Re: uprobe support mix of ftrace and perf

Masami Hiramatsu
2018-11-26T08:16:40Z

Hi Oleg,

On Thu, 22 Nov 2018 15:32:10 +0100
Oleg Nesterov <oleg@redhat.com> wrote:

> Hi Masami,
>
> On 11/20, Masami Hiramatsu wrote:
> >
> > Hello Oleg,
> >
> > I have a question about the (revert) commit 48212542067a
> > ("tracing/uprobes: Revert "Support mix of ftrace and perf""). I found
> > this limitation still exists on uprobe events.
>
> Yes...
>
> > Would you have any plan or idea to fix this issue? I thought this revert
> > patch was a tentative one, and should be fixed afterwards.
>
> To be honest, I was going to fix this "soon" many years ago, but today I simply
> can't recall how this code actually works and what exactly we need to do to
> support ftrace/perf at the same time...
>
> I'll try to read this code later, but I can't promise anything :/

I understand, it may take a while... no need to promise :). I'll also look
into it.

Thank you,

>
> Oleg.
>

--
Masami Hiramatsu <mhiramat@kernel.org>