On Wed, 03 Apr 2024 14:06:09 +0530, Aneesh Kumar K.V (IBM) wrote:
> The value specified for the memory limit is used to set a restriction on
> memory usage. It is important to ensure that this restriction is within
> the linear map kernel address space range. The hash page table
> translation uses a 16MB page size to map the kernel linear map address
> space. htab_bolt_mapping() function aligns down the size of the range
> while mapping kernel linear address space. Since the memblock limit is
> enforced very early during boot, before we can detect the type of memory
> translation (radix vs hash), we align the memory limit value specified
> as a kernel parameter to 16MB. This alignment value will work for both
> hash and radix translations.
>
> [...]
Applied to powerpc/next.
[1/3] powerpc/mm: Align memory_limit value specified using mem= kernel parameter
https://git.kernel.org/powerpc/c/5ca096161cdccfa328acf6704a4615528471d309
[2/3] powerpc/fadump: Don't update the user-specified memory limit
https://git.kernel.org/powerpc/c/f94f5ac07983cb53de0c964f5428366c19e81993
[3/3] powerpc/mm: Update the memory limit based on direct mapping restrictions
https://git.kernel.org/powerpc/c/5a799af9522641517f6d871d9f56e2658ee7db58
cheers
