From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andi Kleen <andi@firstfloor.org>
Subject: Re: [PATCH 4/6] fs: Introduce a per_cpu nr_inodes
Date: Thu, 27 Nov 2008 11:07:01 +0100
Message-ID: <87zljl32ka.fsf@basil.nowhere.org>
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In-Reply-To: <1227778377.4454.1299.camel@twins> (Peter Zijlstra's message of "Thu, 27 Nov 2008 10:32:57 +0100")
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To: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Eric Dumazet <dada1@cosmosbay.com>, Ingo Molnar <mingo@elte.hu>, David Miller <davem@davemloft.net>, "Rafael J. Wysocki" <rjw@sisk.pl>, linux-kernel@vger.kernel.org, kernel-testers@vger.kernel.org, Mike Galbraith <efault@gmx.de>, Linux Netdev List <netdev@vger.kernel.org>, Christoph Lameter <cl@linux-foundation.org>, Christoph Hellwig <hch@infradead.org>, travis <travis@sgi.com>

Peter Zijlstra <a.p.zijlstra@chello.nl> writes:
>>  
>> +int get_nr_inodes(void)
>> +{
>> +	int cpu;
>> +	int counter = 0;
>> +
>> +	for_each_possible_cpu(cpu)
>> +	    counter += per_cpu(nr_inodes, cpu);
>> +	if (counter < 0)
>> +		counter = 0;
>> +	return counter;
>> +}
>
> It would be good to get a cpu hotplug handler here and move to
> for_each_online_cpu(). People are wanting distro's to be build with
> NR_CPUS=4096.

Doesn't matter, possible cpus is always only set to what the
machine supports.

-Andi
-- 
ak@linux.intel.com