Re: [tip: perf/core] uprobes: switch to RCU Tasks Trace flavor for better performance

Ingo Molnar <mingo@xxxxxxxxxx> · Tue, 10 Sep 2024 12:37:04 +0200

* Andrii Nakryiko <andrii.nakryiko@xxxxxxxxx> wrote:

> On Thu, Sep 5, 2024 at 8:03 AM tip-bot2 for Andrii Nakryiko
> <tip-bot2@xxxxxxxxxxxxx> wrote:
> >
> > The following commit has been merged into the perf/core branch of tip:
> >
> > Commit-ID:     c4d4569c41f9cda745cfd1d8089ea3d3526bafe5
> > Gitweb:        https://git.kernel.org/tip/c4d4569c41f9cda745cfd1d8089ea3d3526bafe5
> > Author:        Andrii Nakryiko <andrii@xxxxxxxxxx>
> > AuthorDate:    Tue, 03 Sep 2024 10:46:03 -07:00
> > Committer:     Peter Zijlstra <peterz@xxxxxxxxxxxxx>
> > CommitterDate: Thu, 05 Sep 2024 16:56:15 +02:00
> >
> 
> Hm... This commit landed in perf/core, but is gone now (the rest of
> patches is still there). Any idea what happened?

Yeah, I'm getting this build failure:

     kernel/events/uprobes.c:1158:9: error: implicit declaration of function ‘synchronize_rcu_tasks_trace’; did you mean ‘synchronize_rcu_tasks’? [-Werror=implicit-function-declaration]

on x86-64 defconfig, when applied to today's perf/core.

Thanks,

	Ingo