Re: [PATCH bpf-next v2] libbpf: Load btf_vmlinux only once per object.

[Alexei Starovoitov]

On Fri, Jan 17, 2020 at 1:55 PM Andrii Nakryiko
<andrii.nakryiko@xxxxxxxxx> wrote:
>
> On Fri, Jan 17, 2020 at 1:28 PM KP Singh <kpsingh@xxxxxxxxxxxx> wrote:
> >
> > From: KP Singh <kpsingh@xxxxxxxxxx>
> >
> > As more programs (TRACING, STRUCT_OPS, and upcoming LSM) use vmlinux
> > BTF information, loading the BTF vmlinux information for every program
> > in an object is sub-optimal. The fix was originally proposed in:
> >
> >    https://lore.kernel.org/bpf/CAEf4BzZodr3LKJuM7QwD38BiEH02Cc1UbtnGpVkCJ00Mf+V_Qg@xxxxxxxxxxxxxx/
> >
> > The btf_vmlinux is populated in the object if any of the programs in
> > the object requires it just before the programs are loaded and freed
> > after the programs finish loading.
> >
> > Reported-by: Andrii Nakryiko <andrii.nakryiko@xxxxxxxxx>
> > Reviewed-by: Brendan Jackman <jackmanb@xxxxxxxxxxxx>
> > Signed-off-by: KP Singh <kpsingh@xxxxxxxxxx>
> > ---
>
> Looks great!
>
> Acked-by: Andrii Nakryiko <andriin@xxxxxx>

Applied. Thanks