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SubjectRe: [RFC PATCHv2] usb: move hub init and LED blink work to power efficient workqueue
On Sat, 1 Feb 2014, Zoran Markovic wrote:

> From: Shaibal Dutta <shaibal.dutta@broadcom.com>
>
> Allow the scheduler to select the best CPU to handle hub initalization
> and LED blinking work. This extends idle residency times on idle CPUs
> and conserves power.
>
> This functionality is enabled when CONFIG_WQ_POWER_EFFICIENT is selected.
>
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Cc: Alan Stern <stern@rowland.harvard.edu>
> Cc: Sarah Sharp <sarah.a.sharp@linux.intel.com>
> Cc: Xenia Ragiadakou <burzalodowa@gmail.com>
> Cc: Julius Werner <jwerner@chromium.org>
> Cc: Krzysztof Mazur <krzysiek@podlesie.net>
> Cc: Matthias Beyer <mail@beyermatthias.de>
> Cc: Dan Williams <dan.j.williams@intel.com>
> Cc: Mathias Nyman <mathias.nyman@linux.intel.com>
> Cc: Thomas Pugliese <thomas.pugliese@gmail.com>
> Signed-off-by: Shaibal Dutta <shaibal.dutta@broadcom.com>
> [zoran.markovic@linaro.org: Rebased to latest kernel. Added commit message.
> Changed reference from system to power efficient workqueue for LEDs in
> check_highspeed() and hub_port_connect_change().]
> Signed-off-by: Zoran Markovic <zoran.markovic@linaro.org>

Acked-off-by: Alan Stern <stern@rowland.harvard.edu>

Is there some reason why schedule_delayed_work() doesn't use the
power-efficient work queue by default?

Alan Stern



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