On Sun, 2015-03-29 at 22:16 +0530, Aneesh Kumar K.V wrote: > Michael Ellerman <m...@ellerman.id.au> writes: > > > On Thu, 2015-26-03 at 13:13:39 UTC, "Aneesh Kumar K.V" wrote: > >> pte can get updated from other CPUs as part of multiple activities > >> like THP split, huge page collapse, unmap. We need to make sure we > >> don't reload the pte value again and again for different checks. > >> > >> --- > >> arch/powerpc/include/asm/kvm_book3s_64.h | 5 ++++- > >> arch/powerpc/kvm/e500_mmu_host.c | 20 ++++++++++++-------- > >> 2 files changed, 16 insertions(+), 9 deletions(-) > > > > So this series is partly KVM but mostly powerpc. > > > > I assume you can't split it into two separate series easily? > > Yes, will do. But before that I was looking for feedback from Ben or > Paul. > > > > > You haven't sent it to the KVM lists or to Alex AFAICS. You'll need to do > > that > > for the KVM pieces at least. We can probably take it all via powerpc, but > > I'll > > need an ACK from Alex at least. > > > > If I can get an ack from Ben, that makes it easy for the kvm list.
Ack. Using ACCESS_ONCE in a lockless access of the PTE that does multiple checks makes sense. Cheers, Ben. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
