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SubjectRe: [PATCH] bpf: Update sysctl documentation to list all supported architectures
Hi Michael,

On 08/16/2017 07:15 AM, Michael Ellerman wrote:
> The sysctl documentation states that the JIT is only available on
> x86_64, which is no longer correct.
>
> Update the list to include all architectures that enable HAVE_CBPF_JIT
> or HAVE_EBPF_JIT under some configuration.
>
> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

Thanks for the patch!

> Documentation/sysctl/net.txt | 5 +++--
> 1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/Documentation/sysctl/net.txt b/Documentation/sysctl/net.txt
> index 14db18c970b1..f68356024d09 100644
> --- a/Documentation/sysctl/net.txt
> +++ b/Documentation/sysctl/net.txt
> @@ -36,8 +36,9 @@ bpf_jit_enable
> --------------
>
> This enables Berkeley Packet Filter Just in Time compiler.
> -Currently supported on x86_64 architecture, bpf_jit provides a framework
> -to speed packet filtering, the one used by tcpdump/libpcap for example.
> +Currently supported on arm, arm64, mips, powerpc, s390, sparc and x86_64
> +architectures, bpf_jit provides a framework to speed packet filtering, the one
> +used by tcpdump/libpcap for example.

Good point, could we actually make that as a bullet list and
differentiate between cBPF and eBPF JITs, so that a user doesn't
need to run git grep HAVE_{E,C}BPF_JIT to figure it out what the
switch enables on the arch used? That would be great.

So for eBPF JITs, we have covered:

* x86_64
* arm64
* ppc64
* sparc64
* mips64

For old cBPF, there is:

* arm
* mips
* ppc
* sparc

Thanks,
Daniel

> Values :
> 0 - disable the JIT (default value)
> 1 - enable the JIT
>

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