Re: [RFC][PATCH -mm][Experimental] suspend: Do not freeze md_threads

[Pavel Machek <pavel@ucw.cz>]

Hi!

> > > If there's a swap file on a software RAID, it should be possible to use this
> > > file for saving the swsusp's suspend image.  Also, this file should be
> > > available to the memory management subsystem when memory is being freed before
> > > the suspend image is created.
> > > 
> > > For the above reasons it seems that md_threads should not be frozen during
> > > the suspend and the appended patch makes this happen, but then there is the
> > > question if they don't cause any data to be written to disks after the
> > > suspend image has been created, provided that all filesystems are frozen
> > > at that time.
> > 
> > Looks okay to me. It would be nice to have someone (Ingo? Neil?) try
> > to suspend to swap on md......
> 
> Yes... suspending to swap-on-md would probably be fairly easy.
> Resuming from that same swap might be a bit more of a challenge.
> If only I had more time...

With uswsusp (scheduled for 10.2), it should be fairly easy, too. I
guess we shall just get Andrea to try it :-).
							Pavel 
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