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

[Alessio Faina]

On Tue, Sep 30, 2025 at 01:02:39PM +0800, 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(+)
> 
> -- 
> 2.43.0
> 
> 
> -- 
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I've noticed you uploaded a patch for Q as well with the same content,
it would be better if you could use the flat hierarchy including all the
patches like the following one:

[PATCH v2 0/1][SRU][N/P/Q] System hangs when running the memory stress test
    [PATCH v2 1/1][SRU][N/P] mm: page_alloc: avoid kswapd thrashing due to NUMA restrictions
		[PATCH v2 1/1][SRU][Q] mm: page_alloc: avoid kswapd thrashing due to NUMA restrictions

-- 
Alessio Faina