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Merge tag 'perf-core-for-mingo-5.8-20200420' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core

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Pull perf/core fixes and improvements from Arnaldo Carvalho de Melo:

kernel + tools/perf:

  Alexey Budankov:

  - Introduce CAP_PERFMON to kernel and user space.

callchains:

  Adrian Hunter:

  - Allow using Intel PT to synthesize callchains for regular events.

  Kan Liang:

  - Stitch LBR records from multiple samples to get deeper backtraces,
    there are caveats, see the csets for details.

perf script:

  Andreas Gerstmayr:

  - Add flamegraph.py script

BPF:

  Jiri Olsa:

  - Synthesize bpf_trampoline/dispatcher ksymbol events.

perf stat:

  Arnaldo Carvalho de Melo:

  - Honour --timeout for forked workloads.

  Stephane Eranian:

  - Force error in fallback on :k events, to avoid counting nothing when
    the user asks for kernel events but is not allowed to.

perf bench:

  Ian Rogers:

  - Add event synthesis benchmark.

tools api fs:

  Stephane Eranian:

 - Make xxx__mountpoint() more scalable

libtraceevent:

  He Zhe:

  - Handle return value of asprintf.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Ingo Molnar
2020-04-22 14:08:28 +02:00
parent 18bf34080c 12e89e65f4
commit 87cfeb1920
85 changed files with 1855 additions and 517 deletions
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16
Documentation/admin-guide/sysctl/kernel.rst
View File

@@ -721,7 +721,13 @@ perf_event_paranoid
===================
Controls use of the performance events system by unprivileged
users (without CAP_SYS_ADMIN). The default value is 2.
users (without CAP_PERFMON). The default value is 2.
For backward compatibility reasons access to system performance
monitoring and observability remains open for CAP_SYS_ADMIN
privileged processes but CAP_SYS_ADMIN usage for secure system
performance monitoring and observability operations is discouraged
with respect to CAP_PERFMON use cases.
=== ==================================================================
-1 Allow use of (almost) all events by all users.
@@ -730,13 +736,13 @@ users (without CAP_SYS_ADMIN). The default value is 2.
``CAP_IPC_LOCK``.
>=0 Disallow ftrace function tracepoint by users without
``CAP_SYS_ADMIN``.
``CAP_PERFMON``.
Disallow raw tracepoint access by users without ``CAP_SYS_ADMIN``.
Disallow raw tracepoint access by users without ``CAP_PERFMON``.
>=1 Disallow CPU event access by users without ``CAP_SYS_ADMIN``.
>=1 Disallow CPU event access by users without ``CAP_PERFMON``.
>=2 Disallow kernel profiling by users without ``CAP_SYS_ADMIN``.
>=2 Disallow kernel profiling by users without ``CAP_PERFMON``.
=== ==================================================================