Bug 1283924
Summary: | ppc64le: VFIO doesn't work for small guests (1 GiB) [7.2.z] | ||
---|---|---|---|
Product: | Red Hat Enterprise Linux 7 | Reporter: | Jan Kurik <jkurik> |
Component: | libvirt | Assignee: | Andrea Bolognani <abologna> |
Status: | CLOSED ERRATA | QA Contact: | Virtualization Bugs <virt-bugs> |
Severity: | urgent | Docs Contact: | |
Priority: | high | ||
Version: | 7.2 | CC: | abologna, dgibson, dyuan, dzheng, gklein, gsun, hannsj_uhl, jdenemar, jherrman, jsuchane, juzhang, lvivier, mavital, michen, mpoledni, mzhan, pkrempa, qzhang, rbalakri, tlavigne, virt-maint |
Target Milestone: | rc | Keywords: | ZStream |
Target Release: | --- | ||
Hardware: | ppc64le | ||
OS: | Linux | ||
Whiteboard: | |||
Fixed In Version: | libvirt-1.2.17-13.el7_2.1 | Doc Type: | Bug Fix |
Doc Text: |
Prior to this update, guest virtual machines with 1 GiB or less allocated memory in some cases failed to start on IBM Power systems. With this update, the memory lock limit is calculated using architecture-specific logic, which allows the affected guests to start as expected.
|
Story Points: | --- |
Clone Of: | 1273480 | Environment: | |
Last Closed: | 2015-12-08 10:41:39 UTC | Type: | --- |
Regression: | --- | Mount Type: | --- |
Documentation: | --- | CRM: | |
Verified Versions: | Category: | --- | |
oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
Cloudforms Team: | --- | Target Upstream Version: | |
Embargoed: | |||
Bug Depends On: | 1273480 | ||
Bug Blocks: | 1201513 |
Description
Jan Kurik
2015-11-20 10:01:50 UTC
Test with below packages: libvirt-1.2.17-13.el7_2.1.ppc64le qemu-kvm-rhev-2.3.0-31.el7_2.3.ppc64le kernel-3.10.0-327.el7.ppc64le ************************************************************* Test 1: MaxMemory + small guest memory 1G + Hostdev can start up now (failed before the fix) # virsh nodedev-dumpxml pci_0003_09_00_0 ... <iommuGroup number='1'> <address domain='0x0003' bus='0x09' slot='0x00' function='0x0'/> <address domain='0x0003' bus='0x09' slot='0x00' function='0x1'/> <address domain='0x0003' bus='0x09' slot='0x00' function='0x2'/> <address domain='0x0003' bus='0x09' slot='0x00' function='0x3'/> </iommuGroup> Guest XML: <maxMemory slots='2' unit='KiB'>10485760</maxMemory> <memory unit='KiB'>1048576</memory> <cpu mode='custom' match='exact'> <model fallback='allow'>POWER8</model> <numa> <cell id='0' cpus='0' memory='1048576' unit='KiB'/> </numa> </cpu> <devices> <hostdev mode='subsystem' type='pci' managed='yes'> <source> <address domain='0x0003' bus='0x09' slot='0x00' function='0x0'/> </source> <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/> </hostdev> <hostdev mode='subsystem' type='pci' managed='yes'> <source> <address domain='0x0003' bus='0x09' slot='0x00' function='0x1'/> </source> <address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x0'/> </hostdev> <hostdev mode='subsystem' type='pci' managed='yes'> <source> <address domain='0x0003' bus='0x09' slot='0x00' function='0x2'/> </source> <address type='pci' domain='0x0000' bus='0x00' slot='0x09' function='0x0'/> </hostdev> <hostdev mode='subsystem' type='pci' managed='yes'> <source> <address domain='0x0003' bus='0x09' slot='0x00' function='0x3'/> </source> <address type='pci' domain='0x0000' bus='0x00' slot='0x0a' function='0x0'/> </hostdev> </devices> # virsh start avocado-vt-vm1 Domain avocado-vt-vm1 started ************************************************************* Test 2: Small guest memory 1G + without hostdev can start and small guest memory 1G + hostdev can start up now (failed before the fix) Guest XML: <memory unit='KiB'>1048576</memory> <devices> ... <hostdev mode='subsystem' type='pci' managed='yes'> <source> <address domain='0x0003' bus='0x09' slot='0x00' function='0x0'/> </source> <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/> </hostdev> <hostdev mode='subsystem' type='pci' managed='yes'> <source> <address domain='0x0003' bus='0x09' slot='0x00' function='0x1'/> </source> <address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x0'/> </hostdev> <hostdev mode='subsystem' type='pci' managed='yes'> <source> <address domain='0x0003' bus='0x09' slot='0x00' function='0x2'/> </source> <address type='pci' domain='0x0000' bus='0x00' slot='0x09' function='0x0'/> </hostdev> <hostdev mode='subsystem' type='pci' managed='yes'> <source> <address domain='0x0003' bus='0x09' slot='0x00' function='0x3'/> </source> <address type='pci' domain='0x0000' bus='0x00' slot='0x0a' function='0x0'/> </hostdev> </devices> # virsh start avocado-vt-vm1 Device attached successfully Within the guest # lspci 00:07.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5719 Gigabit Ethernet PCIe (rev 01) 00:08.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5719 Gigabit Ethernet PCIe (rev 01) 00:09.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5719 Gigabit Ethernet PCIe (rev 01) 00:0a.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5719 Gigabit Ethernet PCIe (rev 01) ************************************************************* Test 3: Small guest memory 1G + hotplug PCI device can work now (failed before the fix) Guest XML: <memory unit='KiB'>1048576</memory> # virsh start avocado-vt-vm1 Device attached successfully attach.xml: <hostdev mode='subsystem' type='pci' managed='yes'> <source> <address domain='0x0003' bus='0x09' slot='0x00' function='0x0'/> </source> </hostdev> # virsh attach-device avocado-vt-vm1 attach.xml Device attached successfully within the guest: # lspci 00:07.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5719 Gigabit Ethernet PCIe (rev 01) ************************** Pass. ************************** Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://rhn.redhat.com/errata/RHBA-2015-2567.html |