Hello @kleber-souza. The regression was not fixed. There have only been mitigations.
Please see our comments in the other bug report. All information required is available in the previous bug report, but I have attached a patchset that actually fixes the regression. ** Patch added: "Reverts upstream commits 21fd9e8700de86d1169f6336e97d7a74916ed04a, 029085b8949f5d269ae2bbd14915407dd0c7f902, and 0eb43812c0270ee3d005ff32f91f7d0a6c4943af" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2015827/+attachment/5670602/+files/nfs-regression-fix-1.diff -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/2015827 Title: NFS performance issue while clearing the file access cache upon login Status in linux package in Ubuntu: In Progress Bug description: The performance issue that has been observed may be attributed to an increase in NFS ACCESS operations, possibly due to a new mechanism introduced in the Linux 6.2-rc3 NFS client side. This mechanism clears the access cache as soon as the cache timestamp becomes older than the user's login time, with the primary objective of preventing the NFS client's access cache from becoming stale due to any changes made to the user's group membership on the server after the user has already logged in on the client. It's worth noting that POSIX only refreshes the user's supplementary group information upon login. Upstream has taken into consideration that users may reasonably expect the access cache to be cleared when they log out and log back in again, with all behavior returning to normal after the replacement. The performance overhead can be particularly noticeable when applications or users switch to other privileged users via commands such as "su" to operate on NFS-mounted folders. In such cases, the privileged user's login time will be renewed, and NFS ACCESS operations will need to be re-sent, potentially leading to performance degradation. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2015827/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
