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Linux 5.13 Kernel Progress

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  • Concurrent TLB Flushing For Linux 5.13 Provide A Small Performance Benefit - Phoronix

    Linux 5.13's x86 memory management work is bringing a minor performance optimization that is particularly beneficial in light of the CPU security mitigations in recent years that have an impact on the TLB.

    VMware engineers for the past two years were looking at concurrent TLB flushes for Linux to flush local and remote translation lookaside buffers concurrently.

  • AMD's Crypto Co-Processor Driver Adds Green Sardine Support In Linux 5.13 - Phoronix

    The crypto subsystem updates have landed in the Linux 5.13 kernel.

    This time around on the cryptography side the ECDSA algorithm has been added and a number of other minor improvements to the different crypto accelerator drivers.

  • AMD Energy Driver Booted From The Linux 5.13 Kernel - Phoronix

    While a lot of new features and improvements have been accumulating for the Linux 5.13 kernel with the ongoing merge window, one of the unfortunate aspects of this new kernel is that the AMD Zen CPU energy driver "amd_energy" is indeed being removed.

    It's not being removed as some superior driver is being introduced but rather a disagreement between the upstream kernel maintainer(s) and AMD over the handling of the exposed energy sensors. The situation was laid out earlier this month in AMD Energy Monitoring Driver Slated To Be Removed From The Linux Kernel. Long story short, since last year the AMD Energy sensor information has been limited to root due to the PLATYPUS security vulnerability. HWMON maintainer Guenter Roeck proposed slightly limiting and randomizing the sensor data so it couldn't be used for nefarious purposes but still accurate enough for genuine use-cases and no longer needing to be root-only access. However, AMD engineers didn't like that approach.

Some FUD du jour from Microsoft site

Btrfs Continues Ironing Out Zoned Mode Support, Some Performance

  • Btrfs Continues Ironing Out Zoned Mode Support, Some Performance Work

    Btrfs' readahead for send handling has been improved to the extent that the run-time for a full send is faster by about 10% and then 25% for incremental send. Btrfs also has ironed out its zoned mode support that began appearing in Linux 5.12, reflinks now respect O_SYNC/O_DSYNC/S_SYNC flags, more graceful errors on 32-bit systems, automatic background reclaim of zones that have 75%+ of unusable space, and a wide variety of fixes.

Mayank Sharma

Microsoft-sponsored Linux FUD

Microsoft-connected sites focus on "LINUX" security issues

Another Microsoft-connected site

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