Re: [PATCH v3 1/1] selftests/mm: skip soft-dirty tests when CONFIG_MEM_SOFT_DIRTY is disabled

From: Lance Yang
Date: Wed Sep 17 2025 - 21:42:15 EST




On 2025/9/18 06:30, Andrew Morton wrote:
On Wed, 17 Sep 2025 21:31:37 +0800 Lance Yang <lance.yang@xxxxxxxxx> wrote:

The madv_populate and soft-dirty kselftests currently fail on systems where
CONFIG_MEM_SOFT_DIRTY is disabled.

Introduce a new helper softdirty_supported() into vm_util.c/h to ensure
tests are properly skipped when the feature is not enabled.

It's pretty sad for us to ship kernels which have known selftest flaws
like this.

would

Fixes: 9f3265db6ae8 ("selftests: vm: add test for Soft-Dirty PTE bit")

be appropriate?

Yes. Thanks for providing the Fixes: tag!