Hi,
This small series disables KSM (Kernel Samepage Merging) in the Morello defconfig, as it is currently unsafe in the presence of tags - see patch 1 for details. To guarantee correctness even if it is manually enabled, patch 2 forces memcmp_pages() to report a difference.
It is quite possible that KSM would still be worthwhile even with the extra cost of comparing tags. Issue #62 [1] covers that investigation.
Review branch:
https://git.morello-project.org/kbrodsky-arm/linux/-/commits/morello/disable...
Cheers, Kevin
[1] https://git.morello-project.org/morello/kernel/linux/-/issues/62
Kevin Brodsky (2): arm64: morello: Disable KSM in defconfig arm64: morello: Make memcmp_pages() always report a difference
.../configs/morello_transitional_pcuabi_defconfig | 1 - arch/arm64/kernel/morello.c | 14 ++++++++++++++ 2 files changed, 14 insertions(+), 1 deletion(-)