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From: Thomas Gleixner <tglx@linutronix.de>
To: Jens Axboe <axboe@kernel.dk>, Oleg Nesterov <oleg@redhat.com>
Cc: linux-kernel@vger.kernel.org, io-uring@vger.kernel.org,
	peterz@infradead.org
Subject: Re: [PATCH 3/3] task_work: use TIF_TASKWORK if available
Date: Fri, 02 Oct 2020 21:10:40 +0200	[thread overview]
Message-ID: <87y2kocukv.fsf@nanos.tec.linutronix.de> (raw)
In-Reply-To: <4c9dbcc4-cae7-c7ad-8066-31d49239750a@kernel.dk>

On Fri, Oct 02 2020 at 09:52, Jens Axboe wrote:
> On 10/2/20 9:31 AM, Thomas Gleixner wrote:
>>> This way task_work_run() doesn't need to clear TIF_NOTIFY_SIGNAL and it can
>>> have more users.
>> 
>> I think it's fundamentaly wrong that we have several places and several
>> flags which handle task_work_run() instead of having exactly one place
>> and one flag.
>
> I don't disagree with that. I know it's not happening in this series, but
> if we to the TIF_NOTIFY_SIGNAL route and get all archs supporting that,
> then we can kill the signal and notify resume part of running task_work.
> And that leaves us with exactly one place that runs it.
>
> So we can potentially improve the current situation in that regard.

I'll think about it over the weekend.

  parent reply	other threads:[~2020-10-02 19:10 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-01 19:42 [PATCHSET RFC 0/3] kernel: decouple TASK_WORK TWA_SIGNAL handling from signals Jens Axboe
2020-10-01 19:42 ` [PATCH 1/3] kernel: add task_sigpending() helper Jens Axboe
2020-10-01 19:42 ` [PATCH 2/3] kernel: decouple TASK_WORK TWA_SIGNAL handling from signals Jens Axboe
2020-10-01 19:42 ` [PATCH 3/3] task_work: use TIF_TASKWORK if available Jens Axboe
2020-10-02 15:14   ` Oleg Nesterov
2020-10-02 15:31     ` Thomas Gleixner
2020-10-02 15:38       ` Oleg Nesterov
2020-10-02 16:18         ` Jens Axboe
2020-10-03  1:49         ` Thomas Gleixner
2020-10-03 15:35           ` Jens Axboe
2020-10-02 15:52       ` Jens Axboe
2020-10-02 16:42         ` Jens Axboe
2020-10-02 19:10         ` Thomas Gleixner [this message]
2020-10-02 20:14           ` Jens Axboe
2020-10-02 15:53     ` Jens Axboe

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