On Mon, 01 Jul 2024 18:30:21 +0530, Hari Bathini wrote:
> When KFENCE is enabled, total system memory is mapped at page level
> granularity. But in radix MMU mode, ~3GB additional memory is needed
> to map 100GB of system memory at page level granularity when compared
> to using 2MB direct mapping. This is not desired considering KFENCE is
> designed to be enabled in production kernels [1]. Also, mapping only
> the memory allocated for KFENCE pool at page granularity is sufficient
> to enable KFENCE support. So, allocate __kfence_pool during bootup and
> map it at page granularity instead of mapping all system memory at
> page granularity.
>
> [...]
Applied to powerpc/next.
[1/1] radix/kfence: map __kfence_pool at page granularity
https://git.kernel.org/powerpc/c/353d7a84c214f184d5a6b62acdec8b4424159b7c
cheers
