linux-kernel - RE: [PATCH 0/2] PM / sleep: Support for using suspend-to-idle by default

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Date:   Thu, 17 Nov 2016 20:40:46 +0000
From:   <Mario.Limonciello@...l.com>
To:     <rjw@...ysocki.net>, <linux-pm@...r.kernel.org>
CC:     <linux-acpi@...r.kernel.org>, <len.brown@...el.com>,
        <linux-kernel@...r.kernel.org>, <luto@...nel.org>
Subject: RE: [PATCH 0/2] PM / sleep: Support for using suspend-to-idle by
 default

Hi Rafael,

> -----Original Message-----
> From: Rafael J. Wysocki [mailto:rjw@...ysocki.net]
> Sent: Wednesday, November 16, 2016 8:19 PM
> To: Linux PM list <linux-pm@...r.kernel.org>
> Cc: ACPI Devel Maling List <linux-acpi@...r.kernel.org>; Len Brown
> <len.brown@...el.com>; Linux Kernel Mailing List <linux-
> kernel@...r.kernel.org>; Limonciello, Mario
> <Mario_Limonciello@...l.com>; Andy Lutomirski <luto@...nel.org>
> Subject: [PATCH 0/2] PM / sleep: Support for using suspend-to-idle by
> default
> 
> Hi,
> 
> This series is a follow-up for a BoF discussion during the LPC.
> 
> The discussion was about supporting Linux on modern laptops and one of
> the issues mentioned was the lack of support for suspend-to-idle in user
> space and if there's anything that can be done about that in the kernel.
> 
> The following patches are my input. :-)
> 
> The first one reworks the suspend interface to allow the "mem" string
> in /sys/power/state to represent multiple things that can be selected via
> an additional sysfs attribute.
> 
> The second one makes ACPI select suspend-to-idle as the default suspend
> mode
> if so indicated in the FADT.
> 
> Please let me know what you think.
> 
> Thanks,
> Rafael

Thanks for submitting.  I like the approach, especially that it leaves room
to easily modify the behavior for debugging purposes and adding quirks.

I tested your series on a machine that had this bit set in the FADT and
confirmed that it set up and used policy properly.

Tested-By: Mario Limonciello <mario.limonciello@...l.com>