linux-kernel - Re: [PATCH V3] tracing/timerlat: Hotplug support for the user-space interface

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Date:   Wed, 4 Oct 2023 12:02:52 +0200
From:   Daniel Bristot de Oliveira <bristot@...nel.org>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     Masami Hiramatsu <mhiramat@...nel.org>,
        linux-trace-kernel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH V3] tracing/timerlat: Hotplug support for the user-space
 interface

On 10/4/23 03:03, Steven Rostedt wrote:
> On Fri, 29 Sep 2023 17:02:46 +0200
> Daniel Bristot de Oliveira <bristot@...nel.org> wrote:
> 
>> The osnoise/per_cpu/CPU$/timerlat_fd is create for each possible
>> CPU, but it might create confusion if the CPU is not online.
>>
>> Create the file only for online CPUs, also follow hotplug by
>> creating and deleting as CPUs come and go.
>>
>> Fixes: e88ed227f639 ("tracing/timerlat: Add user-space interface")
> 
> Is this a fix that needs to go in now and Cc'd to stable? Or is this
> something that can wait till the next merge window?

We can wait for the next merge window... it is a non-trivial fix.

-- Daniel
> -- Steve