[$] Getting Lustre upstream

The Lustre filesystem has a long
history, some of which intersects with Linux. It was added to the staging
tree in 2013, but was bounced out of
staging in 2018, due to a lack of progress and a development model
that was incompatible with the kernel's. Lustre may be working its way
back into the kernel, though. In a filesystem-track session at
the 2025 Linux Storage, Filesystem, Memory Management, and BPF Summit
(LSFMM+BPF), Timothy Day and James Simmons led a discussion on how to get
Lustre into the mainline.