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

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On Wed, Feb 26, 2020 at 01:14:43PM -0800, Song Liu wrote:
> On Wed, Feb 26, 2020 at 5:04 AM Jiri Olsa <jolsa@xxxxxxxxxx> wrote:
> >
> > 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@xxxxxxxxxx>
> 
> 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




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