linux-kernel - Re: [RESEND 2] [PATCH] rlimits: Print more information when limits are exceeded

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Message-ID: <alpine.DEB.2.20.1703011055130.4005@nanos>
Date:   Wed, 1 Mar 2017 11:00:43 +0100 (CET)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Arun Raghavan <arun@...nraghavan.net>
cc:     linux-kernel@...r.kernel.org
Subject: Re: [RESEND 2] [PATCH] rlimits: Print more information when limits
 are exceeded

On Sat, 18 Feb 2017, Arun Raghavan wrote:

> This dumps some information in logs when a process exceeds its CPU or RT
> limits (soft and hard). Makes debugging easier when userspace triggers
> these limits.

Sigh. This changelog sucks. "dumps some information" is pretty useless and
it does not explain WHY you want to do that. Please structure the changelog
in a way which makes it easy to understand.

1) Problem description

2) Solution

> diff --git a/kernel/time/posix-cpu-timers.c b/kernel/time/posix-cpu-timers.c
> index e9e8c10..6dbcf84 100644
> --- a/kernel/time/posix-cpu-timers.c
> +++ b/kernel/time/posix-cpu-timers.c
> @@ -860,6 +860,9 @@ static void check_thread_timers(struct task_struct *tsk,
>  			 * At the hard limit, we just die.
>  			 * No need to calculate anything else now.
>  			 */
> +			printk(KERN_INFO

			pr_info("CPU Watchdog Timeout (hard): %s[%d]\n",

and no artificial line breaks, please.

Thanks,

	tglx