While the operation rates are drastically improved compared to the
broken kernel, even with the the patched kernel 5.15.0-69.76 we're still
seeing a large increase in NFS ACCESS operations, up from about 90/s to
1500/s over a couple servers. Additionally, about a 5x increase in
LOOKUP operations
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2003053/comments/21
We are seeing this issue with NFSv3. NFS ACCESS operations increased
quadratically after upgrading to 5.4.0-144 and 5.15.0-67. Downgrading to
either 5.4.0-139-generic or 5.15.0-60-generic resolves the issue again.
The
This patch appears to have caused a massive (thousandfold) increase in
NFS ACCESS operations.
Tested with Ubuntu 20.04 and these kernels:
5.4.0-144-generic
5.15.0-67-generic
Downgrading to either 5.4.0-139-generic or 5.15.0-60-generic resolves
the issue again.
One busy server using NFS
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