Messages in this thread | | | Date | Mon, 25 May 2020 14:43:22 -0700 | From | Andrew Morton <> | Subject | Re: [PATCH v6 2/4] mm/memory.c: Update local TLB if PTE entry exists |
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On Mon, 25 May 2020 10:52:38 +0800 Bibo Mao <maobibo@loongson.cn> 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@linux-foundation.org>
Thanks for persisting with these.
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