linux-kernel - Re: [RFC][PATCH -mm] swsusp: Use rbtree for tracking allocated swap

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Date:	Tue, 10 Apr 2007 07:00:52 +1000
From:	Nigel Cunningham <nigel@...el.suspend2.net>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Pavel Machek <pavel@....cz>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [RFC][PATCH -mm] swsusp: Use rbtree for tracking allocated swap

Hi.

On Mon, 2007-04-09 at 15:03 +0200, Rafael J. Wysocki wrote:
> On Sunday, 8 April 2007 23:07, Nigel Cunningham wrote:
> [--snip--]
> > > > Normal usage in both cases is simply iterating through the list, so I
> > > > guess the cost would be approximately the same.
> > > > 
> > > > Deletion could would include rebalancing for the rb_nodes.
> > > 
> > > In swsusp the deletions are needed only if there's an error.
> > 
> > When freeing swap at the end of the cycle?
> 
> That depends on what you mean by 'the end'. :-)
> 
> We free swap if the image saving fails only, since it's allocated after we've
> created the image.  After the resume, the state of swap from before the image
> creation is the current one anyway.

Ah, of course. I forgot that temporarily.

Nigel

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