Hi Alex, could you help to pick up this patch? since v3.14 kernel can enable numa fault for powerpc. Thx, Fan On Mon, Jan 27, 2014 at 5:11 PM, Alexander Graf <agraf@xxxxxxx> wrote: > > On 21.01.2014, at 10:42, Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxxxxxxx> wrote: > >> Liu Ping Fan <kernelfans@xxxxxxxxx> writes: >> >>> To make sure that on host, the pages marked with _PAGE_NUMA result in a fault >>> when guest access them, we should force the checking when guest uses hypercall >>> to setup hpte. >>> >>> Signed-off-by: Liu Ping Fan <pingfank@xxxxxxxxxxxxxxxxxx> >> >> Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxxxxxxx> >> >> When we mark pte with _PAGE_NUMA we already call mmu_notifier_invalidate_range_start and >> mmu_notifier_invalidate_range_end, which will mark existing guest hpte >> entry as HPTE_V_ABSENT. Now we need to do that when we are inserting new >> guest hpte entries. This patch does that. > > So what happens next? We insert a page into the HTAB without HPTE_V_VALID set, so the guest will fail to use it. If the guest does an H_READ on it it will suddenly turn to V_VALID though? > > I might need a crash course in the use of HPTE_V_ABSENT. > > > Alex > -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
