linux-kernel - Long delay in resume from RAM (Was Re: [patch 00/69] -stablereview)

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Date:	Thu, 24 May 2007 17:06:41 +0200
From:	Romano Giannetti <romanol@...omillas.es>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Chris Wright <chrisw@...s-sol.org>,
	Chuck Ebbert <cebbert@...hat.com>,
	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
Subject: Long delay in resume from RAM (Was Re: [patch 00/69] -stablereview)

(Changing subject to something more informative. You are lost,
original thread is at http://lkml.org/lkml/2007/5/23/38 )

On Thu, 2007-05-24 at 14:06 +0200, Romano Giannetti wrote:
> On Tue, 2007-05-22 at 15:07 -0700, Linus Torvalds wrote:
> >
> > On Tue, 22 May 2007, Romano Giannetti wrote:
> > >
>
> > It's not known, no, and yeah, that's scary (and 60 seconds is long enough
> > that most people would have grown bored and pushed the power button for
> > five seconds, having considered the resume a failure).
> >
> > > [    1.617972] pcmcia: registering new device pcmcia1.0
> > > [   61.612517] PM: Writing back config space on device 0000:00:[...]
> > >

More data. I compiled 2.6.21.2 + the patch "Fix ACPI suspend / device
suspend ordering problem  (52ade9b3b97fd3bea42842a056fe0786c28d0555)

and I discovered that if I do not put the 3Com 3CXEM556B card into the
pcmcia slot, the suspend/resume (and the snapshot/restore) works ok,
without delay at all. It continues to work even with a cardbus wifi in
the slot, so my conclusions are that the probable culprit is restricted
to:

      *  a race when loading the .cis file from userspace
      * the serial_cs or 3c589_cs driver (only when the device is in;
        they are loaded still now and all is working ok)

...what now?
	Romano





--
Romano Giannetti --- romano.giannetti@...il.com
Sorry for the following disclaimer, it's attached by our otugoing server
and I cannot shut it up.



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