Re: [PATCH v15 0/8] arm64: add ARCH_HAS_COPY_MC support

On Thu, Jun 18, 2026 at 05:21:14PM +0800, Ruidong Tian wrote:

This series continues Tong Tiangen's work on arm64 ARCH_HAS_COPY_MC
support. We encounter the same problem, and from a forward-looking
perspective, large-memory ARM machines will suffer more from this class
of issues, which motivates us to push this feature upstream.

Problem
=========
With the increase of memory capacity and density, the probability of memory
error also increases. The increasing size and density of server RAM in data
centers and clouds have shown increased uncorrectable memory errors.

Currently, more and more scenarios that can tolerate memory errors, such as
COW[1,2,8,9], KSM copy[3], coredump copy[4], khugepaged[5,6], uaccess copy[7],
page migration[10,11], etc.

Hi Ruidong,


just a minor editorial nit :-)

[PATCH v15 0/8] arm64: add ARCH_HAS_COPY_MC support

the series has 9 patches, but Subject says 0/8.

Cheers,
Ashok