Re: [ndctl PATCH] test/btt-stress.sh: add stress test for BTT lane race

On Fri, Apr 24, 2026 at 04:36:31PM -0700, Alison Schofield wrote:
> The btt-check unit test exposed data mismatches during BTT I/O in a
> CI environment, indicating a race in lane acquisition that can lead
> to silent data corruption. The failure was not reliably reproduced
> under typical test conditions.
> 
> Add a targeted stress test that repeatedly writes, reads, and verifies
> data on a BTT namespace while background readers contend for BTT lanes
> and CPU loops increase preemption pressure.
> 
> The test reproduces the race on an unfixed kernel and passes with the
> lane ownership fix applied.

Applied to pending for NDCTL v86
https://github.com/pmem/ndctl/commits/pending/

> 
> Assisted-By: Claude Sonnet 4.5
> Signed-off-by: Alison Schofield <[email protected]>
> ---
>  test/btt-stress.sh | 111 +++++++++++++++++++++++++++++++++++++++++++++
>  test/meson.build   |   2 +
>  2 files changed, 113 insertions(+)

snip