On Wed 08 May 2013 15:51:30 Michael Tokarev escribió:
> Control: tag -1 + moreinfo
> 
> 08.05.2013 17:30, Lisandro Damián Nicanor Pérez Meyer wrote:
> > Package: qemu-user-static
> > Version: 1.1.2+dfsg-6a
> > Severity: important
> > 
> > Hi! I'm using qemu-mips-static to build some packages in a chroot.
> > Up to late last year I could do this without problems, using
> > a 64 bits wheezy host and a mips chroot.
> > 
> > After updating the chroot to stable wheezy, I've found that running
> > Doxygen with dot graphs enabled will make qemu-mips-static hang the CPU.
> 
> It's interesting that you mention _chroot_ upgrade as something that
> caused this issue to appear, not the _host_ upgrade.  So as far as
> I understand, it is a change in the "guest" broke existing qemu, --
> usually it is exactly the opposite, qemu upgrade breaks stuff...

Actually the development was done in parallel with two "hosts": a real 
hardware sid install and under a virtualbox VM running Wheezy.

Both hosts were up to date in december and now.

[snip]
 
> and this is the very important point.
> 
> This is qemu-user, it does not do any fancy stuff with the host kernel
> (like, say, qemu-system-x86_64 -enable-kvm do) - it is regular userspace
> process doing the same stuff as any other regular app would do.  If that
> causes the host kernel to not be able to release the process with kill -9,
> that's a big kernel issue.
> 
> Please at least do a kernel stack dump (echo t > /proc/sysrq-trigger),
> find the process in question and post it here.  It may be that this bug
> report needs to be reassigned to kernel instead...

Excellent, will do that :-)

Thanks Michael!

-- 
mathematician, n.:
        Some one who believes imaginary things appear right before your i's.

Lisandro Damián Nicanor Pérez Meyer
http://perezmeyer.com.ar/
http://perezmeyer.blogspot.com/

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