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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <200608091257.16663.rjw@sisk.pl>
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

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/