Re: Re: swsusp limits

[Pavel Machek <pavel@ucw.cz>]

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Hi!

> > > Is there an option or possibility of using a dedicated swap
> > > partition for suspend to disk?
> > > Or maybe there is no reason to think that this might help?
> > 
> > I don't see how it could help.
> 
> If it was turned on at the right time, it might not be used by other
> things that could get swapped out by high memory usage and/or the memory
> eating process.

Yes, but if it is used all the time, it will work okay, too.

> > > If my application(s) causes lots of memory & swap space
> > > to be used (over half of the total system RAM), is it correct
> > > that it is likely to be useless to try to suspend to disk
> > > while that app is running?
> > 
> > No, it should work okay, as long as you do not mlock() it. Just prepare
> > big enough swap partition.
> 
> Will he even need to worry about the size of his swap partition? I
> though swsusp discarded everything it could anyway. (Perhaps you could
> add this question to the FAQ too).

If he has *lot* of data, he needs big swap partition. Of course,
everything I _can_ discard will be discarded.

This is what I ended up:
							Pavel

diff --git a/Documentation/power/swsusp.txt b/Documentation/power/swsusp.txt
--- a/Documentation/power/swsusp.txt
+++ b/Documentation/power/swsusp.txt
@@ -334,3 +334,18 @@ some kind of "really read-only!" option.
 image (and blocksize), with resume parameter pointing directly to
 suspend header.
 
+Q: Is there a maximum system RAM size that is supported by swsusp?
+
+A: It should work okay with highmem.
+
+Q: Does swsusp (to disk) use only one swap partition or can it use
+multiple swap partitions (aggregate them into one logical space)?
+
+A: Only one swap partition, sorry.
+
+Q: If my application(s) causes lots of memory & swap space to be used
+(over half of the total system RAM), is it correct that it is likely
+to be useless to try to suspend to disk while that app is running?
+
+No, it should work okay, as long as your app does not mlock() it. Just
+prepare big enough swap partition.


-- 
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