On Wed, 11 May 2022 11:20:32 +0800, Zhen Lei wrote:
> When "crashkernel=X,high" is specified, the specified "crashkernel=Y,low"
> memory is not required in the following corner cases:
> 1. If both CONFIG_ZONE_DMA and CONFIG_ZONE_DMA32 are disabled, it means
> that the devices can access any memory.
> 2. If the system memory is small, the crash high memory may be allocated
> from the DMA zones. If that happens, there's no need to allocate
> another crash low memory because there's already one.
>
> [...]
Applied to arm64 (for-next/crashkernel), thanks!
[1/1] arm64: kdump: Do not allocate crash low memory if not needed
https://git.kernel.org/arm64/c/8f0f104e2ab6
--
Catalin
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