Andreas,
I was able to pick the packages built in
https://launchpad.net/~ahasenack/+archive/ubuntu/nfs-slow-
mounts/+build/29866486 and test out the experiment.
ubuntu@vm-machine-s82gbm-3ojtydo:~/nfs_ppa$ dpkg --list | grep ppa1
ii libnfsidmap-dev 1:2.6.1-1ubuntu1.3~ppa1
amd64 header files and docs
for libnfsidmap
ii libnfsidmap1:amd64 1:2.6.1-1ubuntu1.3~ppa1
amd64 NFS idmapping library
ii nfs-common 1:2.6.1-1ubuntu1.3~ppa1
amd64 NFS support files
common to client and server
ii nfs-kernel-server 1:2.6.1-1ubuntu1.3~ppa1
amd64 support for NFS kernel
server
The package is working as expected and I don't see slow mounts anymore.
With 40 exports, the same command to perform a single mount consistently
takes 1-2s
Mounting /sd/mount/oracle/jammy_patch/test1 to
/tmp/test/jammy_patch/test1
real 0m1.328s
user 0m0.002s
sys 0m0.005s
Mounting /sd/mount/oracle/jammy_patch/test1 to
/tmp/test/jammy_patch/test1
real 0m1.183s
user 0m0.003s
sys 0m0.004s
Even though the custom FUSE filesystem made the issue more evident, we
can still observe the increase in teh number of statx calls and analysis
shared in https://bugs.launchpad.net/ubuntu/+source/nfs-
utils/+bug/2091737/comments/6 which can be reproducible on any
filesystem and can be done by anyone.
With regards to the official test plan, would it be possible for the
Ubuntu(jammy) team to check with Neil Brown or nfs-utils maintainers to
confirm since the patch has indeed been committed to upstream nfs-utils
versions and subsequent releases?
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https://bugs.launchpad.net/bugs/2091737
Title:
Slow NFS Mounts with nfs-utils 1:2.6.1-1ubuntu1.2 (Regression from
1:1.3.4-2.5ubuntu3)
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