From: Christoph Hellwig <hch@lst.de>
To: Keith Busch <kbusch@kernel.org>
Cc: linux-nvme@lists.infradead.org, hch@lst.de, 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: Wed, 2 Feb 2022 08:55:02 +0100 [thread overview]
Message-ID: <20220202075502.GA18474@lst.de> (raw)
In-Reply-To: <20220201165006.3074615-1-kbusch@kernel.org>
On Tue, Feb 01, 2022 at 08:50:06AM -0800, Keith Busch wrote:
> There is no complete set of attributes a driver can check to know if
> nvme power management is the correct thing to do in a runtime suspend
> situation. Every attempt so far to optimize idle power consumption and
> resume latency for a particular platform just leads to regressions
> elsewhere.
>
> Default to the simple shutdown since it is the historically safest
> option, and provide a user parameter to override it if the user knows
> it's safe to use for their platform.
Sigh. The platforms really should be asking for a explicit D3cold if
they need one..
next prev parent reply other threads:[~2022-02-02 7:55 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 [this message]
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
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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