Re: [Regression] mm:slab/sheaves: severe performance regression in cross-CPU slab allocation

[Vlastimil Babka (SUSE)]

On 2/24/26 21:27, Vlastimil Babka wrote:
> 
> It made sense to me not to refill sheaves when we can't reclaim, but I
> didn't anticipate this interaction with mempools. We could change them
> but there might be others using a similar pattern. Maybe it would be for
> the best to just drop that heuristic from __pcs_replace_empty_main()
> (but carefully as some deadlock avoidance depends on it, we might need
> to e.g. replace it with gfpflags_allow_spinning()). I'll send a patch
> tomorrow to test this theory, unless someone beats me to it (feel free to).
Could you try this then, please? Thanks!

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