On 06/12/16 at 12:10am, Thiago Jung Bauermann wrote:

Hello,

This patch series implements the kexec_file_load system call on PowerPC.

It starts by removing an x86 assumption from kexec_file: kexec_add_buffer uses
iomem to find reserved memory ranges, but PowerPC uses the memblock subsystem.
Hooks are added so that each arch can specify how memory ranges can be found.

Also, the memory-walking logic in kexec_add_buffer is useful in this
implementation to find a free area for the purgatory's stack, so that same
patch moves that logic to kexec_locate_mem_hole.

The kexec_file_load system call needs to apply relocations to the purgatory
but adding code for that would duplicate functionality with the module loading
mechanism, which also needs to apply relocations to the kernel modules.
Therefore, this patch series factors out the module relocation code so that it
can be shared.

One thing that is still missing is crashkernel support, which I intend to
submit shortly.

But seems there's no error handling in patches about KEXEC_ON_CRASH?
It would be good to either sending out the whole set or handle the error
cases correctly.

[snip]

Thanks
Dave