Public bug reported: Problem description : ======================
Triggered FADump with the recommended crash. L1 host got hung. As per the public document https://wiki.ubuntu.com/ppc64el/Recommendations recommended crash kernel size is 1024M for the system. But with 1024M and 2048M, the L1 is getting hanged. with 4096, crash is generated and collected. root@ubuntu2404:~# uname -ar Linux ubuntu2404 6.8.0-11-generic #11-Ubuntu SMP Wed Feb 14 00:33:03 UTC 2024 ppc64le ppc64le ppc64le GNU/Linux root@ubuntu2404:~# free -h total used free shared buff/cache available Mem: 48Gi 1.7Gi 46Gi 13Mi 687Mi 46Gi Swap: 8.0Gi 0B 8.0Gi root@ubuntu2404:~# cat /proc/cmdline BOOT_IMAGE=/vmlinux-6.8.0-11-generic root=/dev/mapper/ubuntu--vg-ubuntu--lv ro fadump=on crashkernel=1024M root@ubuntu2404:~# dmesg | grep -i reser [ 0.000000] fadump: Reserved 1024MB of memory at 0x00000040000000 (System RAM: 51200MB) [ 0.000000] fadump: Initialized 0x40000000 bytes cma area at 1024MB from 0x40070000 bytes of memory reserved for firmware-assisted dump [ 0.000000] Memory: 49316672K/52428800K available (23616K kernel code, 4096K rwdata, 25536K rodata, 8832K init, 2487K bss, 2063552K reserved, 1048576K cma-reserved) [ 0.396408] ibmvscsi 30000066: Client reserve enabled root@ubuntu2404:~# kdump-config show DUMP_MODE: fadump USE_KDUMP: 1 KDUMP_COREDIR: /var/crash /var/lib/kdump/vmlinuz kdump initrd: /var/lib/kdump/initrd.img current state: ready to fadump IBM is looking to update the crash kernel reservations section of the wiki for Power. ** Affects: linux (Ubuntu) Importance: Undecided Assignee: Ubuntu on IBM Power Systems Bug Triage (ubuntu-power-triage) Status: New ** Tags: architecture-ppc64le bugnameltc-205921 severity-high targetmilestone-inin--- ** Tags added: architecture-ppc64le bugnameltc-205921 severity-high targetmilestone-inin--- -- 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/+source/linux/+bug/2060039/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
