From: Christoph Hellwig <hch@lst.de>
To: "David E. Box" <david.e.box@linux.intel.com>
Cc: Christoph Hellwig <hch@lst.de>,
rjw@rjwysocki.net, lenb@kernel.org, bhelgaas@google.com,
kbusch@kernel.org, axboe@fb.com, sagi@grimberg.me,
linux-acpi@vger.kernel.org, linux-pci@vger.kernel.org,
linux-nvme@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/2] Add support for StorageD3Enable _DSD property
Date: Tue, 28 Apr 2020 16:22:47 +0200 [thread overview]
Message-ID: <20200428142247.GB5439@lst.de> (raw)
In-Reply-To: <de052d30cc881ac67f9410b50b0760ee5bf9a623.camel@linux.intel.com>
On Tue, Apr 28, 2020 at 07:09:59AM -0700, David E. Box wrote:
> > I'm not sure who came up with the idea to put this into ACPI, but it
> > belongs into NVMe. Please talk to the NVMe technical working group
> > instead of trying to overrules them in an unrelated group that
> > doesn't
> > apply to all of PCIe.
>
> Agreed that this is not ideal since it does not apply to all of PCIe.
> But as the property already exists on shipping systems, we need to be
> able to read it in the NVMe driver and the patch is consitent with the
> way properties under PCI ports are read.
The point is that it is not the BIOSes job do decide how Linux does
power management. For example D3 has really horrible entry and exit
latencies in many cases, and will lead to higher power usage.
next prev parent reply other threads:[~2020-04-28 14:22 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-28 0:32 [PATCH 0/2] Add support for StorageD3Enable _DSD property David E. Box
2020-04-28 0:32 ` [PATCH 1/2] pci: Add ACPI StorageD3Enable _DSD support David E. Box
2020-05-18 12:34 ` Rafael J. Wysocki
2020-05-19 17:10 ` David E. Box
2020-04-28 0:32 ` [PATCH 2/2] drivers/nvme: Add support for ACPI StorageD3Enable property David E. Box
2020-04-28 5:13 ` [PATCH 0/2] Add support for StorageD3Enable _DSD property Christoph Hellwig
2020-04-28 14:09 ` David E. Box
2020-04-28 14:22 ` Christoph Hellwig [this message]
2020-04-28 15:27 ` David E. Box
2020-04-29 5:20 ` Williams, Dan J
2020-04-29 15:10 ` Keith Busch
2020-04-29 16:11 ` David E. Box
2020-05-01 13:12 ` hch
2020-05-01 15:54 ` David E. Box
2020-05-01 13:10 ` hch
2020-05-18 13:51 ` David Woodhouse
2020-05-18 17:20 ` Dan Williams
2020-06-12 20:48 ` [PATCH V2 0/2] nvme: Add support for ACPI StorageD3Enable property David E. Box
2020-06-24 18:55 ` David E. Box
2020-06-24 19:10 ` Dan Williams
2020-06-24 19:39 ` David E. Box
2020-06-12 20:48 ` [PATCH V2 1/2] PCI: Add ACPI StorageD3Enable _DSD support David E. Box
2020-06-24 21:15 ` Bjorn Helgaas
2020-06-25 11:30 ` Rafael J. Wysocki
2020-06-25 12:16 ` Mika Westerberg
2020-06-25 17:07 ` David E. Box
2020-06-25 17:30 ` Bjorn Helgaas
2020-06-24 21:37 ` Bjorn Helgaas
2020-06-24 22:09 ` David E. Box
2020-06-12 20:48 ` [PATCH V2 2/2] drivers/nvme: Add support for ACPI StorageD3Enable property David E. Box
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