From: Jens Axboe <axboe@kernel.dk>
To: Oleg Nesterov <oleg@redhat.com>, Thomas Gleixner <tglx@linutronix.de>
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, 2 Oct 2020 10:18:15 -0600 [thread overview]
Message-ID: <19d2f8cc-320f-a4d1-79e3-fbdef3b44540@kernel.dk> (raw)
In-Reply-To: <20201002153849.GC29066@redhat.com>
On 10/2/20 9:38 AM, Oleg Nesterov wrote:
> On 10/02, Thomas Gleixner wrote:
>>
>> 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.
>
> Damn yes, agreed.
As mentioned in the other reply, this is actually a nice step towards
NOT having that be the case. Right now we have TWA_RESUME, which uses
TIF_NOTIFY_RESUME. Once all archs support TIF_NOTIFY_SIGNAL, then we can
totally drop TWA_NOTIFY resume, and use use TWA_SIGNAL as the default
for notify == true task_work users. And we can drop task_work noticing
and running in the signal handling as well, leaving us with only having
tracehook_notify_signal() running the task_work.
--
Jens Axboe
next prev parent reply other threads:[~2020-10-02 16:18 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 [this message]
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
2020-10-02 20:14 ` Jens Axboe
2020-10-02 15:53 ` Jens Axboe
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