linux-kernel - Re: [RFC][PATCH -mm 1/5] swsusp: Introduce memory bitmaps

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Date:	Wed, 9 Aug 2006 12:57:16 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Pavel Machek <pavel@...e.cz>
Cc:	LKML <linux-kernel@...r.kernel.org>, Linux PM <linux-pm@...l.org>
Subject: Re: [RFC][PATCH -mm 1/5] swsusp: Introduce memory bitmaps

Hi,

On Wednesday 09 August 2006 12:31, Pavel Machek wrote:
> > Introduce the memory bitmap data structure and make swsusp use in the suspend
> > phase.
> > 
> > The current swsusp's internal data structure is not very efficient from the
> > memory usage point of view, so it seems reasonable to replace it with a data
> > structure that will require less memory, such as a pair of bitmaps.
> 
> Well, 500 lines of code  for what... 0.25% bigger image? I see it
> enables you to do some cleanups... but could we get those cleanups
> without those 500 lines? :-).

Out of the 500 lines, something like 100 are comments and other 50 are
definitions of structures. ;-)

Seriously speaking, I could do that without the bitmaps, but the code wouldn't
be that much shorter.  Apart from this, I would need to introduce yet another
type of PBEs (for storing pfns) and try not to get lost in the resulting mess.

Instead of doing this I prefer to add some extra code to set up a decent data
structure and just use it.

Rafael

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