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Diffstat (limited to 'results/scraper/launchpad-without-comments/1762707')
| -rw-r--r-- | results/scraper/launchpad-without-comments/1762707 | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/results/scraper/launchpad-without-comments/1762707 b/results/scraper/launchpad-without-comments/1762707 new file mode 100644 index 00000000..898806ee --- /dev/null +++ b/results/scraper/launchpad-without-comments/1762707 @@ -0,0 +1,16 @@ +VFIO device gets DMA failures when virtio-balloon leak from highmem to lowmem + +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. \ No newline at end of file |