Re: [PATCH v4 tip/perf/core 0/4] uprobes,mm: speculative lockless VMA-to-uprobe lookup

Ingo Molnar
2024-11-20T16:03:24Z

* Peter Zijlstra <peterz@infradead.org> wrote:

> On Wed, Nov 20, 2024 at 07:40:15AM -0800, Andrii Nakryiko wrote:
> > Linus,
> >
> > I'm not sure what's going on here, this patch set seems to be in some
> > sort of "ignore list" on Peter's side with no indication on its
> > destiny.
>
> *sigh* it is not, but my inbox is like drinking from a firehose :/

And I've been considering that particular series WIP for two reasons:

1) Oleg was still unconvinced about patch 5/5 in the v2 discussion.
Upon re-reading it I think he might have come around and has agreed
to the current approach - but sending a v3 & not seeing Oleg object
would ascertain that.

2) There was a build failure reported against -v2 at:

https://lore.kernel.org/all/202410050745.2Nuvusy4-lkp@intel.com/t.mbox.gz

We cannot and will not merge patches with build failures.

Andrii did get some other uprobes scalability work merged in v6.13:

- Switch to RCU Tasks Trace flavor for better performance (Andrii Nakryiko)

- Massively increase uretprobe SMP scalability by SRCU-protecting
the uretprobe lifetime (Andrii Nakryiko)

So we've certainly not been ignoring his patches, to the contrary ...

Thanks,

Ingo