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

[Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>]

+ tglx.

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

On 2021-11-18 15:34:44 [+0100], To linux-kernel@xxxxxxxxxxxxxxx wrote:
> 
> This is a follup-up on the patch
>     sched: Delay task stack freeing on RT 
>     https://lkml.kernel.org/r/20210928122411.593486363@xxxxxxxxxxxxx
> 
> 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