linux-kernel - Re: [linux-pm] intermittent suspend problem again

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Message-Id: <200910302138.37938.rjw@sisk.pl>
Date:	Fri, 30 Oct 2009 21:38:37 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Ferenc Wagner <wferi@...f.hu>
Cc:	linux-pm@...ts.linux-foundation.org,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	yakui.zhao@...el.com, LKML <linux-kernel@...r.kernel.org>,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	Len Brown <lenb@...nel.org>
Subject: Re: [linux-pm] intermittent suspend problem again

On Friday 30 October 2009, Ferenc Wagner wrote:
> "Rafael J. Wysocki" <rjw@...k.pl> writes:
> 
> > On Thursday 29 October 2009, Ferenc Wagner wrote:
> >
> >> "Rafael J. Wysocki" <rjw@...k.pl> writes:
> >> 
> >>> Which part of it is getting slower?  Saving the image, suspending
> >>> devices or the entire hibernation overall?
> >> 
> >> "Snapshotting system" before saving the image
> >
> > That may be a result of changing the way in which image memory is reserved.
> > How much memory is there in your machine?
> 
> 512 MB.

So it's likely the slowdown results from the memory management rework.
Hopefully, it'll improve in the future.

> >> and saving the image as well.  If s2disk didn't report funny huge negative
> >> ratios all the time,
> >
> > Hmm.  This looks like a bug in s2disk.
> 
> Definitely.  Do you also experience this?

Not really, but I use newer versions.

> Probably an easy one, but I've never had the chance to check the CVS version
> (running 0.7 at the moment).  I can probably give 0.8 a spin if you deem
> necessary.  I always thought it wasn't more than a cosmetic flaw.

It probably is.  You can try the current version from my git tree at:
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-utils.git

Thanks,
Rafael
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