Re: [PATCH] Update sched_domains_numa_masks when new cpus are onlined.

Tang Chen <[email protected]> Tue, 25 Sep 2012 20:02:35 +0800
Newsgroups org.kernel.vger.linux-numa,org.kernel.vger.linux-kernel
Message-ID <[email protected]>
Hi Peter~

I will make a v2 patch-set following your comments
and resent it soon. :)

Thanks. :)

On 09/25/2012 07:50 PM, Peter Zijlstra wrote:
> On Tue, 2012-09-25 at 19:45 +0800, Tang Chen wrote:
>
>
>> Let's have an example here.
>>
>> sched_init_numa()
>> {
>> 	...
>> 	// A loop set sched_domains_numa_levels to level.-------------1
>>
>> 	// I set sched_domains_numa_levels to 0.
>> 	sched_domains_numa_levels = 0;--------------------------------2
>
> Ah, ok, so this 'idiot in a hurry' (aka. me) placed the hunk wrong and
> thought it was at the start of the function.
>
>> 	// A loop allocating memory for sched_domains_numa_masks[][]
>> 	for (i = 0; i<  level; i++) {
>> 		......
>> 		// Allocate memory for sched_domains_numa_masks[i]----3
>> 		......
>> 	}
>> 	......
>>
>> 	// I reset sched_domains_numa_levels to level.
>> 	sched_domains_numa_levels = level;----------------------------4
>> }
>
> Yes this makes sense, it might be best to have this as a separate patch.
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