Re: [PATCH 2/2] arm64: Reduce PT size estimation complexity

Tom Rini
2023-03-07T17:53:33Z

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On Tue, Feb 14, 2023 at 09:38:14PM +0800, Ying-Chun Liu (PaulLiu) wrote:

> From: Marc Zyngier <maz@kernel.org>
>
> count_required_pts()'s complexity is high if mappings are not using the
> largest possible block size (due to some other requirement such as tracking
> dirty pages, for example).
>
> Let's switch to a method that follows the pattern established with
> the add_map() helper, and make it almost instantaneous instead of
> taking a large amount of time if 2MB mappings are in use instead of
> 1GB.
>
> Signed-off-by: Marc Zyngier <maz@kernel.org>
> Signed-off-by: Pierre-Clément Tosi <ptosi@google.com>
> [ Paul: pick from the Android tree. Fixup Pierre's commit. Rebase to the
> upstream ]
> Signed-off-by: Ying-Chun Liu (PaulLiu) <paul.liu@linaro.org>
> Cc: Tom Rini <trini@konsulko.com>
> Link: https://android.googlesource.com/platform/external/u-boot/+/5d756d147e31a1cdaaa261a50e526404ca5968f5
> Link: https://android.googlesource.com/platform/external/u-boot/+/6be9330601d81545c7c941e3609f35bf68a09059

Applied to u-boot/next, thanks!

--
Tom

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