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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20220202075502.GA18474@lst.de \
--to=hch@lst.de \
--cc=kbusch@kernel.org \
--cc=linux-nvme@lists.infradead.org \
--cc=rafael.j.wysocki@intel.com \
--cc=sagi@grimberg.me \
--cc=vidyas@nvidia.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.