Unnamed repository; edit this file 'description' to name the repository. https://gitea.privatedns.org/xavi/android_kernel_m2note/atom?h=ng-7.1.2 2017-07-04T10:11:11+00:00 2017-07-04T10:11:11+00:00 Ladi Prosek lprosek@redhat.com 2017-03-23T07:04:18+00:00 urn:sha1:c3415a82177e492bd28a0e9f1d939eb2da161f48 commit fc8653228c8588a120f6b5dad6983b7b61ff669e upstream. When init_vqs runs, virtio_balloon.stats is either uninitialized or contains stale values. The host updates its state with garbage data because it has no way of knowing that this is just a marker buffer used for signaling. This patch updates the stats before pushing the initial buffer. Alternative fixes: * Push an empty buffer in init_vqs. Not easily done with the current virtio implementation and violates the spec "Driver MUST supply the same subset of statistics in all buffers submitted to the statsq". * Push a buffer with invalid tags in init_vqs. Violates the same spec clause, plus "invalid tag" is not really defined. Note: the spec says: When using the legacy interface, the device SHOULD ignore all values in the first buffer in the statsq supplied by the driver after device initialization. Note: Historically, drivers supplied an uninitialized buffer in the first buffer. Unfortunately QEMU does not seem to implement the recommendation even for the legacy interface. Signed-off-by: Ladi Prosek <lprosek@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Willy Tarreau <w@1wt.eu> 2016-09-09T22:45:11+00:00 Jan Engelmohr jan.engelmohr@mailbox.tu-dresden.de 2016-09-04T14:45:09+00:00 urn:sha1:0a1e8e11acd3cc36b1d65023ce1cb1a06a887b11 2016-08-15T02:19:42+00:00 Meizu OpenSource patchwork@meizu.com 2016-08-15T02:19:42+00:00 urn:sha1:d2e1446d81725c351dc73a03b397ce043fb18452