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From: David Miller <davem@davemloft.net>
Subject: Re: cat /proc/net/tcp takes 0.5 seconds on x86_64
Date: Wed, 27 Aug 2008 15:39:07 -0700 (PDT)
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From: Andi Kleen <andi@firstfloor.org>
Date: Thu, 28 Aug 2008 00:34:10 +0200

> It fixes an old performance problem at least. I'm not aware 
> of any new ones in this area because the code in this 
> function hasn't changed since I last looked.

That's exactly what this thread is about, things got slower for
some reason even though nothing specifically changed in this area.

I wonder if indirectly something changed in how the hash table
allocator code down in mm/*.c works, perhaps it's taking NUMA
into account differently now?