linux-kernel - Re: [PATCH v10 9/9] cpuset: Allow reporting of sched domain generation info

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Message-ID: <20180620142023.GL2494@hirez.programming.kicks-ass.net>
Date:   Wed, 20 Jun 2018 16:20:23 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Waiman Long <longman@...hat.com>
Cc:     Tejun Heo <tj@...nel.org>, Li Zefan <lizefan@...wei.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Ingo Molnar <mingo@...hat.com>, cgroups@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
        kernel-team@...com, pjt@...gle.com, luto@...capital.net,
        Mike Galbraith <efault@....de>, torvalds@...ux-foundation.org,
        Roman Gushchin <guro@...com>,
        Juri Lelli <juri.lelli@...hat.com>,
        Patrick Bellasi <patrick.bellasi@....com>
Subject: Re: [PATCH v10 9/9] cpuset: Allow reporting of sched domain
 generation info

On Mon, Jun 18, 2018 at 12:14:09PM +0800, Waiman Long wrote:
> +#ifdef CONFIG_DEBUG_KERNEL
> +static inline void debug_print_domains(cpumask_var_t *doms, int ndoms)
> +{
> +	int i;
> +	char buf[200];
> +	char *ptr, *end = buf + sizeof(buf) - 1;
> +
> +	for (i = 0, ptr = buf, *end = '\0'; i < ndoms; i++)
> +		ptr += snprintf(ptr, end - ptr, "dom%d=%*pbl ", i,
> +				cpumask_pr_args(doms[i]));
> +
> +	pr_debug("Generated %d domains: %s\n", ndoms, buf);
> +}

Why not use pr_cont() and do away with that static buffer?