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

From: Tang Chen
Date: Tue Sep 25 2012 - 08:00:47 EST


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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