FUSE, OverlayFS, Ceph Ready With Improvements For Linux 5.11
Written by Michael Larabel in Linux Storage on 19 December 2020 at 08:09 AM EST. 1 Comment
LINUX STORAGE --
This first week of the Linux 5.11 merge window continues to be very active with many of the kernel maintainers looking to land their changes ahead of the Christmas week where they are often taking time off work.

On top of other file-system improvements covered already for Linux 5.11 like a ton of Btrfs improvements and more F2FS encryption/casefolding/compression feature work, the Ceph, OverlayFS, and FUSE components all have some changes worth noting for Linux 5.11.

FUSE is worth noting because of improved performance for VirtIO-FS with mixed read/write workloads. This builds atop earlier VirtIO-FS performance work found in the prior kernel, Linux 5.10. The VirtIO-FS performance work this round is in regards to supporting FUSE_HANDLE_KILLPRIV_V2 and enabling SB_NOSEC. Those curious about the technical details to that performance work can see this patch series.

OverlayFS meanwhile is notable for now allowing unprivileged mounts. There is also support for running on copied file-system images by optionally disabling UUID verification.

Ceph meanwhile now supports the MSGR2 on-wire protocol that allows for full, in-transit encryption using AES-GCM. Plus there are fixes and other Ceph improvements.

Lots of great work continues to land for Linux 5.11 in what will make for a very exciting first stable kernel release of 2021. The Linux 5.11-rc1 release won't be out until 27 December while the stable debut should happen in February.
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Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter or contacted via MichaelLarabel.com.

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