From mboxrd@z Thu Jan  1 00:00:00 1970
From: Christoph Lameter <christoph@lameter.com>
Date: Thu, 31 Mar 2005 15:35:00 +0000
Subject: Re: Fwd: [PATCH] Pageset Localization V2
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To: Christoph Hellwig <hch@infradead.org>
Cc: shobhit dayal <shobhit@calsoftinc.com>, manfred@colorfullife.com, akpm@osdl.org, linux-kernel@vger.kernel.org, linux-ia64@vger.kernel.org, linux-mm@kvack.org, Shai Fultheim <shai@scalex86.org>

On Thu, 31 Mar 2005, Christoph Hellwig wrote:

> On Wed, Mar 30, 2005 at 06:36:18PM +0530, shobhit dayal wrote:
> > The goal here is to replace the head of a existing list pointed to by
> > 'list' with a new head pointed to by 'nlist'.
> > First there is a memcpy that copies the contents of list to nlist then
> > this macro is called.
> > The macro makes sure that if the old head was empty then INIT_LIST_HEAD
> > the 'nlist', if not then make sure that the nodes before and after the
> > head now correclty point to nlist instead of list.
>
> Which would be much nicer done using INIT_LIST_HEAD on the new head
> always and then calling list_replace (of which currently only a _rcu variant
> exists).
>
> Note to Christoph:  Just duplicating the code doesn't make it better ;-)

I will need the loop there for the  prezeroing stuff later.