor: CentOS
>>>Release     : 2.25                          Build Date: Sat 12 Aug 2006
>>>05:52:27 AM CST
>>>Install Date: Mon 05 Mar 2007 06:18:49 PM CST      Build Host: build-i386
>>>Group       : System Environment/Base       Source RPM:
>>>glibc-2.3.4-2.25.src.rpm
>>>Size        : 59306351                         License: LGPL
>>>Signature   : DSA/SHA1, Sat 12 Aug 2006 08:08:33 AM CST, Key ID
>>>a53d0bab443e1821
>>>Packager    : Johnny Hughes <johnny at centos.org>
>>>Summary     : Common binaries and locale data for glibc
>>>Description :
>>>The glibc-common package includes common binaries for the GNU libc
>>>libraries, as well as national language (locale) support.
>>>
>>>I still don't know why all of a sudden NPTL dissapeared  :-(   I'll keep
>>>banging my head and see what rattles loose
>>
>>rpm -V
>>
> 
> 
> Thanks again John. Just in case anyone else ever runs into this. I had
> installed an app that mentioned that /lib/tls needed to be moved for the app

xen is a candidate here.

> to run as is had a flaw in it. This was a quick install I found on a site
> somewhere ... eventually (last night) I read the official documentation which
> specified that the flaw was in the patch provided quite a while ago for 2.4
> kernels NOT the 2.6 branch.
> 
> In my case, /lib/tls was moved to /lib/tls.old and never paid attention to
> again ... until this problem. Running the RPM verify against glibc showed that
> there were horrific changes even once I had moved /lib/tls.old back to
> /lib/tls as I had upgraded glibc and other accompanying apps and packages
> while /lib/tls was gone.
> 
> As this machine is a kick toy right now it was pretty simple to reinstall
> (which I was aplnning anyway) but I'm assuming it _may_ have been possible to
> do a force install of the last upgrades I had done to try to correct the issue
> WITH /lib/tls in place.
> 
> Side note, are rollbacks supported/implemented at all in CentOS 4 (or upcoming
> 5) ?  I know there are snapshots implemented in the management and prvisioning
> modules for RHEL through rhn, just wondering if there's a similar machanism
> that can be enabled for CentOS. I'm assuming there is with yum I'm just
> weening off of up2date now ;P

I'm using up2date, and I'm getting replacement rpms created. I've not 
needed to use one, every, but it's a feature and choice I value.


> 
> Thanks again!!
> 
> --
> Lonny


-- 

Cheers
John

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