linux-kernel - Re: [PATCH v2] tracing: Introduce pipe_cpumask to avoid race on trace

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Message-ID: <20230821111725.4bfbe7c5@gandalf.local.home>
Date:   Mon, 21 Aug 2023 11:17:25 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     "Masami Hiramatsu (Google)" <mhiramat@...nel.org>
Cc:     Zheng Yejian <zhengyejian1@...wei.com>, <laijs@...fujitsu.com>,
        <linux-kernel@...r.kernel.org>,
        <linux-trace-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] tracing: Introduce pipe_cpumask to avoid race on
 trace_pipes

On Sat, 19 Aug 2023 10:42:57 +0900
Masami Hiramatsu (Google) <mhiramat@...nel.org> wrote:

> >From 92242480285448360c9390a743ea7b3751bb3e61 Mon Sep 17 00:00:00 2001  
> From: "Masami Hiramatsu (Google)" <mhiramat@...nel.org>
> Date: Thu, 17 Aug 2023 14:08:40 +0900
> Subject: [PATCH 1/3] tools/virtio-trace: Ignore EAGAIN error on splice()
> 
> splice() can return EAGAIN error instead of returning 0 size read.
> In that case, wait a while and try to call splice() again.
> 
> Signed-off-by: Masami Hiramatsu (Google) <mhiramat@...nel.org>

Bah,

When I pulled in Zheng's patch from patchwork, it included the above
signed-off-by. I was confused to why it added your SoB.

Probably best if we had started this conversation on another thread and
not hijack the discussion about this patch.

-- Steve


> ---
>  tools/virtio/virtio-trace/trace-agent-rw.c | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)