Date: Sun, 10 Dec 2017 21:30:50 +0100
From: Michal Hocko <mhocko@kernel.org>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>,
        Andy Lutomirski <luto@kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        the arch/x86 maintainers <x86@kernel.org>
Subject: Re: Linux 4.15-rc2: Regression in resume from ACPI S3
Message-ID: <20171210203050.GF20234@dhcp22.suse.cz>
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On Thu 07-12-17 08:55:08, Michal Hocko wrote:
> On Wed 06-12-17 13:14:52, Michal Hocko wrote:
> > On Mon 04-12-17 14:36:20, Linus Torvalds wrote:
> > > On Mon, Dec 4, 2017 at 2:25 PM, Rafael J. Wysocki <rjw@rjwysocki.net> wrote:
> > > >
> > > > So far, resume from suspend-to-RAM (ACPI S3) is broken on all of the
> > > > systems I have tested, so it is probably safe to assume it to be
> > > > broken everywhere.
> > > 
> > > Oh, it's definitely not broken everywhere, because I use it myself,
> > > and was traveling last week due to my mom's bday.
> > > 
> > > HOWEVER.
> > > 
> > > Some of the x86 work seems to have broken it for some configurations.
> > > In particular, do you have a big "everything enabled" kernel config -
> > > particularly lockdep and irqflags tracing enabled?
> > > 
> > > Andy has a patch, but it hasn't made it to me yet (probably because
> > > the x86 people are very busy with the kaiser work):
> > > 
> > >     https://lkml.org/lkml/2017/11/30/546
> > > 
> > > (also note his follow-up "fix the commit message" note, but that one
> > > doesn't actually affect the code itself).
> > 
> > merging tip/x86/urgent on top of your tree fixed this problem for me,
> > but I am seeing something else
> > [  131.711412] ACPI: Preparing to enter system sleep state S3
> > [  131.755328] ACPI: EC: event blocked
> > [  131.755328] ACPI: EC: EC stopped
> > [  131.755328] PM: Saving platform NVS memory
> > [  131.755344] Disabling non-boot CPUs ...
> > [  131.779330] IRQ 124: no longer affine to CPU1
> > [  131.780334] smpboot: CPU 1 is now offline
> > [  131.804465] smpboot: CPU 2 is now offline
> > [  131.827291] IRQ 122: no longer affine to CPU3
> > [  131.827292] IRQ 123: no longer affine to CPU3
> > [  131.828293] smpboot: CPU 3 is now offline
> > [  131.830991] ACPI: Low-level resume complete
> > [  131.831092] ACPI: EC: EC started
> > [  131.831093] PM: Restoring platform NVS memory
> > [  131.831864] do_IRQ: 0.55 No irq handler for vector
> > [  131.831884] Enabling non-boot CPUs ...
> > [  131.831909] x86: Booting SMP configuration:
> > [  131.831910] smpboot: Booting Node 0 Processor 1 APIC 0x2
> > [  131.832913]  cache: parent cpu1 should not be sleeping
> > [  131.833058] CPU1 is up
> > [  131.833067] smpboot: Booting Node 0 Processor 2 APIC 0x1
> > [  131.833864]  cache: parent cpu2 should not be sleeping
> > [  131.833983] CPU2 is up
> > [  131.833995] smpboot: Booting Node 0 Processor 3 APIC 0x3
> > [  131.834776]  cache: parent cpu3 should not be sleeping
> > [  131.834923] CPU3 is up
> > 
> > "No irq handler" part looks a bit scary (maybe related to lost affinity
> > messages?) but the following messages look quite as well. Is this
> > something known? The system seems to be up and running without any
> > visible issues.
> 
> Hmm, there is still something bad going on during resume. My laptop
> haven't woken up from s2ram this morning. The screen was powered on
> but the system hasn't come up.

It's been few days and I haven't seen this problem again. And I am doing
s2ram all the time...
-- 
Michal Hocko
SUSE Labs