Hi,
Accordint to the discussion on patchset v1, it seems an extra
perf_trace_buf is reduntant, this patch removes the additional buffer
and stores bpf output into a temporary region at the ending of the
original perf_trace_buf. The temporary region will be moved back to
the proper offset of perf_trace_buf at the stage of
perf_trace_prepare_buf.
v1-v2:
- Remove additional perf_trace_buf. Use the end of perf_trace_buf as
a temporary region to store bpf data.
- Rename bpf_output_sample to bpf_output_data.
- New bpf API added to the end of the function list.
Thank you.
He Kuang (4):
bpf: Put perf_events check ahead of bpf prog
tracing/kprobe: Separate inc recursion count out of
perf_trace_buf_prepare
bpf: Introduce function for outputing data to perf event
tracing/kprobe: Combine bpf output and perf event output
include/linux/ftrace_event.h | 4 +++
include/linux/perf_event.h | 2 ++
include/uapi/linux/bpf.h | 3 ++
kernel/events/core.c | 6 ++++
kernel/events/internal.h | 17 ++++++----
kernel/trace/bpf_trace.c | 29 +++++++++++++++++
kernel/trace/trace_event_perf.c | 56 +++++++++++++++++++++++++++++---
kernel/trace/trace_kprobe.c | 72 ++++++++++++++++++++++++++++++++++-------
samples/bpf/bpf_helpers.h | 2 ++
9 files changed, 167 insertions(+), 24 deletions(-)
--
1.8.5.2
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