Bug#785557: perl: FTBFS on i386 and amd64: itimer problems on buildds?

[Niko Tyni]

On Sun, May 24, 2015 at 02:55:00PM +0800, Paul Wise wrote:
> On Sat, 2015-05-23 at 19:10 +0200, Dominic Hargreaves wrote:
> 
> > This is rather strange; any ideas from DSA?
> 
> The underlying hosts do not have the same issue.
> 
> All of the guests use the same virtual CPU version/flags.
> 
> All of the guests use the same Linux kernel version.

Thanks for the update.

> I guess diving into the Linux implementation of times(2) for clues would
> be the next step for figuring out what the issue is here.

I'm taking the kernel maintainers in the loop. The status here is that
times(2) seems to be misbehaving on some i386 and amd64 debian.org virtual
hosts running jessie (under ganeti/qemu, with jessie on the underlying
hosts too). These hosts include at least barriere and x86-grnet-01.

The misbehaviour is that user time stays at zero all the time, as seen
for example with 'time yes'. This is making perl fail to build from
source due to test failures, and I'd expect it to affect other things too.

Any help is appreciated.
-- 
Niko Tyni   ntyni at debian.org