[PATCH v1 0/3] kernel/resource: make walk_system_ram_res() and walk_mem_res() search the whole tree

[David Hildenbrand]

Playing with kdump+virtio-mem I noticed that kexec_file_load() does not
consider System RAM added via dax/kmem and virtio-mem when preparing the
elf header for kdump. Looking into the details, the logic used in
walk_system_ram_res() and walk_mem_res() seems to be outdated.

walk_system_ram_range() already does the right thing, let's change
walk_system_ram_res() and walk_mem_res(), and clean up.

Loading a kdump kernel via "kexec -p -s" ... will result in the kdump
kernel to also dump dax/kmem and virtio-mem added System RAM now.

Note: kexec-tools on x86-64 also have to be updated to consider this
memory in the kexec_load() case when processing /proc/iomem.

Against next-20210322.

David Hildenbrand (3):
  kernel/resource: make walk_system_ram_res() find all busy
    IORESOURCE_SYSTEM_RAM resources
  kernel/resource: make walk_mem_res() find all busy IORESOURCE_MEM
    resources
  kernel/resource: remove first_lvl / siblings_only logic

 kernel/resource.c | 45 ++++++++++++---------------------------------
 1 file changed, 12 insertions(+), 33 deletions(-)

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2.29.2