linux-kernel - Re: [PATCH 3/3] sched: Implement task_nice and task

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20140127103258.GZ11314@laptop.programming.kicks-ass.net>
Date:	Mon, 27 Jan 2014 11:32:58 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Dongsheng Yang <yangds.fnst@...fujitsu.com>
Cc:	linux-kernel@...r.kernel.org, raistlin@...ux.it,
	juri.lelli@...il.com, clark.williams@...il.com, mingo@...hat.com,
	rostedt@...dmis.org
Subject: Re: [PATCH 3/3] sched: Implement task_nice and task_prio as static
 inline functions.

On Mon, Jan 27, 2014 at 05:15:39PM -0500, Dongsheng Yang wrote:
> +/**
> + * task_prio - return the priority value of a given task.
> + * @p: the task in question.
> + *
> + * Return: The priority value as seen by users in /proc.
> + * RT tasks are offset by -200. Normal tasks are centered
> + * around 0, value goes from -16 to +15.
> + */
> +static inline int task_prio(const struct task_struct *p)
> +{
> +	return p->prio - MAX_RT_PRIO;
> +}

Who would ever want to use/rely on this? It doesn't make any sense. And
therefore it shouldn't ever be considered time critical.

> +/**
> + * task_nice - return the nice value of a given task.
> + * @p: the task in question.
> + *
> + * Return: The nice value [ -20 ... 0 ... 19 ].
> + */
> +static inline int task_nice(const struct task_struct *p)
> +{
> +	return TASK_NICE(p);
> +}

Urgh, no. Just remove the macro already. Although arguably we should
remove ->static_prio and clean up that entire mess.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/