linux-kernel - Re: [PATCH] hrtimer: Remove a warning message in hrtimer

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Message-ID: <87h77lhkzh.ffs@tglx>
Date:   Fri, 25 Mar 2022 20:48:18 +0100
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Rei Yamamoto <yamamoto.rei@...fujitsu.com>
Cc:     geert+renesas@...der.be, linux-kernel@...r.kernel.org,
        yamamoto.rei@...fujitsu.com
Subject: Re: [PATCH] hrtimer: Remove a warning message in hrtimer_interrupt()

On Thu, Feb 24 2022 at 18:28, Rei Yamamoto wrote:
> It seems the warning message in hrtimer_interrupt() has
> no an intention.
> The required action for the warning message in hrtimer_interrupt() 
> is not clear.

The required action is to figure out why the hrtimer interrupt is
looping for a long time.

> Remove this message not to confuse user.

No. This message is interesting because as a consequence of an overly
long hrtimer interrupt the hrtimer interrupt will be deferred so tasks
can make progress. That means for the time of deferral there will be no
hrtimers fire, which is confusing if the message is removed because you
cannot figure out the reason.

Thanks,

        tglx