From: "Rafael J. Wysocki" <rjw@sisk.pl>
To: Stefan Seyfried <seife@suse.de>
Subject: Re: [PATCH][mm] swsusp: limit image size
Date: Fri, 9 Dec 2005 18:04:21 +0100
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Cc: Pavel Machek <pavel@suse.cz>, LKML <linux-kernel@vger.kernel.org>,
       Andrew Morton <akpm@osdl.org>
References: <200512072246.06222.rjw@sisk.pl> <4399A737.40809@suse.de>
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On Friday, 9 December 2005 16:48, Stefan Seyfried wrote:
> Rafael J. Wysocki wrote:
> 
> > The following patch limits the size of the suspend image to approx. 500 MB,
> > which should improve the overall performance of swsusp on systems with
> > more than 1 GB of RAM.
> > 
> > It introduces the constant IMAGE_SIZE that can be set to the preferred size
> > of the image (in MB) and modifies the memory-shrinking part of
> > swsusp to take this constant into account (500 is the default value
> > of IMAGE_SIZE).
> 
> What happens if IMAGE_SIZE is bigger than free swap? Do we "try harder"
> or do we fail?

First, with swsusp the image can't be bigger than 1/2 of lowmem (1/2 of RAM
on x86-64) and the too great values of IMAGE_SIZE have no effect.  Still, if
the amount of free swap is smaller than 1/2 of RAM and the image happens
to be bigger, we will fail.

Greetings,
Rafael


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