On Thu, Aug 06, 2020 at 03:36:27PM +0200, Ingo Molnar wrote:

* Chen Zhou [off-list ref] wrote:

quoted

In preparation for supporting reserve_crashkernel_low in arm64 as
x86_64 does, move reserve_crashkernel_low() into kernel/crash_core.c.

BTW, move x86_64 CRASH_ALIGN to 2M suggested by Dave. CONFIG_PHYSICAL_ALIGN
can be selected from 2M to 16M, move to the same as arm64.

Signed-off-by: Chen Zhou <redacted>
---
 arch/x86/include/asm/kexec.h | 24 ++++++++++
 arch/x86/kernel/setup.c      | 86 +++---------------------------------
 include/linux/crash_core.h   |  3 ++
 include/linux/kexec.h        |  2 -
 kernel/crash_core.c          | 74 +++++++++++++++++++++++++++++++
 kernel/kexec_core.c          | 17 -------
 6 files changed, 107 insertions(+), 99 deletions(-)

Since the changes are centered around arm64, I suppose the arm64 tree 
will carry this patchset?

Assuming that this is a 100% invariant moving of code that doesn't 
regress on x86:

  Acked-by: Ingo Molnar [off-list ref]

Thanks Ingo. The only difference I see is that CRASH_ALIGN has been
reduced to 2M here from 16M for x86. Would this break configs that have
PHYSICAL_ALIGN > 2M?

-- 
Catalin