linux-kernel - Re: Async suspend-resume patch w/ completions (was: Re: Async suspend-resume patch w/ rwsems)

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Message-ID: <alpine.LFD.2.00.0912141609020.14385@localhost.localdomain>
Date:	Mon, 14 Dec 2009 16:10:11 -0800 (PST)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
cc:	Alan Stern <stern@...land.harvard.edu>,
	Zhang Rui <rui.zhang@...el.com>,
	LKML <linux-kernel@...r.kernel.org>,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	pm list <linux-pm@...ts.linux-foundation.org>
Subject: Re: Async suspend-resume patch w/ completions (was: Re: Async
 suspend-resume patch w/ rwsems)



On Tue, 15 Dec 2009, Rafael J. Wysocki wrote:
> 
> Because the PCI bridges are not the only case where it matters (I'd say they
> are really a corner case).  Basically, any two async devices separeted by a
> series of sync ones are likely not to be suspended (or resumed) in parallel
> with each other, because the parent is usually next to its children in dpm_list.

Give a real example that matters.

Really. 

How hard can it be to understand: KISS. Keep It Simple, Stupid.

I get really tired of this whole stupid async discussion, because you're 
overdesigning it.

To a first approximation, THE ONLY THING THAT MATTERS IS USB.

		Linus
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