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Old 09-17-2012, 03:41 PM   #1
LXer
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LXer: Kernel Log - Coming in 3.6 (Part 3): Architecture


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Linux 3.6 can cut off the power to PCIe chips and ATA ports. A new userspace driver framework is designed to provide faster access to individual PCI/PCIe devices for virtualised systems. Linux kernel version 3.6, expected to be released in about one to two weeks, can send PCIe devices into the "D3cold" deep sleep state; this is supported by certain modern computers to completely power down individual PCIe devices (1, 2, 3). The Libata subsystem can now put individual ATA ports into such a sleep state; this is to be the basis for code that is being prepared for future kernel versions to support deep sleep states for optical drives, a technology that is called ZPODD (Zero-Power Optical Disk Drive).

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