On Mon, 25 May 2020 10:52:38 +0800 Bibo Mao <maobibo@xxxxxxxxxxx> wrote: > If two threads concurrently fault at the same page, the thread that > won the race updates the PTE and its local TLB. For now, the other > thread gives up, simply does nothing, and continues. > > It could happen that this second thread triggers another fault, whereby > it only updates its local TLB while handling the fault. Instead of > triggering another fault, let's directly update the local TLB of the > second thread. Function update_mmu_tlb is used here to update local > TLB on the second thread, and it is defined as empty on other arches. Acked-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Thanks for persisting with these.
