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New Wake Locks Patches Published For Linux Kernel

Linux Kernel

Published on 27 February 2012 10:04 AM EST
Written by Michael Larabel in Linux Kernel
13 Comments

While this weekend saw the release of the Linux 3.3-rc5 kernel, which Linus Torvalds self-admitted was pretty boring, also hitting the mailing list this past week were new kernel patches to implement auto-sleep and "wake locks" support.

A set of eight patches were published by Rafael J. Wysocki to provide the latest incarnation of this controversial work. One of the patches introduces support that allows the Linux kernel to trigger system suspend (auto-transitioning into a sleep state) whenever there are no active wake-up sources. This auto-sleep support is the same as "opportunistic suspend", which was talked about previously.

The other big item with this patch-set was the wake locks support, which allows for wake-up sources to be created and manipulated from user-space. Wake locks is an Android feature that may now work its way into the upstream kernel in this implementation. Rafael considers this latest work to be "a kind of proof of concept."

Find more information on this Linux kernel power management work via this mailing list post.

About The Author
Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via and or contacted via .
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