[Y2038] Question about porting y2038-tests to glibc

[Lukasz Majewski]

Hi Florian,

> * Lukasz Majewski:
> 
> > Or maybe somebody has better idea how to solve this issue?  
> 
> Have time namespaces landed in the upstream kernel?

Yes, they are supported since 5.6 [1].

However, according to [2] only CLOCK_MONOTONIC and CLOCK_BOOTIME are
supported.

For CLOCK_REALTIME ("NOTES" section):

"Note that time namespaces do not virtualize the CLOCK_REALTIME clock.
Virtualization of this clock was avoided for reasons of complexity and
overhead within the kernel."


As far as I can see - glibc uses syscalls referring to
CLOCK_REALTIME not adjusted by time namespaces. This would cause errors.


Links:
[1] -
https://www.phoronix.com/scan.php?page=news_item&px=Linux-Time-Namespace-Coming

[2] - https://man7.org/linux/man-pages/man7/time_namespaces.7.html

> 
> Thanks,
> Florian




Best regards,

Lukasz Majewski

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