linux-kernel - relax_domain_level boot parameter has no effect

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Message-ID: <20120601210348.GA22471@sgi.com>
Date:	Fri, 1 Jun 2012 16:03:48 -0500
From:	Dimitri Sivanich <sivanich@....com>
To:	Ingo Molnar <mingo@...e.hu>, Peter Zijlstra <peterz@...radead.org>
Cc:	linux-kernel@...r.kernel.org
Subject: relax_domain_level boot parameter has no effect

I noticed (and verified) that the relax_domain_level boot parameter does not
get processed because sched_domain_level_max is 0 at the time that
setup_relax_domain_level() is run.

int sched_domain_level_max;

static int __init setup_relax_domain_level(char *str)
{
        unsigned long val;

        val = simple_strtoul(str, NULL, 0);
        if (val < sched_domain_level_max)
                default_relax_domain_level = val;

        return 1;
}
__setup("relax_domain_level=", setup_relax_domain_level);


struct sched_domain *build_sched_domain(struct sched_domain_topology_level *tl,
..
                sched_domain_level_max = max(sched_domain_level_max, sd->level);
..
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