Re: [PATCH v3 0/3] Speed up boot with faster linear map creation

[Will Deacon]

On Fri, 12 Apr 2024 14:19:05 +0100, Ryan Roberts wrote:
> It turns out that creating the linear map can take a significant proportion of
> the total boot time, especially when rodata=full. And most of the time is spent
> waiting on superfluous tlb invalidation and memory barriers. This series reworks
> the kernel pgtable generation code to significantly reduce the number of those
> TLBIs, ISBs and DSBs. See each patch for details.
> 
> The below shows the execution time of map_mem() across a couple of different
> systems with different RAM configurations. We measure after applying each patch
> and show the improvement relative to base (v6.9-rc2):
> 
> [...]

Applied to arm64 (for-next/mm), thanks!

[1/3] arm64: mm: Don't remap pgtables per-cont(pte|pmd) block
      https://git.kernel.org/arm64/c/5c63db59c5f8
[2/3] arm64: mm: Batch dsb and isb when populating pgtables
      https://git.kernel.org/arm64/c/1fcb7cea8a5f
[3/3] arm64: mm: Don't remap pgtables for allocate vs populate
      https://git.kernel.org/arm64/c/0e9df1c905d8

Cheers,
-- 
Will

https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev