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Kernel Space: MDADM and LEGACY_PCI in Linux

Submitted by Roy Schestowitz on Monday 3rd of January 2022 05:24:01 PM Filed under
Linux
  • MDADM 4.2 Released For Managing Linux Software RAID - Phoronix

    The mdadm utility for managing Linux software RAID arrays is out with a new release -- its first in more than three years.

    MDADM 4.1 was released long before the pandemic even got started... All the way back in October 2018. As such with MDADM 4.2 now available, it's a rather big update. Meta's Jes Sorensen released MDADM 4.2 just before the new year. Jes summed up v4.2 as, "The release includes more than two years of development and bugfixes, so it is difficult to remember everything. Highlights include enhancements and bug fixes including for IMSM RAID, Partial Parity Log, clustered RAID support, improved testing, and gcc-9 support."

  • New Linux Patch Series Proposes Gating "Legacy PCI" Support - Phoronix

    A patch series sent out by IBM would introduce a new "LEGACY_PCI" Kconfig option for gating legacy PCI device support, including PCI devices attached to PCI-to-PCIe bridges and PCIe devices using legacy I/O spaces.

    Sent out over the holidays were a set of 32 patches proposing new LEGACY_PCI and HAS_IOPORT options for the Linux kernel. The justification for the patch series is IBM's s390 architecture not supporting legacy PCI devices nor PCI I/O spaces. The interesting aspect for non-s390 Linux users is on the LEGACY_PCI toggle to which it has already been successfully tested on x86_64 hardware and AArch64 (ARM64) too.

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