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From: Andy Lutomirski <luto@kernel.org>
To: Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
	linux-kernel@vger.kernel.org, linux-ia64@vger.kernel.org
Cc: Ben Segall <bsegall@google.com>,
	Daniel Bristot de Oliveira <bristot@redhat.com>,
	Dietmar Eggemann <dietmar.eggemann@arm.com>,
	Ingo Molnar <mingo@redhat.com>,
	Juri Lelli <juri.lelli@redhat.com>,
	Peter Zijlstra <peterz@infradead.org>,
	Steven Rostedt <rostedt@goodmis.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Vincent Guittot <vincent.guittot@linaro.org>
Subject: Re: [PATCH 6/8] kernel/fork: Move task stack account to do_exit().
Date: Fri, 11 Feb 2022 15:43:50 -0800	[thread overview]
Message-ID: <55812c89-484d-6981-32f4-aaf20908f631@kernel.org> (raw)
In-Reply-To: <20220125152652.1963111-7-bigeasy@linutronix.de>

On 1/25/22 07:26, Sebastian Andrzej Siewior wrote:
> There is no need to perform the stack accounting of the outgoing task in
> its final schedule() invocation which happens with disabled preemption.
> The task is leaving, the resources will be freed and the accounting can
> happen in do_exit() before the actual schedule invocation which
> frees the stack memory.
> 
> Move the accounting of the stack memory from release_task_stack() to
> exit_task_stack_account() which then can be invoked from do_exit().

Seems reasonable.

  reply	other threads:[~2022-02-11 23:43 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-01-25 15:26 [PATCH REPOST 0/8] kernel/fork: Move thread stack free otu of the scheduler path Sebastian Andrzej Siewior
2022-01-25 15:26 ` [PATCH 1/8] kernel/fork: Redo ifdefs around task's handling Sebastian Andrzej Siewior
2022-01-25 15:26 ` [PATCH 2/8] kernel/fork: Duplicate task_struct before stack allocation Sebastian Andrzej Siewior
2022-02-11 23:42   ` Andy Lutomirski
2022-02-14 11:39     ` Sebastian Andrzej Siewior
2022-01-25 15:26 ` [PATCH 3/8] kernel/fork, IA64: Provide a alloc_thread_stack_node() for IA64 Sebastian Andrzej Siewior
2022-02-14 18:00   ` Sebastian Andrzej Siewior
2022-01-25 15:26 ` [PATCH 4/8] kernel/fork: Don't assign the stack pointer in dup_task_struct() Sebastian Andrzej Siewior
2022-01-25 15:26 ` [PATCH 5/8] kernel/fork: Move memcg_charge_kernel_stack() into CONFIG_VMAP_STACK Sebastian Andrzej Siewior
2022-01-25 15:26 ` [PATCH 6/8] kernel/fork: Move task stack account to do_exit() Sebastian Andrzej Siewior
2022-02-11 23:43   ` Andy Lutomirski [this message]
2022-01-25 15:26 ` [PATCH 7/8] kernel/fork: Only cache the VMAP stack in finish_task_switch() Sebastian Andrzej Siewior
2022-02-11 23:55   ` Andy Lutomirski
2022-02-14 12:10     ` Sebastian Andrzej Siewior
2022-02-14 12:24       ` Sebastian Andrzej Siewior
2022-02-14 16:54         ` Sebastian Andrzej Siewior
2022-02-14 17:48           ` Sebastian Andrzej Siewior
2022-02-14 18:15             ` [PATCH v2 " Sebastian Andrzej Siewior
2022-01-25 15:26 ` [PATCH 8/8] kernel/fork: Use IS_ENABLED() in account_kernel_stack() Sebastian Andrzej Siewior
2022-02-08 17:10 ` [PATCH REPOST 0/8] kernel/fork: Move thread stack free otu of the scheduler path Sebastian Andrzej Siewior
  -- strict thread matches above, loose matches on Subject: below --
2021-11-18 14:34 [PATCH " Sebastian Andrzej Siewior
2021-11-18 14:34 ` [PATCH 6/8] kernel/fork: Move task stack account to do_exit() Sebastian Andrzej Siewior

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