linux-kernel - Re: [PATCH net-next] net: allocate skbs on local node

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Message-ID: <4CB6A1AB.4030800@cs.helsinki.fi>
Date:	Thu, 14 Oct 2010 09:22:35 +0300
From:	Pekka Enberg <penberg@...helsinki.fi>
To:	David Rientjes <rientjes@...gle.com>
CC:	Christoph Lameter <cl@...ux.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Eric Dumazet <eric.dumazet@...il.com>,
	David Miller <davem@...emloft.net>,
	netdev <netdev@...r.kernel.org>,
	Michael Chan <mchan@...adcom.com>,
	Eilon Greenstein <eilong@...adcom.com>,
	Christoph Hellwig <hch@....de>,
	LKML <linux-kernel@...r.kernel.org>,
	Nick Piggin <npiggin@...nel.dk>
Subject: Re: [PATCH net-next] net:  allocate skbs on local node

On Wed, 13 Oct 2010, Christoph Lameter wrote:
>>> I was going to mention that as an idea, but I thought storing the metadata
>>> for certain debugging features might differ from the two allocators so
>>> substantially that it would be even more convoluted and difficult to
>>> maintain?
>>
>> We could have some callbacks to store allocator specific metadata?

On 10/14/10 1:41 AM, David Rientjes wrote:
> It depends on whether we could share the same base for both slab (unified
> allocator) and slub, which you snipped from your reply, that would make
> this cleaner.

Argh. Why would we want to introduce something that's effectively a new 
allocator based on SLUB? If there's something controversial in the 
current patch series, lets just keep it out of mainline. A "rewrite" is 
the reason we're in this mess so lets not repeat the same mistake again!

			Pekka
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