Bug 2081241
| Summary: | VFIO_MAP_DMA failed: Cannot allocate memory -12 (VM with GPU passthrough, Q35 machine and 16 vcpus) | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Virtualization Manager | Reporter: | Chetan Nagarkar <cnagarka> |
| Component: | ovirt-engine | Assignee: | Milan Zamazal <mzamazal> |
| Status: | CLOSED ERRATA | QA Contact: | Nisim Simsolo <nsimsolo> |
| Severity: | medium | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 4.4.10 | CC: | ahadas, apinnick, bugs, cnagarka, ctomasko, mavital, michal.skrivanek, mzamazal, nsimsolo, pkubica, yanghliu |
| Target Milestone: | ovirt-4.5.1 | Keywords: | ZStream |
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | ovirt-engine-4.5.1 | Doc Type: | Bug Fix |
| Doc Text: |
Previously, VMs with one or more VFIO devices, Q35 chipset, and maximum number of vCPUs >= 256 might fail to start because of a memory allocation error reported by the QEMU guest agent. This error is fixed.
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Story Points: | --- |
| Clone Of: | 2048429 | Environment: | |
| Last Closed: | 2022-07-14 12:54:31 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | Virt | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | 2048429, 2050175 | ||
| Bug Blocks: | |||
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Comment 3
Milan Zamazal
2022-05-18 15:14:28 UTC
Milan, please add some documentation and move to MODIFIED Verified: ovirt-engine-4.5.1.1-0.14.el8ev vdsm-4.50.1.2-1.el8ev.x86_64 qemu-kvm-6.2.0-11.module+el8.6.0+15489+bc23efef.1.x86_64 libvirt-daemon-8.0.0-5.2.module+el8.6.0+15256+3a0914fe.x86_64 Verification scenario: 1. Create VM with: Q35 UEFI, 16GB memory size and 16 CPUs (s:c:th = 1:8:2) (if required, use hook from bug attachments) 2. add VFIO and passthrough NICs to VM host devices. 3. Run VM. Verify VM is running with host devices, for example: 09:00.0 VGA compatible controller: NVIDIA Corporation GK104GL [Quadro K4200] (rev a1) 06:00.0 Audio device: NVIDIA Corporation GK104 HDMI Audio Controller (rev a1) 07:00.0 Ethernet controller: Intel Corporation 82576 Gigabit Network Connection (rev 01) 08:00.0 Ethernet controller: Intel Corporation 82576 Gigabit Network Connection (rev 01) Observe vdsm.log, libvirt.log, enging.log and verify there are no errors. Observe dmesg and verify there's no message like vfio_pin_pages_remote: RLIMIT_MEMLOCK (398274330624) exceeded (see https://bugzilla.redhat.com/show_bug.cgi?id=2048429#c13). 4.Repeat step 3, this time change CPUs to 32 (1:16:2) and run VM. 5.Repeat step 3, this time change CPUs to 64 (1:32:2) and run VM. 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 (Moderate: RHV Manager (ovirt-engine) [ovirt-4.5.1] security, bug fix and update), 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://access.redhat.com/errata/RHSA-2022:5555 Due to QE capacity, we are not going to cover this issue in our automation |