APPLIED: [PATCH v2 0/1][SRU][N/P] System hangs when running the memory stress test

[Edoardo Canepa]

Applied to noble,plucky:linux/master-next. Thanks.

On 9/30/25 07:02, AceLan Kao wrote:
> From: "Chia-Lin Kao (AceLan)" <acelan.kao at canonical.com>
>
> BugLink: https://bugs.launchpad.net/bugs/2103680
>
> [Impact]
> While running the memory stress test, the system becomes unresponsive.
>
> [Fix]
> The commit from linux-next fixes the issue
> 19c5fb83f2a4 mm: page_alloc: avoid kswapd thrashing due to NUMA restrictions
>
> [Test]
> Run the following command on the machine
>     sudo stress-ng --aggressive --verify --timeout 300 --mmapmany 0
> It should finish the test in 5mins.
>
> [Where problems could occur]
> Given that the patch was reviewed and tested by multiple experienced
> kernel developers, the likelihood of it causing a noticeable regression is
> very low. It is far more likely to improve performance and stability on
> NUMA systems under the conditions described in the commit message.
>
> Johannes Weiner (1):
>    mm: page_alloc: avoid kswapd thrashing due to NUMA restrictions
>
>   mm/page_alloc.c | 24 ++++++++++++++++++++++++
>   1 file changed, 24 insertions(+)
>
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