Re: Where do you put your swap partition?
On Mon, 21 Jan 2008 20:51:14 -0200
Henrique de Moraes Holschuh <hmh@debian.org> wrote:
> On Mon, 21 Jan 2008, Thomas Flaig wrote:
> > Am Montag, 21. Januar 2008 15:50 schrieb Ron Johnson:
> > > On 01/21/08 03:16, Thomas Flaig wrote:
> > > > Am Samstag, 19. Januar 2008 03:30 schrieb Ron Johnson:
[snip]
> > > > CONFIG_PM_STD_PARTITION="/dev/sdaX"
> > Does this also work for a swap *file*? Or do I need a swap partition?
>
> It can be made to work on files, yes. At least if you use tux-on-ice, which
> is moderately more sane than that userspace suspend thing. Not that the
> resume from hibernation in Linux is sane on ACPI systems (it is NOT), so I
> have to recommend sticking to sleep-to-RAM unless you really need
> hibernation.
>
> And protecting the hibernation data properly is a pain that requires
> passphrases, anyway, so that's two reasons to stay away from it.
>
> > If it works with a swap *file* I would like to see an explanation how to
> > do this or a link to a HOWTO.
>
> Stock userspace suspend might not be able to hibernate to a swap file. But
> check http://www.tuxonice.net/, it can do it.
I believe stock uswsusp *can* use a swap file. From the HOWTO.gz (I
haven't tried this):
> 1) Necessary items
>
> (a) This package
> (b) Linux kernel supporting the swsusp userland interface (2.6.17 or above)
> (c) Swap partition or a swap file, approximately as big as 1/2 of RAM
...
> It also is possible to use a swap file for suspending, but this only works with
> the 2.6.18-mm3 kernel (or later). In such a case the resume partition is the
> partition that holds the swap file, and there is an additional configuration
> parameter "resume offset" that has to be set, as described below.]
...
> The "resume offset" parameter is necessary if a swap file is used for
> suspending. In such a case the device identified by the "resume device"
> parameter is regarded as the partition that contains the swap file, and
> "resume offset" must be equal to the offset from the beginning of this
> partition at which the swap file's header is located, in <PAGE_SIZE> units.
> The value of this parameter for given swap file can be determined by the
> swap-offset program (has to be run as root) included in this package. [For
> this feature to work, you will need an -mm kernel, 2.6.18-mm3 or newer.]
Celejar
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