From: Tejun Heo <tj@kernel.org>
To: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: linux-block@vger.kernel.org, Jens Axboe <axboe@kernel.dk>,
James Bottomley <James.Bottomley@HansenPartnership.com>,
"Martin K . Petersen" <martin.petersen@oracle.com>,
linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org,
linux-scsi@vger.kernel.org
Subject: Re: [PATCH 0/7] Runtime PM support for AHCI host controller driver
Date: Fri, 19 Feb 2016 10:54:11 -0500 [thread overview]
Message-ID: <20160219155411.GI13177@mtj.duckdns.org> (raw)
In-Reply-To: <1455785657-22924-1-git-send-email-mika.westerberg@linux.intel.com>
On Thu, Feb 18, 2016 at 10:54:10AM +0200, Mika Westerberg wrote:
> Linux already supports runtime PM of disks (drivers/scsi/sd.c) so that
> after certain amount of idle time the disk is suspended automatically. This
> series extends the support to AHCI host controllers. Whenever SATA ports
> are determined to be idle (all children are runtime suspended) the host
> controller is also suspended.
>
> On recent Intel CPUs like Broxton this allows the CPU to go low power idle
> states like S0ix runtime (given that all necessary blocks are also in their
> correesponding low power states).
>
> Patches [1-2/7] fix a lockup where disk is runtime suspended and the system
> is put to sleep. They are independent of the rest of the series.
>
> Patch [3/7] makes it possible for SATA ports to be runtime suspended when
> there is not disk connected. For example on Lenovo Yoga 900 there are two
> SATA ports which only one of them has disk connected. This patch allows the
> host controller to runtime suspend whenever the disk is idle.
Applied to libata/for-4.6.
Thanks.
--
tejun
prev parent reply other threads:[~2016-02-19 15:54 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-18 8:54 [PATCH 0/7] Runtime PM support for AHCI host controller driver Mika Westerberg
2016-02-18 8:54 ` [PATCH 1/7] block: Add blk_set_runtime_active() Mika Westerberg
2016-02-18 8:54 ` [PATCH 2/7] scsi: Set request queue runtime PM status back to active on resume Mika Westerberg
2016-02-18 8:54 ` [PATCH 3/7] scsi: Drop runtime PM usage count after host is added Mika Westerberg
2016-02-18 22:50 ` Julian Calaby
2016-02-19 8:18 ` Mika Westerberg
2016-02-18 8:54 ` [PATCH 4/7] ahci: Cache host controller version Mika Westerberg
2016-02-18 8:54 ` [PATCH 5/7] ahci: Convert driver to use modern PM hooks Mika Westerberg
2016-02-18 10:45 ` Andy Shevchenko
2016-02-18 13:12 ` Tejun Heo
2016-02-18 14:41 ` Christoph Hellwig
2016-02-18 8:54 ` [PATCH 6/7] ahci: Add functions to manage runtime PM of AHCI ports Mika Westerberg
2016-02-18 8:54 ` [PATCH 7/7] ahci: Add runtime PM support for the host controller Mika Westerberg
2016-02-18 16:40 ` [PATCH 0/7] Runtime PM support for AHCI host controller driver Tejun Heo
2016-02-19 8:39 ` Mika Westerberg
2016-02-19 15:12 ` Jens Axboe
2016-02-19 15:54 ` Tejun Heo [this message]
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=20160219155411.GI13177@mtj.duckdns.org \
--to=tj@kernel.org \
--cc=James.Bottomley@HansenPartnership.com \
--cc=axboe@kernel.dk \
--cc=linux-block@vger.kernel.org \
--cc=linux-ide@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-scsi@vger.kernel.org \
--cc=martin.petersen@oracle.com \
--cc=mika.westerberg@linux.intel.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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).