Messages in this thread | | | Date | Fri, 29 Jan 2016 13:57:49 +0100 | From | Heiko Carstens <> | Subject | Re: [PATCH] s390:ftrace: add save_stack_trace_regs() |
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On Fri, Jan 29, 2016 at 09:54:47AM +0100, Heiko Carstens wrote: > On Fri, Jan 29, 2016 at 10:50:28AM +0530, Pratyush Anand wrote: > > Implement save_stack_trace_regs, so that stacktrace of a kprobe events can > > be obtained. > > > > Without this we see following warning: > > "save_stack_trace_regs() not implemented yet." > > when we execute: > > echo stacktrace > /sys/kernel/debug/tracing/trace_options > > echo "p kfree" >> /sys/kernel/debug/tracing/kprobe_events > > echo 1 > /sys/kernel/debug/tracing/events/kprobes/enable > > > > Reported-by: Chunyu Hu <chuhu@redhat.com> > > Signed-off-by: Pratyush Anand <panand@redhat.com> > > --- > > Thanks. I just figured out that the ftrace stack tracer doesn't work at all > anymore on s390. I will apply your patch after I fixed that. ;)
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 :)
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