Date: Wed, 22 Feb 2006 23:24:45 +0100
From: Pavel Machek <pavel@ucw.cz>
To: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Nigel Cunningham <ncunningham@cyclades.com>,
       Dmitry Torokhov <dtor_core@ameritech.net>,
       Andreas Happe <andreashappe@snikt.net>, linux-kernel@vger.kernel.org,
       Suspend2 Devel List <suspend2-devel@lists.suspend2.net>
Subject: Re: Which is simpler? (Was Re: [Suspend2-devel] Re: [ 00/10] [Suspend2] Modules support.)
Message-ID: <20060222222445.GA13796@elf.ucw.cz>
References: <20060201113710.6320.68289.stgit@localhost.localdomain> <200602212140.57566.rjw@sisk.pl> <200602220700.55207.ncunningham@cyclades.com> <200602220038.18054.rjw@sisk.pl>
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Hi!

> > It is doable - I'm doing it now, but am thinking about reverting part of the 
> > code to use pbes again. If you're going to look at using bitmaps in place of 
> > pbes, me changing would be a waste of time. Do you want me to hold off for a 
> > while? (I'll happily do that, as I have far more than enough to keep me 
> > occupied at the moment anyway).
> 
> Well, I'd say so. :-)
> 
> Frankly, I didn't think of dropping PBEs right now, but in the long run
> that's worth considering, IMO.  The advantage of PBEs is that they are easy to
> handle in the assembly parts, but apart from this they are a bit wasteful
> (not very much, though).

Of course it will depend on what patch looks like, but changing
assembly parts is hard -- you have to change all the architectures,
and better not make any mistake.

> The fact that we use page flags to store some suspend/resume-related
> information is a big disadvantage in my view, and I'd like to get rid of that
> in the future.  In principle we could use a bitmap, or rather two of them,
> to store the same information independently of the page flags, and
> if we use bitmaps for this purpose, we can use them also instead of
> PBEs.

Well, we "only" use 2 bits... :-).
								Pavel
-- 
Web maintainer for suspend.sf.net (www.sf.net/projects/suspend) wanted...
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