Am Mittwoch, 06 Juli 2016, 16:52:19 schrieb AKASHI Takahiro: > On the startup of primary kernel, the memory region used by crash dump > kernel must be specified by "crashkernel=" kernel parameter. > reserve_crashkernel() will allocate and reserve the region for later use. > > User space tools, like kexec-tools, will be able to find that region > marked as "Crash kernel" in /proc/iomem. On powerpc, userspace tools get everything from the device tree (exposed to userspace in /proc/device-tree/), not /proc/iomem. In the case of the crashkernel reserved region, that information is in /chosen/linux,crashkernel-base and /chosen/linux,crashkernel-size. Either way is fine I think. I'm just mentioning this for reference in case you want the ARM implementation to be closer to another arch which is also based on the device tree. -- []'s Thiago Jung Bauermann IBM Linux Technology Center
