linux-kernel - Re: [PATCH/RFC] core/nfsd: allow kernel threads to use task

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Date:   Wed, 29 Nov 2023 12:38:30 +0100
From:   Christian Brauner <brauner@...nel.org>
To:     Oleg Nesterov <oleg@...hat.com>
Cc:     NeilBrown <neilb@...e.de>, Al Viro <viro@...iv.linux.org.uk>,
        Jens Axboe <axboe@...nel.dk>,
        Chuck Lever <chuck.lever@...cle.com>,
        Jeff Layton <jlayton@...nel.org>,
        Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Juri Lelli <juri.lelli@...hat.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-nfs@...r.kernel.org
Subject: Re: [PATCH/RFC] core/nfsd: allow kernel threads to use task_work.

On Tue, Nov 28, 2023 at 06:29:59PM +0100, Oleg Nesterov wrote:
> Forgot to menstion,
> 
> On 11/28, Oleg Nesterov wrote:
> >
> > but please
> > note irq_thread()->task_work_add(on_exit_work).
> 
> and this means that Neil's and your more patch were wrong ;)

Hm, that's all the more reason to not hang this off of PF_KTHREAD then.
I mean, it's functional but we likely wouldn't have run into this
confusion if this would be PF_FPUT_DELAYED, for example.