[Pkg-xen-devel] About libc/tls [signed]

[Jeremy T. Bouse [c]]

    Just a thought, but we know that touching /etc/ld.so.hwnocap appears
to disable the tls support in libc; however, has anyone tried doing so
and then seeing if Xen detects whether tls is enabled or disabled? I
would agree if it simply means touching this file or ensuring this file
exists this would be a far simplier approach to the tls issue than
moving /lib/tls or trying to divert all the files contained within it.

    Regards,
    Jeremy

Ralph Passgang wrote:

>sorry, that was a stupid question. why should a file in /etc disappear just 
>because of a reboot.
>
>hmmm. so touching that file is more or less the same as moving the /lib/tls 
>directory. It's more elegant, because moving the directory is not a solution 
>for the case that libc6 is updated. on the other hand touching 
>the /etc/ld.so.hwnocap file would be a solution for the libc6 upgrading 
>problem.
>
>if we go this way, we should try to create the /etc/ld.so.hwnocap file as soon 
>as possible after the init process to not have services started in an 
>tls-enabled mode. We should also remove this file again in a very early 
>runnlevel if a non-xen kernel is running (again).
>
>Is that also a solution for the initrd/tls-problem? A initrd that has been 
>created on a tls-enabled system will cause xen to warn about tls. What about 
>the /etc/ld.so.hwnocap file in combination with the initrd-creation? Will a 
>initrd image warn about tls at boot time or not?
>
>--Ralph
>
>Am Mittwoch, 1. März 2006 18:50 schrieb Ralph Passgang:
>  
>
>>and after a reboot the system is tls-enabled again?
>>
>>is that debian specific or should that work on all systems? I am wondering
>>because I think this solution has never been reported to the xen lists
>>before...
>>
>>--Ralph
>>
>>Am Mittwoch, 1. März 2006 17:40 schrieb Julien Danjou:
>>    
>>
>>>Hello,
>>>
>>>I asked Aurelien Jarno from the Debian glibc team about our /lib/tls
>>>problem.
>>>It gave me a little help:
>>>
>>># ldd /bin/echo
>>>                libc.so.6 => /lib/tls/libc.so.6 (0x40021000)
>>># touch /etc/ld.so.hwnocap
>>># ldd /bin/echo
>>>                libc.so.6 => /lib/libc.so.6 (0x40021000)
>>>
>>>I think this could help us.
>>>      
>>>
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>>    
>>
>
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>
>  
>



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