linux-kernel - Re: [PATCH] Use extents for recording what swap is allocated.

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Message-ID: <20061025102054.GA4281@kernel.dk>
Date:	Wed, 25 Oct 2006 12:20:55 +0200
From:	Jens Axboe <jens.axboe@...cle.com>
To:	Nigel Cunningham <ncunningham@...uxmail.org>
Cc:	Christoph Hellwig <hch@...radead.org>,
	Andrew Morton <akpm@...l.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] Use extents for recording what swap is allocated.

On Wed, Oct 25 2006, Nigel Cunningham wrote:
> On Wed, 2006-10-25 at 11:17 +0200, Jens Axboe wrote:
> > On Wed, Oct 25 2006, Nigel Cunningham wrote:
> > > IIRC, I avoided list.h because I only wanted a singly linked list (it
> > > never gets traversed backwards). List.h looks to me like all doubly
> > > linked lists. Do you know if there are any other singly linked list
> > > implementations I could piggy-back?
> > 
> > Look closer in list.h, more specifically at the hlist_ entries.
> 
> Thanks for the pointer. I did look at it, but unless I'm misreading,
> it's still doubly linked. No matter. I'll use the doubly linked list.

It is, the head just takes up a pointer less. As hch mentioned, I doubt
it matters in this case at all.

-- 
Jens Axboe

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