netdev - Re: cat /proc/net/tcp takes 0.5 seconds on x86

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Message-Id: <20080827.153907.157997966.davem@davemloft.net>
Date:	Wed, 27 Aug 2008 15:39:07 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	andi@...stfloor.org
Cc:	davej@...hat.com, netdev@...r.kernel.org, j.w.r.degoede@....nl
Subject: Re: cat /proc/net/tcp takes 0.5 seconds on x86_64

From: Andi Kleen <andi@...stfloor.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?
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