linux-kernel - Re: [PATCH v2] kernel/hung_task: add option to ignore task

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Message-ID: <YzRPl/R7o6qjbsM1@hirez.programming.kicks-ass.net>
Date:   Wed, 28 Sep 2022 15:43:51 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Kassey Li <quic_yingangl@...cinc.com>
Cc:     mingo@...hat.com, linux-kernel@...r.kernel.org,
        quic_namajain@...cinc.com
Subject: Re: [PATCH v2] kernel/hung_task: add option to ignore task

On Wed, Sep 28, 2022 at 03:48:41PM +0800, Kassey Li wrote:
> By default, hung_task will iterate the tasklist and check
> state in TASK_UNINTERRUPTIBLE with a given timeout value.
> 
> Here we add an option for task_struct so it can be ignored.
> Set this flag to default true, it do not break the origin design.
> 
> This is useful when we set timeout value to 5s, where we just want
> to detect some tasks interested.

What the hell for?