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SubjectRe: [PATCH v7 8/8] x86/tlb: just do tlb flush on one of siblings of SMT
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> As my limited knowledge, rewrite cr3 or invlpg will flush all levels TLB
> entries in CPU. So, what's you mean of 'HAVE to flush all'?

neither of these will flush global tlb entries.

(see the "global" bit in the page table format)




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