On Mon, 2016-11-01 at 03:30:31 UTC, Michael Ellerman wrote: > On Fri, 2016-01-08 at 17:50 -0500, Steven Rostedt wrote: > > > Are you going to take this, or do you want me to? > > Sorry, yep I'll take it. > > I trimmed the change log a bit, final version below. > > powerpc: Implement save_stack_trace_regs() to enable kprobe stack tracing > > It has come to my attention that kprobe event stack tracing does not > work on powerpc. You can see with the following: > > # cd /sys/kernel/debug/tracing > # echo stacktrace > trace_options > # echo 'p kfree' > kprobe_events > # echo 1 > events/kprobes/enable > > Will print the following warning: > save_stack_trace_regs() not implemented yet. > > Although save_stack_trace() (which normal event stack traces use) is > implemented, save_stack_trace_regs() which kprobe events use is not. > This is a cheap attempt to implement that function. > > Note, This may have issues if a task tries to get a stack trace from > another task with its regs, because it just passes in "current" to > save_context_stack(). But this does solve the issue with stack tracing > kprobe events. > > Reported-by: Chunyu Hu <ch...@redhat.com> > Signed-off-by: Steven Rostedt <rost...@goodmis.org> > Signed-off-by: Michael Ellerman <m...@ellerman.id.au>
Applied to powerpc next, thanks. https://git.kernel.org/powerpc/c/35de3b1aa16842214e0cd7c603 cheers _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
