| Date | Tue, 11 Mar 2014 14:35:36 +0000 | From | Will Deacon <> | Subject | Re: [PATCH v5 0/7] arm64: Add ftrace support |
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Hi Akashi,
On Fri, Feb 28, 2014 at 05:18:37AM +0000, AKASHI Takahiro wrote: > This patchset implements a function tracer on arm64. > There was another implementation from Cavium network, but both of us agreed > to use my patchset as future base. He is supposed to review this code, too. > > The only issue that I had some concern on was "fault protection" code > in prepare_ftrace_return(). With discussions with Steven and Tim (as author > of arm ftrace), I removed that code since I'm not quite sure about possibility > of "fault" occurrences in this function. > > The code is tested on ARMv8 Fast Model with the following tracers & events: > function tracer with dynamic ftrace > function graph tracer with dynamic ftrace > syscall tracepoint > irqsoff & preemptirqsoff (which use CALLER_ADDRx) > and also verified with in-kernel tests, FTRACE_SELFTEST, FTRACE_STARTUP_TEST > and EVENT_TRACE_TEST_SYSCALLS. > > Prerequisites are: > * "arm64: Add regs_return_value() in syscall.h" > * "arm64: make a single hook to syscall_trace() for all syscall features" patch
It looks like there might be some more dependencies that that. Do you have a branch anywhere containing this series, along with all the dependencies so I can have a play?
Cheers,
Will
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