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    SubjectRe: [PATCH 4/9] x86/mm/tlb: Flush remote and local TLBs concurrently
    Date
    > On Jun 25, 2019, at 8:36 PM, Andy Lutomirski <luto@kernel.org> wrote:
    >
    > On Wed, Jun 12, 2019 at 11:49 PM Nadav Amit <namit@vmware.com> wrote:
    >> To improve TLB shootdown performance, flush the remote and local TLBs
    >> concurrently. Introduce flush_tlb_multi() that does so. The current
    >> flush_tlb_others() interface is kept, since paravirtual interfaces need
    >> to be adapted first before it can be removed. This is left for future
    >> work. In such PV environments, TLB flushes are not performed, at this
    >> time, concurrently.
    >
    > Would it be straightforward to have a default PV flush_tlb_multi()
    > that uses flush_tlb_others() under the hood?

    I prefer not to have a default PV implementation that should anyhow go away.

    I can create unoptimized untested versions for Xen and Hyper-V, if you want.

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