linux-kernel - Re: [PATCH] kthread: set kthread state to TASK

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Message-ID: <20200401111217.GC20713@hirez.programming.kicks-ass.net>
Date:   Wed, 1 Apr 2020 13:12:17 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Li Yueyi <liyueyi@...e.com>
Cc:     "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        liyueyi <liyueyi@...omi.com>
Subject: Re: [PATCH] kthread: set kthread state to TASK_IDLE.


A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing in e-mail?

On Wed, Apr 01, 2020 at 10:40:28AM +0000, Li Yueyi wrote:
> I create a kthread to do some work will trigger system restart, i don`t wake it up immediately but wakeup it in a HW irq handler.
> So this kthread sleeps in TASK_UNINTERRUPTIBLE state until the HW irq coming up.
> 
> Did i do something wrong?
> Should i wake it up immediately and then call wait_event_xxxx function to sleep it?

This!