Re: [PATCH 04/18] bpf: Add name to struct bpf_ksym

On Wed, Feb 26, 2020 at 01:14:43PM -0800, Song Liu wrote:

On Wed, Feb 26, 2020 at 5:04 AM Jiri Olsa [off-list ref] wrote:

quoted

Adding name to 'struct bpf_ksym' object to carry the name
of the symbol for bpf_prog, bpf_trampoline, bpf_dispatcher.

The current benefit is that name is now generated only when
the symbol is added to the list, so we don't need to generate
it every time it's accessed.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>

The patch looks good. But I wonder whether we want pay the cost of
extra 128 bytes per bpf program. Maybe make it a pointer and only
generate the string when it is first used?

I thought 128 would not be that bad, also the code is quite
simple because of that.. if that's really a concern I could
make the changes, but that would probably mean changing the
design

jirka