linux-kernel - Re: [PATCH 0/8] kernel/fork: Move thread stack free otu of the scheduler path.

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Message-ID: <20211118143850.ygpp7xetpz3pt2nj@linutronix.de>
Date:   Thu, 18 Nov 2021 15:38:50 +0100
From:   Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:     linux-kernel@...r.kernel.org, linux-ia64@...r.kernel.org,
        tglx@...utronix.de
Cc:     Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Andy Lutomirski <luto@...nel.org>,
        Juri Lelli <juri.lelli@...hat.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Ben Segall <bsegall@...gle.com>,
        Daniel Bristot de Oliveira <bristot@...hat.com>
Subject: Re: [PATCH 0/8] kernel/fork: Move thread stack free otu of the
 scheduler path.

+ tglx.

It starts at
   https://lore.kernel.org/all/20211118143452.136421-1-bigeasy@linutronix.de/

On 2021-11-18 15:34:44 [+0100], To linux-kernel@...r.kernel.org wrote:
> 
> This is a follup-up on the patch
>     sched: Delay task stack freeing on RT 
>     https://lkml.kernel.org/r/20210928122411.593486363@linutronix.de
> 
> It addresses the review feedback:
> - Decouple stack accounting from its free invocation. The accounting
>   happens in do_exit(), the final free call happens later.
> 
> - Add put_task_stack_sched() to finish_task_switch(). Here the VMAP
>   stack is cached only. If it fails, or in the !VMAP case then the final
>   free happens in delayed_put_task_struct(). This is also an oportunity
>   to cache the stack.

Sebastian