[Kernel-packages] [Bug 2009325] Re: NFS deathlock with last Kernel 5.4.0-144.161 and 5.15.0-67.74

2023-03-24 Thread Jan Ingvoldstad
Not only is it about severe loss of service, but this also keeps numerous systems at risk because they cannot easily install a kernel with the security fixes. For the future, please consider not bundling security releases with other fixes, as to avoid this situation where systems essentially remai

[Kernel-packages] [Bug 2009325] Re: NFS deathlock with last Kernel 5.4.0-144.161 and 5.15.0-67.74

2023-03-28 Thread Jan Ingvoldstad
I think Ben's question could be clarified with: How does "login" relate to non-login (non-interactive) processes started automatically via system processes? Our issue is with suexec-like mechanisms, and the 2 orders of magnitude increase ACCESS and 1 order of magnitude for LOOKUP, while significa

[Kernel-packages] [Bug 2009325] Re: NFS deathlock with last Kernel 5.4.0-144.161 and 5.15.0-67.74

2023-03-28 Thread Jan Ingvoldstad
Thanks again, but why is it not possible to roll back the NFS change and roll out only the security relevant content in the meanwhile? Nearly one month and counting for balancing the need for systems being up vs. having security updates is not quite tenable for most system administrators. -- You

[Kernel-packages] [Bug 2015827] Re: NFS performance issue while clearing the file access cache upon login

2023-04-11 Thread Jan Ingvoldstad
Please note that this is a bug that for unknown reasons have been backported from 6.2-rc3 to LTS released kernels in Ubuntu Server LTS. Upstream is not responsible for making the decision of whether this backported change should be part of older kernels in Ubuntu Server LTS. Please revert the cha

[Kernel-packages] [Bug 2009325] Re: NFS deathlock with last Kernel 5.4.0-144.161 and 5.15.0-67.74

2023-04-11 Thread Jan Ingvoldstad
Hi @chengendu, Thanks. I have posted a comment to the effect of backporting changes in new (and at the time, unreleased and not yet stable) Linux kernels to LTS releases. There is no need to await upstream's feedback and judgment, this change belongs to Linux 6.2, not old LTS kernels. -- You re

[Kernel-packages] [Bug 2015827] Re: NFS performance issue while clearing the file access cache upon login

2023-05-02 Thread Jan Ingvoldstad
Judging from the utter lack of response to the core issue of backporting untested patches from an - at the time - release candidate unstable upstream Linux version, back to what is supposed to be *three* long term support "enterprise grade" Ubuntu editions, it seems that Ubuntu's policy for Linux k

[Kernel-packages] [Bug 2015827] Re: NFS performance issue while clearing the file access cache upon login

2023-05-03 Thread Jan Ingvoldstad
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 up