On Thursday, January 09, 2014 9:04 AM, Phillip Susi wrote:
> I think my patch for this "libata: resume in the background" was a LOT
> simpler. It just used the existing behavior of becoming async when
> the async argument was !NULL, and fixed the one caller that didn't
> actually care about the re
Good suggestion on the reuse of the existing ata_port_request_pm function. I
have this habit of introducing new changes in such a way that they can be
easily turned on and off for testing, but that's not appropriate here. I'll
redo this patch with the functionality weaved into all the existing f
-
From: Oliver Neukum [mailto:oneu...@suse.de]
Sent: Saturday, August 24, 2013 1:21 AM
To: Brandt, Todd E
Cc: linux-...@vger.kernel.org; linux-scsi@vger.kernel.org; t...@kernel.org;
gre...@linuxfoundation.org; st...@rowland.harvard.edu
Subject: Re: [PATCH v3 2/2] Hard disk S3 resume time optimizati
This is v3 of the non-blocking S3 resume patch. It's been broken into
two pieces, this part is for the scsi subsystem. I've addressed Alan
Stern's comments in particular by reformatting the call to conform
to the proper style guidelines.
Note - the two patches will function separately but both ar
This is v3 of the non-blocking S3 resume patch. It's been broken into
two pieces, this part is for the ata subsystem. I've addressed Oliver
Neukum's comments in particular by removing any potential race
conditions.
In the previous version I used the ata_port_request_pm function to handle
the ca
_
From: Alan Stern [st...@rowland.harvard.edu]
Sent: Friday, August 09, 2013 11:06 AM
To: Brandt, Todd E
Cc: linux-...@vger.kernel.org; linux-scsi@vger.kernel.org; Oliver Neukum; Tejun
Heo; Greg Kroah-Hartman
Subject: Re: [PATCH v2] Hard disk S3 resume time optimization
Your email message
day, August 09, 2013 12:25 AM
To: Brandt, Todd E
Cc: linux-...@vger.kernel.org; linux-scsi@vger.kernel.org; Tejun Heo; Greg
Kroah-Hartman; Alan Stern
Subject: Re: [PATCH v2] Hard disk S3 resume time optimization
On Fri, 2013-08-09 at 01:09 +, Brandt, Todd E wrote:
> static struct ata_f
This patch essentially removes the disk spinup wait time from the system S3
resume delay. It can be a very significant improvement on systems with large
SATA disks which can take several seconds to spin up. On the systems I've
tested this patch reduces the resume time to around half a second (as
randt
Linux Kernel Developer OTC, Hillsboro OR
https://opensource.intel.com/linux-wiki/ToddBrandt
From: Oliver Neukum [oneu...@suse.de]
Sent: Friday, August 02, 2013 10:05 AM
To: Brandt, Todd E
Cc: linux-...@vger.kernel.org; linux-scsi@vger.kernel.org
S
From: linux-scsi-ow...@vger.kernel.org [linux-scsi-ow...@vger.kernel.org] on
behalf of Oliver Neukum [oneu...@suse.de]
Sent: Friday, August 02, 2013 5:42 AM
To: Brandt, Todd E
Cc: linux-...@vger.kernel.org; linux-scsi@vger.kernel.org
Subject: Re: [PATCH
This patch is a potential way to reduce the S3 resume time for SATA drives.
Essentially this patch removes the hard disk resume time from the total system
resume time, with the disks still taking as long to come back online but in the
background.
The major bottleneck is in the ata port resume w
o OR
https://opensource.intel.com/linux-wiki/ToddBrandt
From: Alan Stern [st...@rowland.harvard.edu]
Sent: Friday, May 17, 2013 12:44 PM
To: Brandt, Todd E
Cc: linux-...@vger.kernel.org; linux-scsi@vger.kernel.org;
linux...@vger.kernel.org; Jeff Garzik; Jens A
Hi, will do, thanks for the feedback. I used the goto to make the code addition
smaller, but I obviously sacrificed code clarity.
From: Greg Kroah-Hartman [gre...@linuxfoundation.org]
Sent: Friday, May 17, 2013 12:11 PM
To: Brandt, Todd E
Cc: linux
Updates the drivers/base/power subsystem to allow any devices which
have registred as asynchronous and who have not registered "complete"
callbacks to be non-blocking. i.e system resume can finish and return
control to the user while these devices continue resuming.
Changelog:
v2:
- Update
This patch goes through and sets the power.async_suspend flag for every device
in the ATA/SCSI resume path. This includes the ata port, link, and dev
devices, the scsi host and target devices, all their associated transport
devices, the block devices, and block partitions. This allows the entire
AT
The vast majority of time spent in S3 resume is consumed by the ATA
subsystem as it resumes the computer's hard drives. For large hard disks
this time can be upwards of 10 seconds, which makes S3 suspend/resume too
costly to use frequently. This time needs to be reduced.
More details here:
https:
Hello, my name's Todd Brandt and I'm the project owner for Intel Open Source
Technology Center's new project to optimize suspend/resume time.
Our website is: https://01.org/suspendresume
[The Problem]
The vast majority of time spent in S3 resume is consumed by the ATA subsystem
as it resumes the
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