linux-kernel - Re: [PATCH v2 0/3] uprobes: two common case speed ups

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Date: Wed, 20 Mar 2024 12:17:17 +0900
From: Masami Hiramatsu (Google) <mhiramat@...nel.org>
To: Andrii Nakryiko <andrii.nakryiko@...il.com>
Cc: Andrii Nakryiko <andrii@...nel.org>, linux-trace-kernel@...r.kernel.org,
 rostedt@...dmis.org, bpf@...r.kernel.org, mathieu.desnoyers@...icios.com,
 linux-kernel@...r.kernel.org, oleg@...hat.com, jolsa@...nel.org
Subject: Re: [PATCH v2 0/3] uprobes: two common case speed ups

On Tue, 19 Mar 2024 09:19:19 -0700
Andrii Nakryiko <andrii.nakryiko@...il.com> wrote:

> On Mon, Mar 18, 2024 at 9:21 PM Masami Hiramatsu <mhiramat@...nel.org> wrote:
> >
> > Hi,
> >
> > On Mon, 18 Mar 2024 11:17:25 -0700
> > Andrii Nakryiko <andrii@...nel.org> wrote:
> >
> > > This patch set implements two speed ups for uprobe/uretprobe runtime execution
> > > path for some common scenarios: BPF-only uprobes (patches #1 and #2) and
> > > system-wide (non-PID-specific) uprobes (patch #3). Please see individual
> > > patches for details.
> >
> > This series looks good to me. Let me pick it on probes/for-next.
> 
> Great, at least I guessed the Git repo right, if not the branch.
> Thanks for pulling it in! I assume some other uprobe-related follow up
> patches should be based on probes/for-next as well, right?

Yes, I'll pick those on linux-trace tree's probes/* branchs
(if there is an urgent patch, it will go through probes/fixes)

Thank you! 

> 
> >
> > Thanks!
> >
> > >
> > > v1->v2:
> > >   - rebased onto trace/core branch of tracing tree, hopefully I guessed right;
> > >   - simplified user_cpu_buffer usage further (Oleg Nesterov);
> > >   - simplified patch #3, just moved speculative check outside of lock (Oleg);
> > >   - added Reviewed-by from Jiri Olsa.
> > >
> > > Andrii Nakryiko (3):
> > >   uprobes: encapsulate preparation of uprobe args buffer
> > >   uprobes: prepare uprobe args buffer lazily
> > >   uprobes: add speculative lockless system-wide uprobe filter check
> > >
> > >  kernel/trace/trace_uprobe.c | 103 +++++++++++++++++++++---------------
> > >  1 file changed, 59 insertions(+), 44 deletions(-)
> > >
> > > --
> > > 2.43.0
> > >
> >
> >
> > --
> > Masami Hiramatsu (Google) <mhiramat@...nel.org>


-- 
Masami Hiramatsu (Google) <mhiramat@...nel.org>