[Qemu-devel] [Bug 1762707] Re: VFIO device gets DMA failures when virtio-balloon leak from highmem to lowmem
I think we can raise this issue to libvirt. When using virsh or virt- manager, the memory balloon is still enabled by default even if there's a device assignment. -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1762707 Title: VFIO device gets DMA failures when virtio-balloon leak from highmem to lowmem Status in QEMU: Invalid Bug description: Is there any known conflict between VFIO passthrough device and virtio-balloon? The VM has: 1. 4GB system memory 2. one VFIO passthrough device which supports high address memory DMA and uses GFP_HIGHUSER pages. 3. Memory balloon device with 4GB target. When setting the memory balloon target to 1GB and 4GB in loop during runtime (I used the command "virsh qemu-monitor-command debian --hmp --cmd balloon 1024"), the VFIO device DMA randomly gets failure. More clues: 1. configure 2GB system memory (no highmem) VM, no issue with similar operations 2. setting the memory balloon to higher like 8GB, no issue with similar operations I'm also trying to narrow down this issue. It's appreciated for that you guys may share some thoughts. To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1762707/+subscriptions
[Qemu-devel] [Bug 1762707] Re: VFIO device gets DMA failures when virtio-balloon leak from highmem to lowmem
Hi Alex, Thanks for your confirming. change the status to invalid. ** Changed in: qemu Status: New => Invalid -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1762707 Title: VFIO device gets DMA failures when virtio-balloon leak from highmem to lowmem Status in QEMU: Invalid Bug description: Is there any known conflict between VFIO passthrough device and virtio-balloon? The VM has: 1. 4GB system memory 2. one VFIO passthrough device which supports high address memory DMA and uses GFP_HIGHUSER pages. 3. Memory balloon device with 4GB target. When setting the memory balloon target to 1GB and 4GB in loop during runtime (I used the command "virsh qemu-monitor-command debian --hmp --cmd balloon 1024"), the VFIO device DMA randomly gets failure. More clues: 1. configure 2GB system memory (no highmem) VM, no issue with similar operations 2. setting the memory balloon to higher like 8GB, no issue with similar operations I'm also trying to narrow down this issue. It's appreciated for that you guys may share some thoughts. To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1762707/+subscriptions
[Qemu-devel] [Bug 1762707] [NEW] VFIO device gets DMA failures when virtio-balloon leak from highmem to lowmem
Public bug reported: Is there any known conflict between VFIO passthrough device and virtio- balloon? The VM has: 1. 4GB system memory 2. one VFIO passthrough device which supports high address memory DMA and uses GFP_HIGHUSER pages. 3. Memory balloon device with 4GB target. When setting the memory balloon target to 1GB and 4GB in loop during runtime (I used the command "virsh qemu-monitor-command debian --hmp --cmd balloon 1024"), the VFIO device DMA randomly gets failure. More clues: 1. configure 2GB system memory (no highmem) VM, no issue with similar operations 2. setting the memory balloon to higher like 8GB, no issue with similar operations I'm also trying to narrow down this issue. It's appreciated for that you guys may share some thoughts. ** Affects: qemu Importance: Undecided Status: New -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1762707 Title: VFIO device gets DMA failures when virtio-balloon leak from highmem to lowmem Status in QEMU: New Bug description: Is there any known conflict between VFIO passthrough device and virtio-balloon? The VM has: 1. 4GB system memory 2. one VFIO passthrough device which supports high address memory DMA and uses GFP_HIGHUSER pages. 3. Memory balloon device with 4GB target. When setting the memory balloon target to 1GB and 4GB in loop during runtime (I used the command "virsh qemu-monitor-command debian --hmp --cmd balloon 1024"), the VFIO device DMA randomly gets failure. More clues: 1. configure 2GB system memory (no highmem) VM, no issue with similar operations 2. setting the memory balloon to higher like 8GB, no issue with similar operations I'm also trying to narrow down this issue. It's appreciated for that you guys may share some thoughts. To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1762707/+subscriptions
