On Thu, 2015-11-26 at 11:15 +0300, Denis Kirjanov wrote:
> On 11/26/15, Michael Ellerman <m...@ellerman.id.au> wrote:
> > On Tue, 2015-11-24 at 21:23 +0300, Denis Kirjanov wrote:
> > I can't get this to hit.
> > 
> > I've got LOCKDEP=y, I've enabled the hcall tracepoints, and then I offline
> > a cpu via sysfs.

> I haven't tried it via sysfs. Could you share the command
> so I give a try to reproduce.

Either manually:

$ echo 0 > /sys/devices/system/cpuN/online

Or using:

$ ppc64_cpu --cores-on=1
and/or
$ ppc64_cpu --smt=1

Which uses sysfs.

cheers

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