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

[Ben Hutchings]

On Sun, 2015-05-24 at 14:09 +0300, Niko Tyni wrote:
> 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.

I can't reproduce this, but wonder if it's related to #784960?

Ben.

-- 
Ben Hutchings
Experience is what causes a person to make new mistakes instead of old ones.
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