Re: [PATCH v2] perf symbol: remove Rust symbol workarounds

Arnaldo Carvalho de Melo
2026-01-07T13:38:44Z

On Wed, Jan 07, 2026 at 12:04:32AM -0800, Namhyung Kim wrote:
> On Mon, Jan 05, 2026 at 12:50:15PM -0300, Arnaldo Carvalho de Melo wrote:
> > On Mon, Jan 05, 2026 at 03:00:57PM +0000, Gary Guo wrote:
> > > Due to an off-by-one error introduced in commit 73bbb94466fd ("kallsyms:
> > > support "big" kernel symbols"), long symbols (which are currently only
> > > produced by Rust) can have their symbol type being wrongly parsed by
> > > kernel/kallsyms.c.

> > Looks sane, applied to perf-tools-next,

> I'm afraid there may be some outdated kernels which don't have the fix
> yet. Maybe make sense to wait some more time for them to disappear?

Right, I took it more as it seems to be just a blip in time, something
that came and went quickly and that most likely will not cause problems,
i.e. just a handful of extra symbols in the lookup data structures in
those particular kernels and a new 'perf test' tool with these reverts,
if run on those particular kernels would then fail for that particular
test case, for a known reason.

So with the above rationale you still feel strongly about having it
applied?

- Arnaldo