Re: pm: Revert swsusp to 2.6.0-test3

[Nigel Cunningham <ncunningham@clear.net.nz>]

On Tue, 2003-09-30 at 04:51, Patrick Mochel wrote:
> > Could you also give me some clear direction on where you want me to put
> > my 2.4 port. Should it go in kernel/power, or somewhere else? (I'm
> > assuming you don't want 3 versions of swsusp?!). I'd like to put it in
> > the right place when I start populating swsusp25.bkbits.net, so you're
> > not pulling changesets later that only move the code around (I know bk
> > reduces the cost, but...).
> 
> Please put it in kernel/power/. 

Ok. I'll do that then.

> It's completely alright to have three suspend-to-disk implementations. For 
> one, porting it does not imply that it will be merged into mainline, as 
> is. I would like to see convergence of the competing solutions, and I 
> fully intend to leverage the work that you've done and integrate it into 
> the core power management code, and the pmdisk implementation. 
> 
> The power management core provides, among other things, a framework for 
> properly suspending and resuming a system. Persistant state retention is 
> one aspect, albeit the largest in terms of importance and sheer size. I 
> would like to see backend mechanism for storing state abstracted from the 
> snapshotting process.

I'd certainly like to see such additions somehow implemented as optional
extras. The core functionality ought not be a great monolithic mass.

> This means that there may be several low-level 'drivers' that each deal 
> with reading/writing data on a particular format. And, it means that much 

I've had enquiries about adding support for UML, NFS and encryption
support; they would match well with your desire for a more general
solution. 

> of the overhead of swsusp, etc, can be folded into the core PM code. 

Yes; I have a pretty clear distinction between the code for freezing
processes and syncing data and that which actually saves the data.

> I do not have more technical details about this ATM, but I will work with 
> you to make sure things are streamlined as much as possible during and 
> after your port.

Great. I'll start the work in earnest tomorrow. Today I'm packing up
books :>

Nigel

-- 
Nigel Cunningham
495 St Georges Road South, Hastings 4201, New Zealand

You see, at just the right time, when we were still powerless,
Christ died for the ungodly.
	-- Romans 5:6, NIV.