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Kernel: F2FS and Compressed Firmware Files

Submitted by Roy Schestowitz on Saturday 13th of July 2019 03:44:01 AM Filed under
Linux
  • F2FS Gains Native SWAP File Support, Other Improvements

    F2FS remains a very interesting file-system and has seen particularly good adoption on newer Android devices while it continues to shine as well for laptop and desktop SSD storage. With Linux 5.3 there is finally native SWAP file support for F2FS that can make use of direct I/O for better swapping performance. F2FS is also getting the ability to pre-allocate physical blocks in a pinned file to avoid fragmentation in append-only workloads, more sanity checks, and a variety of bug fixes.

  • Linux 5.3 Picks Up Support For Compressed Firmware Files - Measurable Storage Savings

    SUSE's Takashi Iwai has been working on support for loading compressed firmware files and with the Linux 5.3 driver core patches there is this support. On his own system, he started out with /lib/firmware occupying over 400MB of the disk. When making use of XZ compression, this dropped to around 130MB in total. Thus easily being able to shave off several hundred megabytes from the disk due to all these firmware blobs is an easy win.

    The firmware files remain compressed on disk while at firmware loading time into the kernel the decompression is done. Only XZ compression is currently supported. When the CONFIG_FW_LOADER_COMPRESS option is enabled, the kernel will first try to load a firmware file of the original name but otherwise falls back trying to load any file with the same name appended by the .xz extension.

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