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b=S7BZ85SpmMe/TsN7qnasvC8k65CY7HUPludV85SpdYakckv3D8i4jBHVTu3tIl5jX fBv636fqralFr4wXMpXiYGK0PLbNL5CBQFafJQwvINPJo04eWF3eB2+cQm4pFIxvdO ubS1pyJni4taRnzemaTHqKQlTfH9NTHD3vE+XTrs= X-UI-Sender-Class: c548c8c5-30a9-4db5-a2e7-cb6cb037b8f9 Received: from luklap ([87.123.206.73]) by smtp.web.de (mrweb002 [213.165.67.108]) with ESMTPSA (Nemesis) id 0LtFAh-1iwNaT0gY7-012nJN; Sat, 06 Jun 2020 21:30:50 +0200 Date: Sat, 6 Jun 2020 21:30:38 +0200 From: Lukas Straub To: qemu-devel Subject: Re: [PATCH v4 0/4] Introduce 'yank' oob qmp command to recover from hanging qemu Message-ID: <20200606213038.43538439@luklap> In-Reply-To: References: MIME-Version: 1.0 Content-Type: multipart/signed; boundary="Sig_/rH/=5XBjEGqnFs1leRxwi5B"; protocol="application/pgp-signature"; micalg=pgp-sha512 X-Provags-ID: V03:K1:8ZCICRB+4qwNZiSJsnjnouQBNg2774xWPGhem/kc1DKTFvSQGmA w0dYVAeAvoPjBfeM9ojAm/8Ac2MlLmsko8YX1pI96KpMqbJLwydth9AgNXXWYvbu3JXZM6V BwslrmrkftCbw3OXNwNq32eZrD6DFg5JsevaqUSsH0IiSJSi6SRzmGpWEACnyZmlEye1/v6 VuhrN/ERe+KAkWPGjUdlg== X-UI-Out-Filterresults: notjunk:1;V03:K0:l7BpF6YFkxA=:DaBjC9o/LXtaaFRDNuRiYI h2Cq86YFnZ2NGd1ZO7f6rkpZ4nnx5aqhfGmqPgiv/zA+cRqpIaypDDUQ97R765KgT/pSQROgM gUwCt3VjsTG/f1j78VGmZNQF2BxAepSMhVvbwtMeLrC2WU/6Jf+tC5gaPsRXOhe4uUZYc1Dgc fL71wxDI8LbYqSFP8c6rfTty/sUE2LlNHacXTZws6ZOpBRL8CzYS/XTM7l9qo9wY5PoIVNUwj aolkKm6gtFs4vsfQO0qronavX1kW5wXlHyRbJMOy0grcRnJx0aXFKTkfNVcNMU91ql6boTjq9 dsvzdQuq1o7WRmIFQffLHNlTHcXWOGIo+td/PhaC6UtDSfNxw+4koCOLSp/HUkKMd5APoeWbv r6gvNAgckOudE0xV8orf+c4PTuzCYre0H8jdvj3TzT5+pojrQZhSIttLdzbTjU4A+56gBrNyJ em9SuRDX47o8J9AUsIHPIlRV7jpe/gYVHBwe/WCJGnBdD2pqUFa9HbRVFDhCOp48DlPFugcDj 0kzyU66q8ING+rD11k5rfdBXl1aEJPs7cJxtFltG7agpznU/QpTNUfUPxP1ps3HCheSOpePO6 Vi44qGSaaRr2jpmduPzkFA3LorJyhgpZxX1Ei5TbdrRks/51fFeIqEnS+5YDEmh5sW7sTkBDR AfxXKzTuUNwJ/oM91CGBVKBOMNwVjYIzT9LuYClJIaWtoEGhwz0ezBI5ew3XRxGjNaw0Famia 7KvqX72m5WkPewdl6Zlq6CyK/bjVChaaeY9CaOrO3G4tsJ5qHYePEwe3BkwzhIMb+GI42Tr26 Wx7MyZ6ZJCM4GEXzkOYkeezoDQYqgwp0ZnxIUCkYr7Og2XqdK85rJzUxO4QxcZXuLmNOPfUYV IJbuLF2A+WpA2c24TNUDyy6CevuHifOfz0gBe0y0aCetoxfOKUV1DMqRt2MNcTRmdjhOdxbEn RS+BZApCd9mr9Dro0udk4JVucNtv623/Q/+yIRg5bmoSpANA0eRWsFtEI7lcUREXSYe8k3FHF FFhrqUMQH145e04fCTbbZdyWZHW4/fatsHbASl2rx1TETLhO9nntkPIEBpKhrZJeA57LCeDvg 3bIY2LNwu2Jtr91GY5XG8cc9Ifj1a4RzoDUeeHMJI0Hq2FeGdEaJ6wJGhyR+5Sw0SthN5uQ5j HtkKoyraXhofY8+7itgNODNlRjrkOdkzZ/ZCXlh7eQ8IpqsuexV27jKptBM1Wqg4i9VFWUVxP 9OiGjivDCNo+ZPT9M Received-SPF: pass client-ip=212.227.15.3; envelope-from=lukasstraub2@web.de; helo=mout.web.de X-detected-operating-system: by eggs.gnu.org: First seen = 2020/06/06 15:17:41 X-ACL-Warn: Detected OS = Linux 3.11 and newer X-Spam_score_int: -24 X-Spam_score: -2.5 X-Spam_bar: -- X-Spam_report: (-2.5 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_ENVFROM_END_DIGIT=0.25, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_PASS=-0.001 autolearn=_AUTOLEARN 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: Kevin Wolf , "Daniel P. =?UTF-8?B?QmVycmFuZ8Op?=" , qemu-block , Juan Quintela , "Dr. David Alan Gilbert" , Max Reitz , Paolo Bonzini , =?UTF-8?B?TWFyYy1BbmRy?= =?UTF-8?B?w6k=?= Lureau Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" --Sig_/rH/=5XBjEGqnFs1leRxwi5B Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Mon, 25 May 2020 17:44:12 +0200 Lukas Straub wrote: > Hello Everyone, > In many cases, if qemu has a network connection (qmp, migration, chardev,= etc.) > to some other server and that server dies or hangs, qemu hangs too. > These patches introduce the new 'yank' out-of-band qmp command to recover= from > these kinds of hangs. The different subsystems register callbacks which g= et > executed with the yank command. For example the callback can shutdown() a > socket. This is intended for the colo use-case, but it can be used for ot= her > things too of course. >=20 > Regards, > Lukas Straub Hello Everyone, Can this be reviewed, it would be cool to have this in qemu 5.1. 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