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

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Date: Tue, 19 Mar 2024 13:26:13 +0900
From: Masami Hiramatsu (Google) <mhiramat@...nel.org>
To: Masami Hiramatsu (Google) <mhiramat@...nel.org>
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 13:20:57 +0900
Masami Hiramatsu (Google) <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.

Ah, and 

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

for this series.

> 
> 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>