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[99.254.144.39]) by smtp.gmail.com with ESMTPSA id o11-20020ae9f50b000000b007675bef6b0dsm635112qkg.118.2023.07.06.04.53.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 06 Jul 2023 04:53:50 -0700 (PDT) Date: Thu, 6 Jul 2023 07:53:49 -0400 From: Peter Xu To: Laszlo Ersek Cc: qemu-devel@nongnu.org, Daniel P =?utf-8?B?LiBCZXJyYW5nw6k=?= , Leonardo Bras Soares Passos , Juan Quintela Subject: Re: [PATCH] docs/migration: Update postcopy bits Message-ID: References: <20230627200222.557529-1-peterx@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: Received-SPF: pass client-ip=170.10.133.124; envelope-from=peterx@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On Thu, Jul 06, 2023 at 12:15:47PM +0200, Laszlo Ersek wrote: > One suggestion, to squash in: > > diff --git a/docs/devel/migration.rst b/docs/devel/migration.rst > index 6f65c23b47dc..3294679936b2 100644 > --- a/docs/devel/migration.rst > +++ b/docs/devel/migration.rst > @@ -594,8 +594,7 @@ Postcopy > 'Postcopy' migration is a way to deal with migrations that refuse to converge > (or take too long to converge) its plus side is that there is an upper bound on > the amount of migration traffic and time it takes, the down side is that during > -the postcopy phase, a failure of *either* side or the network connection causes > -the guest to be lost. > +the postcopy phase, a failure of *either* side causes the guest to be lost. > > In postcopy the destination CPUs are started before all the memory has been > transferred, and accesses to pages that are yet to be transferred cause > > This removes "or the network connection" as a fatal failure. Makes sense. > > Acked-by: Laszlo Ersek Thanks! -- Peter Xu