Messages in this thread | | | Date | Tue, 7 Feb 2023 18:21:20 +0000 | From | Catalin Marinas <> | Subject | Re: [RFC PATCH 1/1] arm64: mm: remove unnecessary multiple tlb flush of contiguous hugetlb |
| |
On Tue, Feb 07, 2023 at 07:09:41PM +0800, Kaihao Bai wrote: > In arm64, contiguous flag refers to the same TLB entry that shared by a > contiguous address range. If flush one entry of the address range, it > would cover the whole contiguous address range. Thus there's no need to > flush all contiguous range that CONT_PMD/PTE points to.
This doesn't work. The contiguous bit is a hint, so the CPU may not coalesce multiple PTEs into a single TLB entry.
-- Catalin
| |