linux-kernel - cpusets not cpu hotplug aware

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Message-ID: <20060821132709.GB8499@krispykreme>
Date:	Mon, 21 Aug 2006 23:27:09 +1000
From:	Anton Blanchard <anton@...ba.org>
To:	pj@....com, simon.derr@...l.net
Cc:	nathanl@...tin.ibm.com, linux-kernel@...r.kernel.org
Subject: cpusets not cpu hotplug aware


Hi,

We have a bug report where sched_setaffinity fails for cpus that are
hotplug added after boot. Nathan found this suspicious piece of code:

void __init cpuset_init_smp(void)
{
        top_cpuset.cpus_allowed = cpu_online_map;
        top_cpuset.mems_allowed = node_online_map;
}

Any reason we statically set the top level cpuset to the boot time cpu
online map?

Anton
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