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Thu, 06 Feb 2020 13:24:34 -0800 (PST) Date: Thu, 6 Feb 2020 16:24:31 -0500 From: Peter Xu To: Sean Christopherson Cc: Paolo Bonzini , Paul Mackerras , Christian Borntraeger , Janosch Frank , David Hildenbrand , Cornelia Huck , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Joerg Roedel , Marc Zyngier , James Morse , Julien Thierry , Suzuki K Poulose , linux-mips@vger.kernel.org, kvm@vger.kernel.org, kvm-ppc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, linux-kernel@vger.kernel.org, Christoffer Dall , Philippe =?utf-8?Q?Mathieu-Daud=C3=A9?= Subject: Re: [PATCH v5 15/19] KVM: Provide common implementation for generic dirty log functions Message-ID: <20200206212431.GF700495@xz-x1> References: <20200121223157.15263-1-sean.j.christopherson@intel.com> <20200121223157.15263-16-sean.j.christopherson@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20200121223157.15263-16-sean.j.christopherson@intel.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jan 21, 2020 at 02:31:53PM -0800, Sean Christopherson wrote: [...] > @@ -1333,6 +1369,7 @@ int kvm_clear_dirty_log_protect(struct kvm *kvm, > unsigned long i, n; > unsigned long *dirty_bitmap; > unsigned long *dirty_bitmap_buffer; > + bool flush; > > as_id = log->slot >> 16; > id = (u16)log->slot; > @@ -1356,7 +1393,9 @@ int kvm_clear_dirty_log_protect(struct kvm *kvm, > (log->num_pages < memslot->npages - log->first_page && (log->num_pages & 63))) > return -EINVAL; > > - *flush = false; > + kvm_arch_sync_dirty_log(kvm, memslot); Do we need this even for clear dirty log? > + > + flush = false; > dirty_bitmap_buffer = kvm_second_dirty_bitmap(memslot); > if (copy_from_user(dirty_bitmap_buffer, log->dirty_bitmap, n)) > return -EFAULT; -- Peter Xu