linux-kernel - Re: Suspend-resume failure on Intel Eagle Lake Core2Duo

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Message-ID: <alpine.DEB.2.20.1707311026170.2314@nanos>
Date:   Mon, 31 Jul 2017 10:29:23 +0200 (CEST)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Tomi Sarvela <tomi.p.sarvela@...el.com>
cc:     Martin Peres <martin.peres@...ux.intel.com>,
        jeffy.chen@...k-chips.com, linux-kernel@...r.kernel.org
Subject: Re: Suspend-resume failure on Intel Eagle Lake Core2Duo

On Mon, 31 Jul 2017, Tomi Sarvela wrote:
> On 31/07/17 10:45, Thomas Gleixner wrote:
> > On Mon, 31 Jul 2017, Tomi Sarvela wrote:
> > > On 28/07/17 19:26, Thomas Gleixner wrote:
> > > > Did you change anything else compared to the tests before ?
> > > 
> > > I did check that the problem persisted in linus-HEAD before testing your
> > > patch. The testing was done in order (reading from console logs I happen
> > > to
> > > still have in one window):
> > 
> > What I still do not understand is why this would affect the suspend path in
> > any way.
> > 
> > Can you remove the previous patch and apply the one below. If it resumes,
> > please provide the data from the trace buffer again.
> 
> No such luck. ELK hangs in the suspend-test with earlier patch removed, this
> added. Checked again that the power-led is on, no serial output.
> 
> Tree not pulled: still testing against the previous head -rc2, not current
> 4.13.0-rc3

Shouldn't make a difference. Can you please try the following:

Offline CPU1 before invoking suspend.

# echo 0 >/sys/devices/system/cpus/cpu1/offline

Thanks,

	tglx