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Latest in Linux 4.20~5.0

Submitted by Roy Schestowitz on Friday 28th of September 2018 03:31:52 AM Filed under
Linux
  • BLK-MQ To Support Runtime Power Management With Linux 4.20~5.0

    The Linux mult-queue block I/O layer (blk-mq) has been working out well for delivering very fast performance particularly for modern NVMe solid-state storage and SCSI drives. But it turns out run-time power management hasn't been in use when blk-mq is active.

    The multi-queue block code brings per-CPU software queues and these software queues can map to hardware issue queues. These multiple queues can reduce locking contention and the overall blk-mq design jives with current high-performance solid-state drive characteristics. The key drivers have been ported over to using blk-mq for a while now (end of Linux 3.xx / early 4.x kernels) and for Linux systems not using it by default can be activated easily via the scsi_mod.use_blk_mq=1 boot option.

  • FUSE Getting Another Performance Boost In Linux 4.20~5.0

    Separate from the recent FUSE performance work talked about for making FUSE faster with the eBPF in-kernel JIT that hasn't been staged for mainlined, "File-Systems in User-Space" are set to see better performance on the next kernel (Linux 4.20~5.0) thanks to other changes.

    Already having been queued for this next kernel cycle is copy_file_range support for FUSE to yield more efficient copy operations.

»

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