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Now it can run the BPF filtering test with normal user if the BPF objects are pinned by 'sudo perf record --setup-filter pin'. Let's update the test case to verify the behavior. It'll skip the test if the filter check is failed from a normal user, but it shows a message how to set up the filters. First, run the test as a normal user and it fails. $ perf test -vv filtering 95: perf record sample filtering (by BPF) tests: --- start --- test child forked, pid 425677 Checking BPF-filter privilege try 'sudo perf record --setup-filter pin' first. <<<--- here bpf-filter test [Skipped permission] ---- end(-2) ---- 95: perf record sample filtering (by BPF) tests : Skip According to the message, run the perf record command to pin the BPF objects. $ sudo perf record --setup-filter pin And re-run the test as a normal user. $ perf test -vv filtering 95: perf record sample filtering (by BPF) tests: --- start --- test child forked, pid 424486 Checking BPF-filter privilege Basic bpf-filter test Basic bpf-filter test [Success] Failing bpf-filter test Error: task-clock event does not have PERF_SAMPLE_CPU Failing bpf-filter test [Success] Group bpf-filter test Error: task-clock event does not have PERF_SAMPLE_CPU Error: task-clock event does not have PERF_SAMPLE_CODE_PAGE_SIZE Group bpf-filter test [Success] ---- end(0) ---- 95: perf record sample filtering (by BPF) tests : Ok Signed-off-by: Namhyung Kim <namhyung@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Ian Rogers <irogers@google.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: KP Singh <kpsingh@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Song Liu <song@kernel.org> Cc: Stephane Eranian <eranian@google.com> Cc: bpf@vger.kernel.org Link: https://lore.kernel.org/r/20240703223035.2024586-9-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.