linux-kernel - Re: pcmcia resume 60 second hang. Re: [patch 00/69] -stable review

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Date:	Fri, 25 May 2007 15:18:46 +1000
From:	Nigel Cunningham <nigel@...el.suspend2.net>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Pavel Machek <pavel@....cz>,
	Romano Giannetti <romanol@...omillas.es>,
	Chris Wright <chrisw@...s-sol.org>,
	Chuck Ebbert <cebbert@...hat.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	stable@...nel.org, Justin Forbes <jmforbes@...uxtx.org>,
	Zwane Mwaikambo <zwane@....linux.org.uk>,
	Theodore Ts'o <tytso@....edu>,
	Randy Dunlap <rdunlap@...otime.net>,
	Dave Jones <davej@...hat.com>,
	Chuck Wolber <chuckw@...ntumlinux.com>,
	Chris Wedgwood <reviews@...cw.f00f.org>,
	Michael Krufky <mkrufky@...uxtv.org>,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	"Rafael J. Wysocki" <rjw@...k.pl>
Subject: Re: pcmcia resume 60 second hang. Re: [patch 00/69] -stable review

Hi.

On Thu, 2007-05-24 at 21:49 -0700, Linus Torvalds wrote:
> 
> On Fri, 25 May 2007, Nigel Cunningham wrote:
> > 
> > Does that mean you never ever power off your laptop (assuming you have
> > one), and the battery never runs out? Surely you must power it off
> > completely sometimes?
> 
> So? The bootup isn't that much worse than a disk suspend/resume, and it's 
> reliable.
> 
> And actually, I don't use laptops much. I use mostly desktops, and STR 
> works fine on at least some of them. In contrast, doing some 
> suspend-to-disk thing would just be insane and idiotic. If I have to wait 
> for half a minute and have a slow system even after that because my git 
> trees aren't in the cache, I really might as well just shut them off.
> 
> In contrast, STR means they are quiet and don't waste energy when I don't 
> use them, but they're instantly available when I care. HUGE difference.
> 
> I really think suspend-to-disk is just a total waste of my time.

Ah. That's because you're using [u]swsusp. If you used Suspend2, your
git trees would be in the cache, your system wouldn't be slow and you'd
still be back up in that half a minute or so - probably less time. Give
it a try for a week, and then go back to rebooting. After that, tell me
rebooting is better and I've wasted the last 5 or 6 years improving the
code.

Regards,

Nigel

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