From: Christoph Hellwig <hch@lst.de>
To: Keith Busch <kbusch@kernel.org>
Cc: Christoph Hellwig <hch@lst.de>,
linux-nvme@lists.infradead.org, sagi@grimberg.me,
Rafael Wysocki <rafael.j.wysocki@intel.com>,
Vidya Sagar <vidyas@nvidia.com>
Subject: Re: [PATCH] nvme/pci: default to simple suspend
Date: Tue, 8 Feb 2022 15:37:51 +0100 [thread overview]
Message-ID: <20220208143751.GA25260@lst.de> (raw)
In-Reply-To: <20220207160655.GB635727@dhcp-10-100-145-180.wdc.com>
On Mon, Feb 07, 2022 at 08:06:55AM -0800, Keith Busch wrote:
> > I'd really prefer to sort this out at the platform level. We can't work
> > around broken platforms in nvme forever.
>
> I agree, but I'm not sure how to get everyone aligned.
>
> How about this to resolve the regressions: if the platform doesn't
> provide StorageD3Enable property, can we just default to the simple
> shutdown method? We'd only use the nvme power management capabilities if
> the platform explicity says it doesn't want D3, making the default the
> same as the legacy behavior.
I don't think this will work, as most older platforms just won't have
that attribute at all, and non-ACPI platforms most certainly won't have
it. We'll need more quirks in the core PCI/PM code like we did for the
AMD mobile platforms.
next prev parent reply other threads:[~2022-02-08 14:38 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-01 16:50 [PATCH] nvme/pci: default to simple suspend Keith Busch
2022-02-01 17:49 ` Vidya Sagar
2022-02-02 7:55 ` Christoph Hellwig
2022-02-02 16:03 ` Keith Busch
2022-02-04 7:10 ` Christoph Hellwig
2022-02-07 16:06 ` Keith Busch
2022-02-08 14:37 ` Christoph Hellwig [this message]
2022-02-08 17:14 ` Keith Busch
2022-02-09 7:48 ` Christoph Hellwig
2022-04-11 13:58 ` Manivannan Sadhasivam
2022-04-23 5:49 ` Christoph Hellwig
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