Re: [PATCH 1/3] KVM: PPC: Book3S HV: Fix race in reading change bit when removing HPTE

On Tue, Apr 28, 2015 at 10:36:52AM +0530, Aneesh Kumar K.V wrote: Paul Mackerras pau...@samba.org writes: The reference (R) and change (C) bits in a HPT entry can be set by hardware at any time up until the HPTE is invalidated and the TLB invalidation sequence has completed. This means

[PATCH 1/3] KVM: PPC: Book3S HV: Fix race in reading change bit when removing HPTE

The reference (R) and change (C) bits in a HPT entry can be set by hardware at any time up until the HPTE is invalidated and the TLB invalidation sequence has completed. This means that when removing a HPTE, we need to read the HPTE after the invalidation sequence has completed in order to obtain