Messages in this thread | | | Subject | Re: [PATCH 2/2] powerpc: tracing: don't trace hcalls on offline CPUs | From | Michael Ellerman <> | Date | Thu, 26 Nov 2015 20:26:40 +1100 |
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On Thu, 2015-11-26 at 11:15 +0300, Denis Kirjanov wrote: > On 11/26/15, Michael Ellerman <mpe@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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