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Kernel: Core Scheduling and Distributed Lock Manager in Linux

Submitted by Roy Schestowitz on Sunday 4th of July 2021 04:45:38 PM Filed under
Linux

  • Linux Will Keep Core Scheduling Disabled By Default - Phoronix

    Among the many new features that were sent in so far this week for the Linux 5.14 merge window was the long in-development work on "core scheduling" to reduce the Hyper Threading information leakage risks from side channels and help ensuring deterministic performance on such HT/SMT systems by controlling the resources that can run on a sibling thread. As a follow-up to that article from a few days ago, core scheduling will now be disabled by default.

    With the original scheduling pull request that landed earlier this week, the new "CONFIG_SCHED_CORE" build option defaulted to on by default. Linus Torvalds noticed that default enabling even though core scheduling is unlikely to be of interest to the vast majority of Linux users.

  • Linux 5.14 Improving Its Distributed Lock Manager To Allow Message Re-Transmission - Phoronix

    The Linux kernel's Distributed Lock Manager as a general purpose DLM for kernel and user-space applications with cluster computing systems is seeing a useful reliability improvement with Linux 5.14.

    The Distributed Lock Manager will now be able to handle message re-transmission so nodes can continue operating when network connections fail and then reconnect. Up to now DLM in this case didn't re-transmit messages and would treat them as lost and would be handled as a node failure.

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