From: Stefan Rompf <stefan@loplof.de>
To: Pavel Machek <pavel@suse.cz>
Subject: Re: [RFC] userland swsusp
Date: Thu, 17 Nov 2005 08:19:16 +0100
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Am Mittwoch 16 November 2005 20:07 schrieb Pavel Machek:

> No. Writing to file would trash the filesystem. But you can bmap the file,
> then write to the block device.

And for reading, I could used a device mapper enforced read only mount or 
filesystem code from grub.

Hmm, how about a possibility to ask the kernel for a list of free pages on a 
swap device? This way, userspace could write the image to swap as the kernel 
currently does, avoiding possible trouble with filesystems.

> Better avoid memory allocation.

And all memory allocated and mapped in advance would be part of the image. But 
this is totally acceptable for a "suspend helper".

Stefan
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