Re: [PATCH] bpf.2: update JIT support list for Linux 4.18

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On 2018-08-09 at 15:50:41 +0200, Michael Kerrisk (man-pages) <mtk.manpages@xxxxxxxxx> wrote:
> Hello Tobias,
> 
> On 8 August 2018 at 12:06, Tobias Klauser <tklauser@xxxxxxxxxx> wrote:
> > JIT support for x86-32 was during the Linux 4.18 release cycle. Also
> > correct the entry for MIPS (only MIPS64 is supported) and the source for
> > the list.
> 
> Thanks for this. I'm fine with it all, except changing the source.
> Your idea is to take whatever is said in the Doc file as the source,
> but that relies on that file being correctly up to date. I prefer to
> keep the documented source as is. (It may not be perfect, but it does
> give some independent verification of the actual state of the various
> architectures.)

Right, I wasn't considering this and I completely agree.

> Patch applied, but tweaked as I note above, to maintain mention of my
> source, and add mention of your source..

Thanks for fixing it. One very minor thing I noticed in your fix is that
you reverted the Linux version on which the information is based from
4.18-rc (which was true for my patch) to 4.16-rc (which was the version
before my patch).

Thanks
Tobias

> 
> Thanks,
> 
> Michael
> 
> > Signed-off-by: Tobias Klauser <tklauser@xxxxxxxxxx>
> > ---
> >  man2/bpf.2 | 7 +++++--
> >  1 file changed, 5 insertions(+), 2 deletions(-)
> >
> > diff --git a/man2/bpf.2 b/man2/bpf.2
> > index c712dce4150e..cbc131df2a83 100644
> > --- a/man2/bpf.2
> > +++ b/man2/bpf.2
> > @@ -1181,7 +1181,8 @@ is initialized to 1 and is immutable.
> >  one of the Spectre attacks against the BPF interpreter.)
> >  .PP
> >  The JIT compiler for eBPF is currently
> > -.\" last reviewed in Linux 4.16-rc by grepping for BPF_ALU64
> > +.\" last reviewed in Linux 4.18-rc by checking the documentation for
> > +.\" bpf_jit_enable in Documentation/sysctl/net.txt
> >  available for the following architectures:
> >  .IP * 3
> >  x86-64 (since Linux 3.18);
> > @@ -1195,9 +1196,11 @@ PowerPC 64 (since Linux 4.8);
> >  .IP *
> >  SPARC 64 (since Linux 4.12);
> >  .IP *
> > -MIPS (since Linux 4.13);
> > +MIPS 64 (since Linux 4.13);
> >  .IP *
> >  ARM32 (since Linux 4.14).
> > +.IP *
> > +x86-32 (since Linux 4.18).
> >  .PD
> >  .SH SEE ALSO
> >  .BR seccomp (2),
> > --
> > 2.18.0.130.g98da2f6b3e4a
> >
> >
> 
> 
> 
> --
> Michael Kerrisk
> Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
> Linux/UNIX System Programming Training: http://man7.org/training/
> 
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