Public bug reported: [impact]
the impact is the same as bug 1886704, the qemu vhost-user driver fails to init. see that bug for more details on the impact. [test case] start a qemu guest with at least one vhost-user interface, and more than 8 discontiguous memory regions. The vhost-user device will fail to init due to exceeding its max memory region limit. [regression potential] as this causes vhost-user to ignore some mem regions, any regression would likely involve problems with the vhost-user interface; possibly failure to init the interface, or failure to configure the interface, or problems while using the interface. [scope] TBD [other info] this is closely related to bug 1886704, but that bug is specifically about the 8 mem region limit of the vhost-user api. This bug doesn't attempt to fix that limitation (as it requires using a new extension of the vhost-user api to increase the max mem regions), this only backports existing upstream patches that fix the vhost region calculations and allow the vhost-user driver to indicate which mem regions it doesn't need to use, so those are ignored, in order to keep the total under the vhost-user limit. ** Affects: qemu (Ubuntu) Importance: Undecided Status: Fix Released ** Affects: qemu (Ubuntu Bionic) Importance: Medium Assignee: Dan Streetman (ddstreet) Status: In Progress ** Also affects: qemu (Ubuntu Bionic) Importance: Undecided Status: New ** Changed in: qemu (Ubuntu Bionic) Assignee: (unassigned) => Dan Streetman (ddstreet) ** Changed in: qemu (Ubuntu Bionic) Importance: Undecided => Medium ** Changed in: qemu (Ubuntu Bionic) Status: New => In Progress ** Changed in: qemu (Ubuntu) Status: New => Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1887525 Title: qemu vhost-user should ignore irrelevant mem regions because it has limit of 8 regions To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/1887525/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs