Re: suspend2 merge (was Re: [Suspend2-devel] Re: CFS and suspend2: hang in atomic copy)

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Hi.

On Thu, 2007-04-26 at 17:06 -0400, Theodore Tso wrote:
> On Thu, Apr 26, 2007 at 08:56:48AM -0700, Linus Torvalds wrote:
> > 
> > 
> > On Thu, 26 Apr 2007, Pavel Machek wrote:
> > > 
> > > Yes, probably will. The other option is to break existing 32-bit
> > > userspace, which is a bit more common AFAICT.
> > 
> > And *this* is why kernel/userspace things simply should not be done.
> > 
> > It's simply better to do things entirely in the kernel. Because you add 
> > bugs and complications otherwise, and doing it in the kernel allows you 
> > to just switch things around.
> > 
> > As it is, it appears that user-space suspend is just broken whichever way 
> > we turn.
> 
> Well, in that case maybe suspend2 should be very seriously considered,
> since it has the features of uswsusp --- basic features which every
> single Microsoft and MacOSX user are used to like, like progress bars
> --- and it's all done in the kernel.

Umm. I don't want to be picky, but that's not quite true. The progress
bar is done in userspace.

There's also the possibility of using a userspace app to manage storage
too (I did work on establishing/tearing down an NBD connection as
necessary but didn't quite get it finished and have never released it).
That said, this bit can be torn out by simply removing a file and the
Makefile line.

Nigel

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