On Wed, 14 May 2014, Todd E Brandt wrote:
Does this really save any meaningful amount of time? Have you measured
it?
Yes, here's the test results from the use-case that inspired the patch:
https://01.org/suspendresume/blogs/tebrandt/2014/usb-resume-parallel-enumeration-separate-hosts
On Thu, May 15, 2014 at 10:05:55AM -0400, Alan Stern wrote:
On Wed, 14 May 2014, Todd E Brandt wrote:
Does this really save any meaningful amount of time? Have you measured
it?
Yes, here's the test results from the use-case that inspired the patch:
On Thu, 15 May 2014, Todd E Brandt wrote:
Hmmm. Why did the kernel end up re-initializing those devices in the
first place? Under normal circumstances that wouldn't happen when
resuming from system suspend.
If you were resuming from hibernation, then sure. But hibernation is
On Tue, 13 May 2014, Todd E Brandt wrote:
This patch creates a separate instance of the usb_address0 mutex for each host
controller, and attaches it to the host controller device struct. This allows
devices on separate hosts to be enumerated in parallel; saving time.
In the current code,
On Wed, May 14, 2014 at 10:27:20AM -0400, Alan Stern wrote:
On Tue, 13 May 2014, Todd E Brandt wrote:
This patch creates a separate instance of the usb_address0 mutex for each
host
controller, and attaches it to the host controller device struct. This
allows
devices on separate
On Tue, May 13, 2014 at 03:55:30PM -0700, Greg KH wrote:
On Tue, May 13, 2014 at 12:58:23PM -0700, Todd E Brandt wrote:
This patch creates a separate instance of the usb_address0 mutex for each
host
controller, and attaches it to the host controller device struct. This
allows
devices
This patch creates a separate instance of the usb_address0 mutex for each host
controller, and attaches it to the host controller device struct. This allows
devices on separate hosts to be enumerated in parallel; saving time.
In the current code, there is a single, global instance of the
On Tue, May 13, 2014 at 12:58:23PM -0700, Todd E Brandt wrote:
This patch creates a separate instance of the usb_address0 mutex for each host
controller, and attaches it to the host controller device struct. This allows
devices on separate hosts to be enumerated in parallel; saving time.
In
