long-term stable backports of NFSD patches

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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

There was one new NFSD-related regression reported this week:
"killall -9 nfsd" triggers an oops. There was one missing patch
in the backport which should now be queued for v5.15.158.

I am continuing to watch for issues.

You can find these patches in the "nfsd-5.15.y" branch in the above
repo. This branch has been rebased on v5.15.157.


LTS v5.10.y

No change here this week. I hope to restart work on nfsd-5.10.y
this week by backporting the handful of NFSD patches that are in
v5.15.y but not yet in v5.10.y.

You can find these patches in the "nfsd-5.10.y" branch in the above
repo.


-- 
Chuck Lever




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