Re: #10, Luis, thanks for your efforts on this. By running http://people.canonical.com/~henrix/lp974664v2, the Oops is indeed resolved and the rate limiting is definitely reducing the numbers of messages produced but none the less there are many many dozens of messages produced still -- just like with the mainline kernel infact. I assume the mainline kernel also had the rate limiting patch applied.
I'm not entirely sure about the "harmless" nature of the messages however. My perception is that logging in is somewhat slower -- this may be down to the beta nature of the release at present however what I am observing, even after logon of the user has completed is a high level of network activity. Running a packet trace and a wireshark dump of this activity, it seems that the activity is down to NFS and it seems (see screenshot attached) to be stuck in somewhat of a loop -- specifically continually getting an error when trying to lock the file (each time the same file). I wonder if the slowness has the same root cause (the shere number of failed retries -- looking at the packet trace it seems, if I'm not mistaken, there's about 1000 per second of these!) I observe the file being processed is user.keystore and in my case, the prior oops was triggered by gnome-keyring-d so I can't help feeling these issues are related. However I will admit I'm no expert on NFS so I could be seeing ghosts :-) Let me know if there is any information I can provide that might help. ** Attachment added: "Packet capture" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/974664/+attachment/3085980/+files/Screenshot%20from%202012-04-17%2021%3A55%3A23.png -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/974664 Title: Kernel Oops - BUG: unable to handle kernel paging request at ffffffffffffffb8; RIP: 0010:[<ffffffffa05a5839>] [<ffffffffa05a5839>] nfs_have_delegation+0x9/0x40 [nfs] To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/974664/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
