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Kernel: ThinkPad Palm Sensor, MUSE, Intel and Memory

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Linux

  • Lenovo ThinkPad Palm Sensor Support Coming To Linux 5.11 - Phoronix

    As part of Lenovo offering Linux pre-loaded on more laptops and desktops, they have been working on upstream improvements themselves along with their partners at Red Hat and others. One of the latest Lenovo-contributed improvements to the kernel is palm sensor support for newer ThinkPad notebooks. 

    Palm sensor support is being contributed by Lenovo to the Linux 5.11 kernel for their ThinkPad hardware. This is similar to the existing lap sensor support for the ThinkPad ACPI code and allows detecting if a user's palms/hands are near the keyboard area. Like the lap sensor, the palm sensor data is exposed to user-space via sysfs. It's up to the user-space for anything that should be done if the user's palms have been detected near the keyboard. 

  • Following FUSE & CUSE, Now There Is "MUSE" For MTD In Userspace - Phoronix

    FUSE is well known to longtime Linux users for allowing file-systems to be implemented in user-space for where a Linux kernel port isn't feasible for portability or licensing restrictions, among other factors. There is also CUSE for character devices in user-space. Now being based on FUSE, there is "MUSE" being worked on for MTD in user-space. 

  • Intel Sends In More DG1 Enablement Code, Big Joiner For Linux 5.11 - Phoronix

    Intel's Linux graphics driver developers have submitted their final batch of feature changes targeting the Linux 5.11 kernel. 

    With Linux 5.10-rc6 upon us this weekend, it's basically hitting the cut-off of new feature code to be sent into DRM-Next ahead of the Linux 5.11 merge window opening around mid-December. The Intel pull request of their graphics driver work is acknowledged as their last batch of feature work for the 5.11 cycle. 

    Already from previous pull requests to DRM-Next have been more Gen12 / Tiger Lake fixes, integer scaling support, async page flipping, and other changes. 

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  • Memory Is Not a File

    An advantage of this approach, he says, “manifests when programs running on UNIX get a “file” to open and, lo, it’s actually the name of a device. Most UNIX programs will still work, provided that the calling process has the correct authorization to open the file.” 

    In the article, titled “Everything is a Punch Card,” Garfinkel examines the origins of files and file systems, as well as the related history of punch cards and tabulating machines. He notes that “English has had a difficult relationship with the word “file” since the beginning. Sometimes the word refers to the case or container for organizing physical embodiments of information, sometimes it refers to the objects put into that container, and sometimes it refers to the information itself.”

    Garfinkel also looks at one thing that is not a file: memory. “Yes,” he says, “Linux systems have devices like /dev/mem and /dev/kmem that let programs access memory through the file system, but memory is not file.” He compares the UNIX approach with that of the Multics operating system, “in which files are actually named segments in a two-dimensional memory address space.” On Multics, he says, “saving a “file” was really creating a named memory segment and then persisting it to long-term storage.”

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