Re: [PATCH v2] tracing: Introduce pipe_cpumask to avoid race on trace_pipes

[Steven Rostedt]

On Fri, 18 Aug 2023 14:03:09 +0900
Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx> wrote:

> Looks good to me. 
> 
> Reviewed-by: Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx>
> 
> BTW, this reminds me that splice read support had been introduced for
> virtio-trace support. I've tested it with/without this patch, but I hit
> a different issue, which seems like a virtio-serial issue (per-cpu buffers
> on the guest are spliced correctly, but the data can not be read from host
> side). Let me investigate it.

Is virtio-trace using trace_pipe or trace_pipe_raw? Those two are handled
differently.

-- Steve