linux-kernel - Re: [PATCH v3 1/1] selftests/mm: skip soft-dirty tests when CONFIG_MEM_SOFT

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Message-Id: <20250917153046.b781f65ea9a54875f4ddd02e@linux-foundation.org>
Date: Wed, 17 Sep 2025 15:30:46 -0700
From: Andrew Morton <akpm@...ux-foundation.org>
To: Lance Yang <lance.yang@...ux.dev>
Cc: david@...hat.com, lorenzo.stoakes@...cle.com, shuah@...nel.org,
 ioworker0@...il.com, linux-kernel@...r.kernel.org, linux-mm@...ck.org,
 linux-kselftest@...r.kernel.org
Subject: Re: [PATCH v3 1/1] selftests/mm: skip soft-dirty tests when
 CONFIG_MEM_SOFT_DIRTY is disabled

On Wed, 17 Sep 2025 21:31:37 +0800 Lance Yang <lance.yang@...ux.dev> 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?