[PATCH v5] arm64: kdump: simplify the reservation behaviour of crashkernel=,high

[Leizhen (ThunderTown)]

On 2023/4/13 22:30, Catalin Marinas wrote:
> On Thu, Apr 13, 2023 at 03:45:50PM +0800, Baoquan He wrote:
>> I am OK with this version, or the version with min(SZ_4G,
>> arm64_dma_phys_limit), or v4. Please help point out if I got your idea
>> correctly. Thanks a lot.
> 
> I think we should stick to this patch. The disabling of the ZONE_DMA(32)
> is fairly specialised and you are right that we should not introduce an
> artificial 4GB crashkernel boundary on such systems. The slight
> confusion may be that ,high triggers a search above 4GB where there's
> not such boundary but this would match the documentation anyway.
> 

Agreed, so careful.

-- 
Regards,
  Zhen Lei