Red Hat Bugzilla – Bug 1017217
Multiple devices of same type can share "resources"
Last modified: 2013-10-10 10:45:25 EDT
Description of problem:
Using the same device multiple times can result in them sharing some "resources", such as I/O port, interrupt or DMA channel. Which can result in them not behaving properly.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Start a windows VM with 4 qxl devices:
"-vga qxl -device qxl -device qxl -device qxl"
2. Look into Device Manager and Display adapters
One of those 4 adapters will have a yellow triangle with exclamation mark
it should work properly.
The error causing the warning is 'Code 12': This device cannot find enough free resources that it can use.
Adding regression as this previously worked properly. At least on qemu-kvm-rhev-0.12.1.2-2.355.el6_4.3.x86_64
*** Bug 1010422 has been marked as a duplicate of this bug. ***
Reproduces. I see it with both 410 and 355 builds, thus no regression.
Most likely your guests are configured in different ways. With four qxl devices you have to set the vram size to 32mb (instead of using the default of 64mb), otherwise the qxl pci bars do not fit into the pci i/o hole. Please double-check.
Yes, you are right. For some reason the configuration between RHEV3.2 and RHEV3.3 got changed from 32 to 64. And now in the latest build changed it back to 32 again... Closing as NOTABUG, as this definitely wasn't an issue in qemu-kvm after all... (didn't know about the limit)