linux-kernel - Re: [PATCH 05/12] unwind: Add comment to unwind_deferred_task

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Message-ID: <20251022111653.2b04308d@gandalf.local.home>
Date: Wed, 22 Oct 2025 11:16:53 -0400
From: Steven Rostedt <rostedt@...dmis.org>
To: Peter Zijlstra <peterz@...radead.org>
Cc: jpoimboe@...nel.org, rostedt@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 05/12] unwind: Add comment to
 unwind_deferred_task_exit()

On Mon, 20 Oct 2025 12:16:02 +0200
Peter Zijlstra <peterz@...radead.org> wrote:

> > I would state that it also flushes any unwind that is currently pending, as
> > exit_mm() will prevent it from happening.  
> 
> It now reads:
> 
> +       /*
> +        * PF_EXITING (above) ensures unwind_deferred_request() will no
> +        * longer add new unwinds. While exit_mm() (below) will destroy the
> +        * abaility to do unwinds. So flush any pending unwinds here.
> +        */
> +       unwind_deferred_task_exit(tsk);

Thanks,

Reviewed-by: Steven Rostedt (Google) <rostedt@...dmis.org>

-- Steve