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

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Message-ID: <20070426210631.GD24852@thunk.org>
Date:	Thu, 26 Apr 2007 17:06:31 -0400
From:	Theodore Tso <tytso@....edu>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Pavel Machek <pavel@....cz>,
	Johannes Berg <johannes@...solutions.net>,
	Nick Piggin <npiggin@...e.de>, Mike Galbraith <efault@....de>,
	linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
	Con Kolivas <kernel@...ivas.org>,
	suspend2-devel@...ts.suspend2.net, Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Arjan van de Ven <arjan@...radead.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>
Subject: Re: suspend2 merge (was Re: [Suspend2-devel] Re: CFS and suspend2: hang in atomic copy)

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.

					- Ted

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