Re: [PATCH v1 4/4] mm/hugetlb: fix excessive IPI broadcasts when unsharing PMD tables using mmu_gather

[Nadav Amit]

> On 5 Dec 2025, at 23:35, David Hildenbrand (Red Hat) <david@xxxxxxxxxx> wrote:
> 
> @@ -400,6 +411,7 @@ static inline void __tlb_reset_range(struct mmu_gather *tlb)
> 	tlb->cleared_pmds = 0;
> 	tlb->cleared_puds = 0;
> 	tlb->cleared_p4ds = 0;
> +	tlb->unshared_tables = 0;
> 	/*
> 	 * Do not reset mmu_gather::vma_* fields here, we do not
> 	 * call into tlb_start_vma() again to set them if there is an

I understand you don’t want to initialize fully_unshared_tables here, but
tlb_gather_mmu() needs to happen somewhere. So you probably want it to
take place in tlb_gather_mmu(), no?