linux-kernel - Re: When will the lunacy end? (Was Re: [PATCH] uswsusp: add pmops->{prepare,enter,finish} support (aka "platform mode"))

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Message-Id: <1159291778.9652.23.camel@chalcedony.pathscale.com>
Date:	Tue, 26 Sep 2006 10:29:38 -0700
From:	Bryan O'Sullivan <bos@...pentine.com>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	Pavel Machek <pavel@....cz>, Andrew Morton <akpm@...l.org>,
	Nigel Cunningham <ncunningham@...uxmail.org>,
	Stefan Seyfried <seife@...e.de>, linux-kernel@...r.kernel.org,
	"Rafael J. Wysocki" <rjw@...k.pl>
Subject: Re: When will the lunacy end? (Was Re: [PATCH] uswsusp: add
	pmops->{prepare,enter,finish} support (aka "platform mode"))

On Tue, 2006-09-26 at 18:44 +0100, Alan Cox wrote:
> Ar Maw, 2006-09-26 am 09:45 -0700, ysgrifennodd Bryan O'Sullivan:
> > 16 seconds doing things to devices
> 
> Flushing the cache of a busy disk is 7 seconds a disk just to begin
> with.

This is an idle machine whose only activity is to have woken up from an
earlier swsusp.  If I scribble on the disk a lot, it increases the
amount of time that swsusp takes, but only by a handful of seconds
(about the 7 you indicate, depending on the amount of dirty data).

	<b

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