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([2001:b07:6468:f312:c8dd:75d4:99ab:290a]) by smtp.gmail.com with ESMTPSA id d1sm14223774eje.26.2021.04.08.05.46.08 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 08 Apr 2021 05:46:09 -0700 (PDT) Subject: Re: [PATCH 0/2] i386: Fix interrupt based Async PF enablement To: Vitaly Kuznetsov , qemu-devel@nongnu.org References: <20210401151957.408028-1-vkuznets@redhat.com> <87sg43d4gk.fsf@vitty.brq.redhat.com> From: Paolo Bonzini Message-ID: <091dec53-cc0c-04ca-154a-3cfab6475705@redhat.com> Date: Thu, 8 Apr 2021 14:46:08 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.7.0 MIME-Version: 1.0 In-Reply-To: <87sg43d4gk.fsf@vitty.brq.redhat.com> Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=pbonzini@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=216.205.24.124; envelope-from=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 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, NICE_REPLY_A=-0.001, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Richard Henderson , Eduardo Habkost , "Dr . David Alan Gilbert" , "Michael S. Tsirkin" Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 06/04/21 13:42, Vitaly Kuznetsov wrote: > older machine types are still available (I disable it for <= 5.1 but we > can consider disabling it for 5.2 too). The feature is upstream since > Linux 5.8, I know that QEMU supports much older kernels but this doesn't > probably mean that we can't enable new KVM PV features unless all > supported kernels have it, we'd have to wait many years otherwise. Yes, this is a known problem in fact. :( In 6.0 we even support RHEL 7, though that will go away in 6.1. We should take the occasion of dropping RHEL7 to be clearer about which kernels are supported. Paolo