Control: reopen -1
Control: severity -1 normal
On Fri, 2016-03-11 at 01:12 +0100, Harry Junior wrote:
> On Thu, 10 Mar 2016 17:34:54 +0000 Ben Hutchings wrote:
> >
> > On Thu, 2016-03-10 at 17:32 +0100, Harry Junior wrote:
> > >
> > > Package: linux-image-4.4.0-1-amd64
> > > Version: 4.4.4-1
> > > Severity: critical
> > > Justification: renders system unusable
> > >
> > >
> > > When I run the following commands, the system freezes:
> > >
> > > # echo 0 | tee /sys/devices/system/cpu/cpu*/online && echo 1 | sudo
> > > tee /sys/devices/system/cpu/cpu*/online
> > >
> > > The system freezes randomly when the CPUs are being onlined or
> > > offlined. The system is installed on a VMware virtual machine with 4
> > > processors. Here's a stacktrace of the infinite loop:
> > [...]
> >
> > You just asked to offline all CPUs, making the system unusable. Â I
> > don't see any bug here.
> I'm sorry to disagree, but the CPU0 can't be offlined and remains online:
[...]
Depending on the configuration, it may be possible to offline CPU0.
However, I have been informed that the kernel still prevents offlining
the last CPU - or at least it is supposed to.
So I'm reopening this, but correcting the severity. ("renders system
unusable" does *not* mean the system hangs or crashes, it means the
system becomes unbootable or otherwise persistently broken.)
Ben.
--
Ben Hutchings
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