Re: [PATCH] powerpc: tracing: don't trace hcalls on offline CPUs

From	Denis Kirjanov <kda@linux-powerpc.org>
Newsgroups	linux.kernel
Subject	Re: [PATCH] powerpc: tracing: don't trace hcalls on offline CPUs
Date	2015-11-23 10:40 +0100
Message-ID	<qxVLk-8n9-19@gated-at.bofh.it> (permalink)
References	<qp0TU-4iv-15@gated-at.bofh.it> <qqGHq-1jJ-41@gated-at.bofh.it> <qqJlV-2OU-25@gated-at.bofh.it> <qwSZd-79N-35@gated-at.bofh.it> <qxMoG-2bB-23@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On 11/23/15, Michael Ellerman <mpe@ellerman.id.au> wrote:
> On Fri, 2015-11-20 at 15:22 +0300, Denis Kirjanov wrote:
>> On 11/3/15, Denis Kirjanov <kda@linux-powerpc.org> wrote:
>> > On 11/3/15, Michael Ellerman <mpe@ellerman.id.au> wrote:
>> > > On Thu, 2015-10-29 at 22:10 +0300, Denis Kirjanov wrote:
>> > > > ./drmgr -c cpu -a -r gives the following warning:
>> > > >
>> > > > [ 2327.035563] RCU used illegally from offline CPU!
>> > > >
>> > > > Make the hypervisor tracepoints conditional by introducing
>> > > > TRACE_EVENT_FN_COND similar to TRACE_EVENT_FN
>> > >
>> > > We've fixed other cases like this with RCU_NONIDLE(), but I assume
>> > > that
>> > > doesn't work here because we're actually offline?
>> >
>> > Yes, in this case we're moving the complete core offline through
>> > dlpar...
>> >
>>
>> Hi Michael,
>> Could you pick this patch?
>
> It's mostly a tracing patch, so I'd need an ACK from Steve at least.
>
> It would probably be best if you split it into a "tracing: .. " patch which
> adds the new macros and then a powerpc patch which uses them.

Ok, sounds reasonable.

Thanks!
>
> cheers
>
>
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Re: [PATCH] powerpc: tracing: don't trace hcalls on offline CPUs Denis Kirjanov <kda@linux-powerpc.org> - 2015-11-20 13:30 +0100
  Re: [PATCH] powerpc: tracing: don't trace hcalls on offline CPUs Michael Ellerman <mpe@ellerman.id.au> - 2015-11-23 00:40 +0100
    Re: [PATCH] powerpc: tracing: don't trace hcalls on offline CPUs Steven Rostedt <rostedt@goodmis.org> - 2015-11-23 02:00 +0100
    Re: [PATCH] powerpc: tracing: don't trace hcalls on offline CPUs Denis Kirjanov <kda@linux-powerpc.org> - 2015-11-23 10:40 +0100

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