Hi Mathieu, May I know your comments for this patch set?
Thanks, Tingwei On Thu, Aug 13, 2020 at 09:45:46AM +0800, Tingwei Zhang wrote: > Ftrace has ability to export trace packets to other destination. > Currently, only function trace can be exported. This series extends the > support to event trace and trace_maker. STM is one possible destination to > export ftrace. Use separate channel for each CPU to avoid mixing up > packets > from different CPUs together. > > Change from v2: > Change flag definition to BIT(). (Steven) > Add comment in stm_ftrace_write() to clarify it's safe to use > smp_processor_id() here since preempt is disabled. (Steven) > > Change from v1: > All changes are suggested by Steven Rostedt. > User separate flag to control function trace, event trace and trace mark. > Allocate channels according to num_possible_cpu() dynamically. > Move ftrace_exports routines up so all ftrace can use them. > > Tingwei Zhang (6): > stm class: ftrace: change dependency to TRACING > tracing: add flag to control different traces > tracing: add trace_export support for event trace > tracing: add trace_export support for trace_marker > stm class: ftrace: enable supported trace export flag > stm class: ftrace: use different channel accroding to CPU > > drivers/hwtracing/stm/Kconfig | 2 +- > drivers/hwtracing/stm/ftrace.c | 7 +- > include/linux/trace.h | 7 + > kernel/trace/trace.c | 270 ++++++++++++++++++--------------- > 4 files changed, 159 insertions(+), 127 deletions(-) > > -- > The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, > a Linux Foundation Collaborative Project >
