linux-kernel - Re: broken suspend [Was: 2.6.24-rc2-mm1]

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Date:	Sun, 18 Nov 2007 12:07:37 -0500 (EST)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Jiri Slaby <jirislaby@...il.com>
cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Greg KH <greg@...ah.com>,
	Kernel development list <linux-kernel@...r.kernel.org>,
	Linux-pm mailing list <linux-pm@...ts.linux-foundation.org>
Subject: Re: broken suspend [Was: 2.6.24-rc2-mm1]

On Sun, 18 Nov 2007, Jiri Slaby wrote:

> On 11/18/2007 04:23 PM, RafaÅ J. Wysocki wrote:
> > On Sunday, 18 of November 2007, Jiri Slaby wrote:
> >> On 11/18/2007 04:03 PM, Rafael J. Wysocki wrote:
> >>> Can you also make the new System-map available, please?
> >> Sure:
> >> http://www.fi.muni.cz/~xslaby/sklad/System.map1
> > 
> > The last notifier called in http://www.fi.muni.cz/~xslaby/sklad/susp_hang2.png
> 
> Last... Note, that it's only first 20 invokations of notifiers, there are
> bazillion of them when I remove the condition '< 20'.
> 
> > is apparently cpu_swap_callback() which is not called in
> > http://www.fi.muni.cz/~xslaby/sklad/susp_hang1.png .
> > 
> > Can you verify that cpu_swap_callback() gets called if the patch is not
> > applied?
> 
> Does this still apply?

You'll get more useful results if you redo your changes to 
notifier_call_chain().  Have it print out the address of the routine 
_before_ making the call, and don't limit it to 20.  That way you'll 
know exactly which notifier routine ends up hanging.

Alan Stern

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