Public bug reported: virtio-blk disks can go dissfunctional when swiotlb fills up For example, with a PV guest choose a small swiotlb (30MB) and create IO load on several virtio-blk disks simultaneously. It actually should not matter what causes the swiotlb pressure (can be virtio-net as well). Fixes posted upstream: https://lkml.org/lkml/2020/2/13/306
We will need backports to support Protected Virtualization. IBM verified that the patches apply cleanly on focal/master-next, upstream commit ids for reference: commit bab7e6f05699a481787f7659c4f766dd87187dae Author: Halil Pasic <[email protected]> Date: Thu Feb 13 13:37:27 2020 +0100 virtio-blk: fix hw_queue stopped on arbitrary error commit 24506976aec92052e9fe328146a2e574a1190986 Author: Halil Pasic <[email protected]> Date: Thu Feb 13 13:37:28 2020 +0100 virtio-blk: improve virtqueue error to BLK_STS Also applies cleanly on 19.10..... ** Affects: linux (Ubuntu) Importance: Undecided Assignee: Ubuntu on IBM Power Systems Bug Triage (ubuntu-power-triage) Status: New ** Tags: architecture-all bugnameltc-184224 severity-critical targetmilestone-inin2004 ** Tags added: architecture-all bugnameltc-184224 severity-critical targetmilestone-inin2004 ** Changed in: ubuntu Assignee: (unassigned) => Ubuntu on IBM Power Systems Bug Triage (ubuntu-power-triage) ** Package changed: ubuntu => linux (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1867109 Title: [UBUNTU 20.04] virtio-blk hw queue gets possibly permanently stopped when swiotlb full To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1867109/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
