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Rafael J. Wysocki wrote:
> On Tuesday, 31 October 2006 04:42, John Richard Moser wrote:
>> Something dumb came into my head, and the question is thus brought up
>> here: Do we HAVE to use swap for suspend to disk? How about the file
>> system?
>
> In short, we could use regular files for the suspend in the same way in which we
> use them for swap. Namely, we could bmap() a file and create a map of it
> (eg. with extents) that would be used for accessing the corresponding disk
> sectors at the block device level. Then, to be able to read the image the
> resume code would have to be provided with the number of the sector in which
> the suspend image header is located.
>
> However, we already have code that allows us to use swap files for the suspend
> and turning a regular file into a swap file is as easy as running 'mkswap' and
> 'swapon' on it.
And the kernel can survive being loaded, mounting a file system
readonly, activating swapon on the swap file on the read-only file
system, and then resuming from it?
Also, the file system is consistent after a suspend to disk?
I believe I mentioned something about compressing the image as well...
>
> Greetings,
> Rafael
>
>
- --
We will enslave their women, eat their children and rape their
cattle!
-- Bosc, Evil alien overlord from the fifth dimension
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