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Re: [PATCH] s390:ftrace: add save_stack_trace_regs()

From Heiko Carstens <heiko.carstens@de.ibm.com>
Newsgroups linux.kernel
Subject Re: [PATCH] s390:ftrace: add save_stack_trace_regs()
Date 2016-01-29 15:50 +0100
Message-ID <qWix5-4ym-29@gated-at.bofh.it> (permalink)
References <qW9N8-6pA-9@gated-at.bofh.it> <qWd4m-cs-11@gated-at.bofh.it> <qWgOD-3ad-23@gated-at.bofh.it> <qWhKG-3Ue-13@gated-at.bofh.it>
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On Fri, Jan 29, 2016 at 08:59:36AM -0500, Steven Rostedt wrote:
> On Fri, 29 Jan 2016 13:57:49 +0100
> Heiko Carstens <heiko.carstens@de.ibm.com> wrote:
> 
> > Surpringly it wasn't one of my own patches which broke the stack tracer on
> > s390, but one from Steven:
> > 
> > 72ac426a5bb0 ("tracing: Clean up stack tracing and fix fentry updates")
> > 
> > Now I only need to figure out why :)
> 
> Try this one?
> 
>   7717c6be699975f6733d278b13b7c4295d73caf6
>   tracing: Fix stacktrace skip depth in trace_buffer_unlock_commit_regs()
> 
> Or at the very least, merge with Linus's latest and see if something
> else doesn't fix it.

No, that doesn't fix it (current Linus' master):

# uname -a
Linux p2345007 4.5.0-rc1-00032-g26cd83670f2f #26 SMP Fri Jan 29 15:39:47 CET 2016 s390x s390x s390x GNU/Linux

# cat stack_max_size 
4496

# cat stack_trace
        Depth    Size   Location    (0 entries)
        -----    ----   --------

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Thread

[PATCH] s390:ftrace: add save_stack_trace_regs() Pratyush Anand <panand@redhat.com> - 2016-01-29 06:30 +0100
  Re: [PATCH] s390:ftrace: add save_stack_trace_regs() Heiko Carstens <heiko.carstens@de.ibm.com> - 2016-01-29 10:00 +0100
    Re: [PATCH] s390:ftrace: add save_stack_trace_regs() Heiko Carstens <heiko.carstens@de.ibm.com> - 2016-01-29 14:00 +0100
      Re: [PATCH] s390:ftrace: add save_stack_trace_regs() Steven Rostedt <rostedt@goodmis.org> - 2016-01-29 15:00 +0100
        Re: [PATCH] s390:ftrace: add save_stack_trace_regs() Heiko Carstens <heiko.carstens@de.ibm.com> - 2016-01-29 15:50 +0100
          Re: [PATCH] s390:ftrace: add save_stack_trace_regs() Steven Rostedt <rostedt@goodmis.org> - 2016-01-29 16:30 +0100
            Re: [PATCH] s390:ftrace: add save_stack_trace_regs() Heiko Carstens <heiko.carstens@de.ibm.com> - 2016-01-29 17:50 +0100
              Re: [PATCH] s390:ftrace: add save_stack_trace_regs() Steven Rostedt <rostedt@goodmis.org> - 2016-01-29 18:00 +0100
                Re: [PATCH] s390:ftrace: add save_stack_trace_regs() Heiko Carstens <heiko.carstens@de.ibm.com> - 2016-01-29 18:20 +0100
  Re: [PATCH] s390:ftrace: add save_stack_trace_regs() Heiko Carstens <heiko.carstens@de.ibm.com> - 2016-02-01 10:10 +0100

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