------- Comment From t...@uk.ibm.com 2021-12-06 09:43 EDT------- It was filed with Canonical because we are running with a Ubuntu 20 userland; this is probably a mistake since it is clearly a kernel bug. How do I un-file a bug ? May be better to just wait until they reject it.
Do you think Xilinx technical support might help us ? I can ask my manager if he is paying them for that. But LTC can't mirror a bug to Xilinx the way they can to RedHat, SuSE and Canonical. It's definitely a bug, and it is badly hurting the ability of IBM Research to deliver the next version of the IBM Cloud. Should I try to fix it myself ? re-familiarising myself with the linux kernel and the meaning of each of those hundreds of kernel debug messages would take ages. 15 years ago is better than never, I would say. Can I persuade my manager to fund you for some of this ? And you can 'ssh' to the machine, and work its power-cycling mechanism without us having to let someone external in through the IBM VPN and all that that entails. Eagerly awaiting reply. -- 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/1952185 Title: Embedded ARM64 crash trying to zero-fill an 8GB ramdisk Status in linux package in Ubuntu: New Bug description: ---Problem Description--- Kernel crash when setting up ramdisk on embedded ARM Contact Information = Chris Ward t...@uk.ibm.com Mohit Kapur moh...@us.ibm.com ---Additional Hardware Info--- Embedded ARM with FPGA ---uname output--- Linux cuttlefisharm1 5.4.0-xilinx-v2020.2 #1 SMP Thu Nov 18 18:44:45 UTC 2021 aarch64 aarch64 aarch64 GNU/Linux Machine Type = IBM Research internal processor based on xilinx ---System Hang--- Unresponsive. Power cycle reclaims ---Debugger--- A debugger is not configured ---Steps to Reproduce--- Boot the system. Try dd if=/dev/zero of=/dev/ram0 bs=... count=... A small ramdisk works and gives the expected error when trying to write 8G of data into an 8M ramdisk. tjcw@cuttlefisharm1:~$ sudo dd if=/dev/zero of=/dev/ram0 bs=4096 count=1048576 [sudo] password for tjcw: dd: error writing '/dev/ram0': No space left on device 2049+0 records in 2048+0 records out 8388608 bytes (8.4 MB, 8.0 MiB) copied, 0.0531788 s, 158 MB/s tjcw@cuttlefisharm1:~$ A 2GB ramdisk works, a 4GB ramdisk causes a crash To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1952185/+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
