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Date: Tue, 10 Dec 2019 00:03:18 +0100
From: "Rafael J. Wysocki" <rafael@...nel.org>
To: Todd Brandt <todd.e.brandt@...ux.intel.com>
Cc: Zhang Rui <rui.zhang@...el.com>,
"Rafael J. Wysocki" <rjw@...ysocki.net>,
Linux ACPI <linux-acpi@...r.kernel.org>,
LKML <linux-kernel@...r.kernel.org>,
Linux PM <linux-pm@...r.kernel.org>,
"Brandt, Todd E" <todd.e.brandt@...el.com>
Subject: Re: [PATCH] ACPI: PM: Avoid attaching ACPI PM domain to certain devices
On Mon, Dec 9, 2019 at 11:49 PM Todd Brandt
<todd.e.brandt@...ux.intel.com> wrote:
>
> On Thu, 2019-12-05 at 09:32 -0800, Todd Brandt wrote:
> > On Wed, 2019-12-04 at 22:04 +0800, Zhang Rui wrote:
> > > On Wed, 2019-12-04 at 02:54 +0100, Rafael J. Wysocki wrote:
> > > > From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> > > >
> > > > Certain ACPI-enumerated devices represented as platform devices
> > > > in
> > > > Linux, like fans, require special low-level power management
> > > > handling
> > > > implemented by their drivers that is not in agreement with the
> > > > ACPI
> > > > PM domain behavior. That leads to problems with managing ACPI
> > > > fans
> > > > during system-wide suspend and resume.
> > > >
> > > > For this reason, make acpi_dev_pm_attach() skip the affected
> > > > devices
> > > > by adding a list of device IDs to avoid to it and putting the IDs
> > > > of
> > > > the affected devices into that list.
> > > >
> > > > Fixes: e5cc8ef31267 (ACPI / PM: Provide ACPI PM callback routines
> > > > for
> > > > subsystems)
> > > > Reported-by: Zhang Rui <rui.zhang@...el.com>
> > > > Cc: 3.10+ <stable@...r.kernel.org> # 3.10+
> > > > Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> > > > ---
> > > >
> > > > Rui,
> > > >
> > > > Please test this on the machine(s) affected by the fan
> > > > suspend/resume
> > > > issues.
> > >
> > > Sure, Todd and I will re-run stress test with this patch applied
> > > when
> > > 5.5-rc1 released.
> >
> > I've applied it 5.4.0 and will do a full stress test run this weekend
> > in the lab (where 7 out of 20 machines have this issue). The kernel
> > will be called "5.4.0-acpifanfix", and the data should be ready
> > Sunday
> > Dec 8.
> >
> > This is the issue I'll test for:
> > https://bugzilla.kernel.org/show_bug.cgi?id=204321
> >
>
> The test data is in and I'm very happy to report that the patch works
> extremely well. Here's the data gathered on the bugzilla issue 204321:
> ACPI fan resume is too long.
>
> [With the patch]
>
> Kernel Host Test Run Count Rate
> 5.4.0-acpifanfix otcpl-whl-u-clear mem-x2351 1 0.04%
> 5.4.0-acpifanfix otcpl-z170x-ud5 mem-x2369 0 0%
> 5.4.0-acpifanfix otcpl-z170x-ud5 freeze-x2492 0 0%
> 5.4.0-acpifanfix otcpl-whl-u-clear freeze-x2411 0 0%
> 5.4.0-acpifanfix otcpl-whl-u mem-x2289 0 0%
> 5.4.0-acpifanfix otcpl-whl-u freeze-x2389 0 0%
> 5.4.0-acpifanfix otcpl-icl-u-2 mem-x2273 0 0%
> 5.4.0-acpifanfix otcpl-icl-u-2 freeze-x817 0 0%
> 5.4.0-acpifanfix otcpl-glk-rvp-1 freeze-x122 0 0%
> 5.4.0-acpifanfix otcpl-dell-p5510-xeon-1 mem-x1851 0 0%
> 5.4.0-acpifanfix otcpl-dell-p5510-xeon-1 freeze-x1994 0 0%
> 5.4.0-acpifanfix otcpl-dell-inspiron-3493 mem-x1722 0 0%
> 5.4.0-acpifanfix otcpl-dell-inspiron-3493 freeze-x2102 0 0%
> 5.4.0-acpifanfix otcpl-cfl-u-01 mem-x39 0 0%
> 5.4.0-acpifanfix otcpl-cfl-u-01 freeze-x2091 0 0%
> 5.4.0-acpifanfix otcpl-cfl-h mem-x415 0 0%
> 5.4.0-acpifanfix otcpl-cfl-h freeze-x2265 0 0%
> 5.4.0-acpifanfix otcpl-aml-y mem-x3126 0 0%
> 5.4.0-acpifanfix otcpl-aml-y freeze-x2288 0 0%
>
> [Without the patch]
>
> Kernel Host Test Run Count Rate
> 5.3.0+ otcpl-icl-u-2 mem-x2571 2571 100.00%
> 5.3.0+ otcpl-whl-u mem-x2497 2497 100.00%
> 5.3.0+ otcpl-cfl-h mem-x2068 2068 100.00%
> 5.3.0+ otcpl-glk-rvp-1 mem-x75 74 98.67%
> 5.3.0+ otcpl-cfl-u-01 mem-x1074 1050 97.77%
> 5.3.0+ otcpl-glk-rvp-1 freeze-x45 12 26.67%
> 5.3.0+ otcpl-whl-u freeze-x2649 428 16.16%
> 5.3.0+ otcpl-aml-y freeze-x2434 373 15.32%
> 5.3.0+ otcpl-cfl-u-01 freeze-x2419 123 5.08%
> 5.3.0+ otcpl-latexo-ivb-cpt freeze-x1914 97 5.07%
> 5.3.0+ otcpl-whl-u-clear mem-x2640 69 2.61%
> 5.3.0+ otcpl-icl-u-2 freeze-x2757 59 2.14%
> 5.3.0+ otcpl-whl-u-clear freeze-x2830 53 1.87%
> 5.3.0+ otcpl-tgl-rvp freeze-x2086 20 0.96%
> 5.3.0+ otcpl-cfl-h freeze-x2457 8 0.33%
> 5.3.0+ otcpl-latexo-ivb-cpt mem-x2000 4 0.20%
> 5.3.0+ otcpl-aml-y mem-x2727 2 0.07%
> 5.3.0+ otcpl-z170x-ud5 mem-x2669 0 0%
> 5.3.0+ otcpl-z170x-ud5 freeze-x2881 0 0%
> 5.3.0+ otcpl-lenovo-ideapad-130 mem-x2000 0 0%
> 5.3.0+ otcpl-lenovo-ideapad-130 freeze-x2000 0 0%
> 5.3.0+ otcpl-dell-p5510-xeon-2 mem-x570 0 0%
> 5.3.0+ otcpl-dell-p5510-xeon-2 freeze-x1093 0 0%
> 5.3.0+ otcpl-dell-p5510-xeon-1 mem-x2209 0 0%
> 5.3.0+ otcpl-dell-p5510-xeon-1 freeze-x2431 0 0%
> 5.3.0+ otcpl-dell-inspiron-3493 freeze-x1170 0 0%
> 5.3.0+ otcpl-chromebook-hsw freeze-x1305 0 0%
> 5.3.0+ otcpl-chromebook-hsw freeze-x368 0 0%
Great, thanks for the verification!
I will queue up the patch for the next ACPI pull request, then.
Thanks!
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