------- Comment From [email protected] 2024-10-16 07:47 EDT------- I have verified bug on 6.8.0-48-generic kernel and the issue is still getting recreated.
My system had 15G Memory and according to the recommendation here: https://wiki.ubuntu.com/ppc64el/Recommendations I had reserved 512M for the crashkernel. I had enabled FADump and triggered sysrq crash and observed the L1 hang issue again. I have attached the console log next comment. Below are the ENV details on which I had verified this scenario root@ubuntu2404:~# uname -ar Linux ubuntu2404 6.8.0-48-generic #48-Ubuntu SMP Fri Sep 27 14:02:57 UTC 2024 ppc64le ppc64le ppc64le GNU/Linux root@ubuntu2404:~# cat /proc/cmdline BOOT_IMAGE=/vmlinux-6.8.0-48-generic root=/dev/mapper/ubuntu--vg-ubuntu--lv ro fadump=on fadump_reserve_mem=512M root@ubuntu2404:~# dmesg | grep -i reser [ 0.000000] fadump: 'fadump_reserve_mem=' parameter is deprecated in favor of 'crashkernel=' parameter. [ 0.000000] fadump: Reserved 512MB of memory at 0x00000020000000 (System RAM: 16384MB) [ 0.000000] fadump: Initialized 0x20000000 bytes cma area at 512MB from 0x20030000 bytes of memory reserved for firmware-assisted dump [ 0.000000] Kernel command line: BOOT_IMAGE=/vmlinux-6.8.0-48-generic root=/dev/mapper/ubuntu--vg-ubuntu--lv ro fadump=on fadump_reserve_mem=512M [ 0.000000] Memory: 16040704K/16777216K available (23680K kernel code, 4096K rwdata, 25472K rodata, 8832K init, 1901K bss, 212224K reserved, 524288K cma-reserved) [ 0.278704] ibmvscsi 30000069: Client reserve enabled root@ubuntu2404:~# kdump-config show DUMP_MODE: fadump USE_KDUMP: 1 KDUMP_COREDIR: /var/crash /var/lib/kdump/vmlinuz: symbolic link to /boot/vmlinux-6.8.0-48-generic kdump initrd: /var/lib/kdump/initrd.img: symbolic link to /var/lib/kdump/initrd.img-6.8.0-48-generic current state: ready to fadump -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2060039 Title: [Ubuntu-24.04] FADump with recommended crash size is making the L1 hang To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/2060039/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
