** Description changed: 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). - + virtio-blk hw queue gets possibly permanently stopped when swiotlb full + + 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 <pa...@linux.ibm.com> Date: Thu Feb 13 13:37:27 2020 +0100 - virtio-blk: fix hw_queue stopped on arbitrary error - + virtio-blk: fix hw_queue stopped on arbitrary error + commit 24506976aec92052e9fe328146a2e574a1190986 Author: Halil Pasic <pa...@linux.ibm.com> Date: Thu Feb 13 13:37:28 2020 +0100 - virtio-blk: improve virtqueue error to BLK_STS + virtio-blk: improve virtqueue error to BLK_STS Also applies cleanly on 19.10.....
** Summary changed: - [UBUNTU 20.04] virtio-blk hw queue gets possibly permanently stopped when swiotlb full + [UBUNTU 20.04] virtio-blk disks can go dissfunctional when swiotlb fills up -- 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 disks can go dissfunctional when swiotlb fills up To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1867109/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
