Andres, Following up on this again and also have an update based on the following email discussion with the author that wrote the original diff and seems like this patch is indeed required to fix the mount regression. Can you please provide an update if Ubuntu jammy can release a new package with the patch officially?
On Tue, 07 Jan 2025, Ramakrishnan Sundareswaran wrote: > Hi Neal, > > I would like your inputs on a potential regression in the nfs-utils > package on Ubuntu 22.04/Jammy. > > I've filed the following ticket > https://bugs.launchpad.net/ubuntu/+source/nfs-utils/+bug/2091737 for > the Ubuntu Jammy nfs-utils which seems to have a regression fixed by > you in this patch > https://patchwork.kernel.org/project/linux-nfs/patch/20231023021052.5258-4-ne...@suse.de/ > [3/6] export: move cache_open() before workers are forked > > However, based on the current discussion in the Ubuntu bug report, we > still haven't gotten confirmation that this is indeed a regression > that was fixed in a subsequent commit. > > Based on the ticket, there are three key questions that I'm trying to > understand > > Questions: > 1. Is the mount issue relevant to the above patch? The fact that applying the patch makes your problem go away seems fairly conclusive. It only affects configurations with more than 1 mountd thread. If you change back to 1 thread I suspect the slowness will go away. That is the config that most people test which is probably why most people don't notice. If you confirm that: - without the patch: - with "--num-threads=1" you don't see slowness - with "--num-threads=8" you do see slowness - with the patch - with --num-threads= 1 or 8 you don't see any slowness then that would confirm that this patch exactly addresses your problem. > 2. We are not yet prepared to upgrade to Ubuntu Noble yet which has > the patch of interest. Can we expect another upgrade for nfs-utils on > Jammy which incorporates this patch? > 3. Can the patch > https://patchwork.kernel.org/project/linux-nfs/patch/20231023021052.5258-4-ne...@suse.de/ > be applied in isolation? Yes. There are no non-obvious dependencies. NeilBrown -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. 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) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nfs-utils/+bug/2091737/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
