From: hch@infradead.org (Christoph Hellwig)
Subject: NVMe APST high latency power states being skipped
Date: Tue, 6 Jun 2017 02:54:54 -0700 [thread overview]
Message-ID: <20170606095454.GA13569@infradead.org> (raw)
In-Reply-To: <20170602071337.GA11447@infradead.org>
On Fri, Jun 02, 2017@12:13:37AM -0700, Christoph Hellwig wrote:
> > Maybe add an extra knob which can directly control deepest allow power
> > state? Userspace tools can control deepest power state through this
> > knob.
>
> I'd prefer that things work out of the box. I'd be tempted to just
> bump up the latency requirement to cover the device, but if Andy
> doesn't like that in general we could add a quirk for this device
> to at least allow it to use deep power states.
Kai, can you send the patch to bump default_ps_max_latency_us to
reasonably high value that all the devices you are testing are
able to use PS3/4?
next prev parent reply other threads:[~2017-06-06 9:54 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-22 9:04 NVMe APST high latency power states being skipped Kai-Heng Feng
2017-05-23 7:17 ` Christoph Hellwig
2017-05-23 8:06 ` Kai-Heng Feng
2017-05-23 9:42 ` Christoph Hellwig
2017-05-23 19:35 ` Andy Lutomirski
2017-05-23 19:56 ` Mario.Limonciello
2017-05-23 20:01 ` Andy Lutomirski
2017-05-23 20:19 ` Mario.Limonciello
2017-05-23 21:11 ` Andy Lutomirski
2017-05-23 22:09 ` Mario.Limonciello
2017-05-24 4:53 ` Kai-Heng Feng
2017-05-24 5:31 ` Andy Lutomirski
2017-05-25 8:21 ` Kai-Heng Feng
2017-05-26 9:25 ` Christoph Hellwig
2017-06-01 8:19 ` Kai-Heng Feng
2017-06-01 11:32 ` Christoph Hellwig
2017-06-02 7:08 ` Kai-Heng Feng
2017-06-02 7:13 ` Christoph Hellwig
2017-06-06 9:54 ` Christoph Hellwig [this message]
2017-06-06 15:57 ` Andy Lutomirski
2017-06-07 6:19 ` Kai-Heng Feng
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