It's apparent that a number of distributions and their customers remain on long-term stable kernels. We are aware of the scalability problems and other bugs in NFSD in kernels between v5.4 and v6.1. To address the filecache and other scalability problems in those kernels, I'm preparing backported patches of NFSD fixes for several popular LTS kernels. These backports are destined for the official LTS kernel branches so that distributions can easily integrate them into their products. Once this effort is complete, Greg and Sasha will continue to be responsible for backporting NFSD-related fixes from upstream into the LTS kernels. Here's a status update. --- I've pushed the NFSD backports to branches in this repo: https://git.kernel.org/pub/scm/linux/kernel/git/cel/linux.git If you are able, I encourage you to pull these, review them or try them out, and report any issues or successes. I'm currently using the NFS workflows in kdevops as the testing platform, but am planning to include other tests. LTS v5.15.y v5.15.154 has been released, and it includes the NFSD filecache backports. Oracle's own QA team found a small fcntl regression, which should be addressed by v5.15.156. I am continuing to watch for issues. You can find these patches in the "nfsd-5.15.y" branch in the above repo. LTS v5.10.y No change here this week. It needs to be rebased, and a few extra commits are needed to match up with what's now in v5.15.154. Next week is NFS bake-a-thon. I plan to restart work on nfsd-5.10.y the following week. You can find these patches in the "nfsd-5.10.y" branch in the above repo. -- Chuck Lever
