------- Comment From hbath...@in.ibm.com 2015-02-10 10:04 EDT------- Below is the documentation for fadump: ________________
Firmware-assisted dump Firmware Assisted Dump (fadump) is an alternative to kdump crash dumping mechanism, available in powerpc architecture. To understand how fadump works, please refer to the kernel documentation below: https://www.kernel.org/doc/Documentation/powerpc/firmware-assisted- dump.txt Two steps are needed to use fadump as the crash dumping mechanism. Firstly, enabling fadump by passing "fadump=on" to kernel. Secondly, registering fadump by echo'ing `1` to /sys/kernel/fadump_registered. 1. To enable fadump: a. Add "fadump=on" to GRUB_CMDLINE_LINUX in /etc/default/grub file. b. Rebuild grub config # grub-mkconfig -o /boot/gru/grub.cfg c. Reboot 2. To register fadump: kdump-tools, scripts and tools for automating kdump, is updated to make it fadump aware. When fadump is enabled, kdump-tools registers fadump as crash dumping mechanism, by echo'ing `1` to /sys/kernel/fadump_registered. For more help, see: # kdump-config help NOTE: If fadump fails to collect dump with Out Of Memory error, use "fadump_reserve_mem=" parameter to spike up the memory reserved for firmware-assisted dump. ____________________ Breno, please add this to https://wiki.ubuntu.com/ppc64el/ Thanks Hari -- 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/1415562 Title: [Ubuntu 15.04] Support firmware assisted dump on ppc64le Status in linux package in Ubuntu: Fix Committed Status in makedumpfile package in Ubuntu: In Progress Bug description: Starting from POWER6, the firmware now has a capability to preserve the partition memory dump during system crash and boot into a fresh copy of the kernel with fully-reset system. This feature adds the necessary support to exploit the dump capture capability provided by Power firmware. With this feature support, the production kernel will register for firmware-assisted dump using RTAS (Runtime Abstraction Service) calls and builds required ELF header which then gets exported through '/proc/vmcore' in the second kernel after crash. This feature improves Power serviceability by making it more robust compared to current kdump mechanism on Linux. Ubuntu 15.04 kernel already includes the necessary code for fadump. The only kernel change needed is to enable CONFIG_FA_DUMP in the kernel configuration. In addition, an update is needed for a script in kdump-tools package. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1415562/+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
