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Date: Mon, 30 Jan 2023 14:26:06 -0500
From: "Michael S. Tsirkin" <mst@...hat.com>
To: Ross Zwisler <zwisler@...omium.org>
Cc: linux-kernel@...r.kernel.org, Ross Zwisler <zwisler@...gle.com>,
"Tobin C. Harding" <me@...in.cc>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Alexei Starovoitov <ast@...nel.org>,
Andrew Morton <akpm@...ux-foundation.org>,
Andrii Nakryiko <andrii@...nel.org>,
Arnaldo Carvalho de Melo <acme@...nel.org>,
Daniel Borkmann <daniel@...earbox.net>,
Hao Luo <haoluo@...gle.com>, Huang Rui <ray.huang@....com>,
Ingo Molnar <mingo@...hat.com>, Jason Gunthorpe <jgg@...pe.ca>,
Jason Wang <jasowang@...hat.com>, Jiri Olsa <jolsa@...nel.org>,
John Fastabend <john.fastabend@...il.com>,
KP Singh <kpsingh@...nel.org>,
Leon Romanovsky <leon@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Martin KaFai Lau <martin.lau@...ux.dev>,
Masami Hiramatsu <mhiramat@...nel.org>,
Mykola Lysenko <mykolal@...com>,
Namhyung Kim <namhyung@...nel.org>,
Paolo Bonzini <pbonzini@...hat.com>,
Peter Zijlstra <peterz@...radead.org>,
Shuah Khan <shuah@...nel.org>, Song Liu <song@...nel.org>,
Stanislav Fomichev <sdf@...gle.com>,
Steven Rostedt <rostedt@...dmis.org>,
Todd E Brandt <todd.e.brandt@...ux.intel.com>,
Tycho Andersen <tycho@...ho.pizza>, Yonghong Song <yhs@...com>,
bpf@...r.kernel.org, kvm@...r.kernel.org,
linux-hardening@...r.kernel.org, linux-kselftest@...r.kernel.org,
linux-mm@...ck.org, linux-perf-users@...r.kernel.org,
linux-pm@...r.kernel.org, linux-rdma@...r.kernel.org,
virtualization@...ts.linux-foundation.org,
linux-trace-kernel@...r.kernel.org
Subject: Re: [PATCH 0/9] use canonical ftrace path whenever possible
On Mon, Jan 30, 2023 at 11:19:06AM -0700, Ross Zwisler wrote:
> The canonical location for the tracefs filesystem is at /sys/kernel/tracing.
Acked-by: Michael S. Tsirkin <mst@...hat.com>
> But, from Documentation/trace/ftrace.rst:
>
> Before 4.1, all ftrace tracing control files were within the debugfs
> file system, which is typically located at /sys/kernel/debug/tracing.
> For backward compatibility, when mounting the debugfs file system,
> the tracefs file system will be automatically mounted at:
>
> /sys/kernel/debug/tracing
>
> There are many places where this older debugfs path is still used in
> code comments, selftests, examples and tools, so let's update them to
> avoid confusion.
>
> I've broken up the series as best I could by maintainer or directory,
> and I've only sent people the patches that I think they care about to
> avoid spamming everyone.
>
> Ross Zwisler (9):
> tracing: always use canonical ftrace path
> bpf: use canonical ftrace path
> selftests/bpf: use canonical ftrace path
> perf docs: use canonical ftrace path
> tools/power: use canonical ftrace path
> selftests: use canonical ftrace path
> tools/virtio: use canonical ftrace path
> leaking_addresses: also skip canonical ftrace path
> tools/kvm_stat: use canonical ftrace path
>
> include/linux/kernel.h | 2 +-
> include/linux/tracepoint.h | 4 ++--
> include/uapi/linux/bpf.h | 8 ++++----
> kernel/trace/Kconfig | 20 +++++++++----------
> kernel/trace/kprobe_event_gen_test.c | 2 +-
> kernel/trace/ring_buffer.c | 2 +-
> kernel/trace/synth_event_gen_test.c | 2 +-
> kernel/trace/trace.c | 2 +-
> samples/bpf/cpustat_kern.c | 4 ++--
> samples/bpf/hbm.c | 4 ++--
> samples/bpf/ibumad_kern.c | 4 ++--
> samples/bpf/lwt_len_hist.sh | 2 +-
> samples/bpf/offwaketime_kern.c | 2 +-
> samples/bpf/task_fd_query_user.c | 4 ++--
> samples/bpf/test_lwt_bpf.sh | 2 +-
> samples/bpf/test_overhead_tp_kern.c | 4 ++--
> samples/user_events/example.c | 4 ++--
> scripts/leaking_addresses.pl | 1 +
> scripts/tracing/draw_functrace.py | 6 +++---
> scripts/tracing/ftrace-bisect.sh | 4 ++--
> tools/include/uapi/linux/bpf.h | 8 ++++----
> tools/kvm/kvm_stat/kvm_stat | 2 +-
> tools/lib/api/fs/tracing_path.c | 4 ++--
> tools/lib/traceevent/event-parse.c | 8 ++++----
> tools/perf/Documentation/perf-list.txt | 2 +-
> tools/perf/Documentation/perf-script-perl.txt | 2 +-
> .../perf/Documentation/perf-script-python.txt | 4 ++--
> tools/power/pm-graph/sleepgraph.py | 4 ++--
> .../x86/amd_pstate_tracer/amd_pstate_trace.py | 4 ++--
> .../intel_pstate_tracer.py | 10 +++++-----
> .../selftests/bpf/get_cgroup_id_user.c | 2 +-
> .../bpf/prog_tests/kprobe_multi_test.c | 2 +-
> .../bpf/prog_tests/task_fd_query_tp.c | 2 +-
> .../bpf/prog_tests/tp_attach_query.c | 2 +-
> .../selftests/bpf/prog_tests/trace_printk.c | 2 +-
> .../selftests/bpf/prog_tests/trace_vprintk.c | 2 +-
> .../selftests/bpf/progs/test_stacktrace_map.c | 2 +-
> .../selftests/bpf/progs/test_tracepoint.c | 2 +-
> tools/testing/selftests/bpf/test_ftrace.sh | 2 +-
> tools/testing/selftests/bpf/test_tunnel.sh | 8 ++++----
> tools/testing/selftests/bpf/trace_helpers.c | 4 ++--
> .../testing/selftests/user_events/dyn_test.c | 2 +-
> .../selftests/user_events/ftrace_test.c | 10 +++++-----
> .../testing/selftests/user_events/perf_test.c | 8 ++++----
> tools/testing/selftests/vm/protection_keys.c | 4 ++--
> tools/tracing/latency/latency-collector.c | 2 +-
> tools/virtio/virtio-trace/README | 2 +-
> tools/virtio/virtio-trace/trace-agent.c | 2 +-
> 48 files changed, 96 insertions(+), 95 deletions(-)
>
> --
> 2.39.1.456.gfc5497dd1b-goog
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