On Tue, 14 Feb 2017 19:41:17 +0530 "Aneesh Kumar K.V" <[email protected]> wrote:
> "Aneesh Kumar K.V" <[email protected]> writes: > > > Architectures like ppc64, use privilege access bit to mark pte non > > accessible. > > This implies that kernel can do a copy_to_user to an address marked for > > numa fault. > > This also implies that there can be a parallel hardware update for the pte. > > set_pte_at cannot be used in such scenarios. Hence switch the pte > > update to use ptep_get_and_clear and set_pte_at combination. > > > > Signed-off-by: Aneesh Kumar K.V <[email protected]> > > With this and other patches a kvm guest is giving me > > ... > > Reverting this patch gets rid of the above hang. But I am running into > segfault > with systemd in guest. It could be some other patches in my local tree. > > Maybe we should hold merging this to 4.11 and wait for this to get more > testing ? Shall do. Please let me know the outcome...
