Mailinglist Archive: opensuse-mobile (36 mails)

[Martin Hofius <Martin@xxxxxxxxxxxxxxxxx>]

Hi Wilfried,

Am Dienstag, 1. Mai 2007 19:03 schrieb Wilfried Maschtera:
> On Tue, May 01, 2007 at 02:04:30PM +0200, Martin Hofius wrote:
> > Am Dienstag, 1. Mai 2007 12:03 schrieb Pramod:
...
> > > 1) I would like to have the option of suspending Linux and resuming
> > > Windows and vice versa
> > > without booting either OS (as it used to be with Suse 10.0). At the
...
> > Hi Pramod,
> > sorry I have no other useful hints, but:  are Your shure to know what You
> > are doing??? I remember the choice after suspend was disabled by SuSE to
> > prevent the destroying of Your data...
> > When one of the both systems is suspended, also the state information of
> > the file systems are saved. If You would start an other system and change
> > files in that filesystem, You may image what happens?
> > If it was possible in SuSE 10.0 I gues it was a bug!?!
>
> Why should it be a bug? In my opinion if the state information of the
> systems are stored in different locations suspending one system and
> resuming another one is not risky but of course you should mount files
> from a suspend system read/writeable. I think, windows will not use
> the linux swap.
Do You really mount your partitions from suspended system read/writeable??? 
One example:
I assume to have windows with a fat32 partition (to exchange data with linux) 
and run linux with the linux partitions (of course...) and the fat32 
partition mounted. Then I suspend linux and use windows to write some files 
to the fat32 partition . I'm not shure that all changes made by linux are 
completly written to the disk... ok, linux kernel sources are available, 
perhaps can one of the kernel developers answer this...

Then I suspend windows and start linux. Every operating system stores 
information about nodes, trees or fat sectors in RAM. So I think this 
information goes to the swap partition on suspend. And now - the changes made 
by windows are different to the state stored in the linux swap.

Maybe the linux kernel is very good and compares this stored information with 
the actual information on the windows partition - and cleans the cache?

What's about the next step? Linux writes somes files to the fat32 partition 
and windows resumes? Windows does'nt know anything about other operating 
systems ("I am windows, your operation system. You may not use other systems 
than windows ;-))

I cannot exclude that it can work without problems for a log time - but 
nevertheless I'm NOT shure that it is safe to do it except all comon data 
partitions are mounted readonly (but than I can't exchange data between the 
systems).

I for myself solved this problem by using two computers one for windows (video 
processing ...) and one for linux (for all other work). And since a few month 
I use vmware and can have to systems on one computer - at the very same time, 
not for video processing, but to proof web site layouts with ie or programm 
with visual studio (grrrrrr, but some people seem to need really).

Greetings
Martin
>
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