On Fri, Feb 21, 2020 at 10:18 AM Stephen Kitt <steve@xxxxxxx> wrote: > > Based on the implementation in kernel/bpf/syscall.c, > kernel/bpf/trampoline.c, include/linux/filter.h, and the documentation > in bpftool-prog.rst. > > Signed-off-by: Stephen Kitt <steve@xxxxxxx> > --- > Documentation/admin-guide/sysctl/kernel.rst | 24 +++++++++++++++++++++ > 1 file changed, 24 insertions(+) > > diff --git a/Documentation/admin-guide/sysctl/kernel.rst b/Documentation/admin-guide/sysctl/kernel.rst > index 1c48ab4bfe30..89c70ea7de7c 100644 > --- a/Documentation/admin-guide/sysctl/kernel.rst > +++ b/Documentation/admin-guide/sysctl/kernel.rst > @@ -102,6 +102,20 @@ See the ``type_of_loader`` and ``ext_loader_ver`` fields in > :doc:`/x86/boot` for additional information. > > > +bpf_stats_enabled > +================= > + > +Controls whether the kernel should collect statistics on BPF programs > +(total time spent running, number of times run...). Enabling > +statistics causes a slight reduction in performance on each program > +run. The statistics can be seen using ``bpftool``. > + > += =================================== > +0 Don't collect statistics (default). > +1 Collect statistics. > += =================================== > + > + > cap_last_cap > ============ > > @@ -1152,6 +1166,16 @@ NMI switch that most IA32 servers have fires unknown NMI up, for > example. If a system hangs up, try pressing the NMI switch. > > > +unprivileged_bpf_disabled > +========================= > + > +Writing 1 to this entry will disabled unprivileged calls to ``bpf()``; 'will disable' ? It doesn't apply to bpf-next with: error: sha1 information is lacking or useless (Documentation/admin-guide/sysctl/kernel.rst). error: could not build fake ancestor Patch failed at 0001 docs: sysctl/kernel: Document BPF entries
