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

[Alessio Faina]

On Tue, Sep 30, 2025 at 11:35:30AM +0800, AceLan Kao wrote:
> From: "Chia-Lin Kao (AceLan)" <acelan.kao at canonical.com>
> 
> BugLink: https://bugs.launchpad.net/ubuntu/bugs/2103680
> 
> [Impact]
> While running the memory stress test, the system becomes unresponsive.
> 
> [Fix]
> The commit from linux-next fixes the issue
> 4a077b6dd4a4 mm: page_alloc: avoid kswapd thrashing due to NUMA restrictions
> 
> [Test]
> Run the following command on the machine with kernel version greater or
> equal to v6.11
>    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(+)
> 
> -- 
> 2.43.0
> 
> 
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v2 submitted