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

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Message-ID: <alpine.LFD.0.98.0705240815530.26602@woody.linux-foundation.org>
Date:	Thu, 24 May 2007 08:28:54 -0700 (PDT)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Romano Giannetti <romanol@...omillas.es>
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: Re: Long delay in resume from RAM (Was Re: [patch 00/69]
 -stablereview)



On Thu, 24 May 2007, Romano Giannetti wrote:
> 
> 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.

Ok. That was probably true even before you added the suspend ordering 
patch.

> 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?

Can you compile those two modules with PCMCIA_DEBUG=4?

Something like

	make EXTRA_CFLAGS=-DPCMCIA_DEBUG=4

should do it. You might also enable CONFIG_PCMCIA_DEBUG while you're at 
it. And then the extra debugging output hopefully will narrow down where 
things go south.

		Linus
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