You have been subscribed to a public bug: 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 -- [UBUNTU 20.04] virtio-blk hw queue gets possibly permanently stopped when swiotlb full https://bugs.launchpad.net/bugs/1867109 You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
