* [Bug 1851664] Re: qemu-system-x86_64: "VFIO_MAP_DMA : -28" error when we attache 6 VF's to guest machine
[not found] <157313838504.19702.7205622932379991141.malonedeb@wampee.canonical.com>
@ 2019-11-07 16:37 ` Thomas Huth
2019-11-07 17:45 ` IndrasenaReddy Gali
` (4 subsequent siblings)
5 siblings, 0 replies; 6+ messages in thread
From: Thomas Huth @ 2019-11-07 16:37 UTC (permalink / raw)
To: qemu-devel
Please provide information how you started QEMU, and some information
about your PCI device (e.g. the output of lspci).
** Information type changed from Private Security to Public
** Changed in: qemu
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1851664
Title:
qemu-system-x86_64: "VFIO_MAP_DMA : -28" error when we attache 6 VF's
to guest machine
Status in QEMU:
Incomplete
Bug description:
We are trying to attach 6 VF's to the guest machine on 4.1.1 qemu emulator.
We are observing "VFIO_MAP_DMA : -28" error.
We are using w-bits=48 bits while lunching VM.
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1851664/+subscriptions
^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug 1851664] Re: qemu-system-x86_64: "VFIO_MAP_DMA : -28" error when we attache 6 VF's to guest machine
[not found] <157313838504.19702.7205622932379991141.malonedeb@wampee.canonical.com>
2019-11-07 16:37 ` [Bug 1851664] Re: qemu-system-x86_64: "VFIO_MAP_DMA : -28" error when we attache 6 VF's to guest machine Thomas Huth
@ 2019-11-07 17:45 ` IndrasenaReddy Gali
2019-11-07 17:46 ` IndrasenaReddy Gali
` (3 subsequent siblings)
5 siblings, 0 replies; 6+ messages in thread
From: IndrasenaReddy Gali @ 2019-11-07 17:45 UTC (permalink / raw)
To: qemu-devel
qemu-system-x86_64 -name guest=fedora24 -machine q35,accel=kvm,kernel-irqchip=split \
-enable-kvm \
-m 4G \
-smp 8,sockets=1,cores=8,threads=1 \
-device intel-iommu,intremap=on,caching-mode=on,aw-bits=48 \
-drive file=<OS_IMAGE_FILE>,format=raw \
-device ioh3420,id=pcie.1,chassis=1 \
-device virtio-net-pci,bus=pcie.1,disable-legacy=on,disable-modern=off,iommu_platform=on,ats=on,netdev=net0 \
-netdev user,id=net0,hostfwd=tcp::1111-:22\
-device vfio-pci,host=3f:02.1 \
-device vfio-pci,host=3f:02.2 \
-device vfio-pci,host=3f:02.3 \
-device vfio-pci,host=3f:02.4 \
-device vfio-pci,host=3d:02.4 \
-device vfio-pci,host=3d:02.5 \
-device vfio-pci,host=3d:02.6 \
-nographic
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https://bugs.launchpad.net/bugs/1851664
Title:
qemu-system-x86_64: "VFIO_MAP_DMA : -28" error when we attache 6 VF's
to guest machine
Status in QEMU:
Incomplete
Bug description:
We are trying to attach 6 VF's to the guest machine on 4.1.1 qemu emulator.
We are observing "VFIO_MAP_DMA : -28" error.
We are using w-bits=48 bits while lunching VM.
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1851664/+subscriptions
^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug 1851664] Re: qemu-system-x86_64: "VFIO_MAP_DMA : -28" error when we attache 6 VF's to guest machine
[not found] <157313838504.19702.7205622932379991141.malonedeb@wampee.canonical.com>
2019-11-07 16:37 ` [Bug 1851664] Re: qemu-system-x86_64: "VFIO_MAP_DMA : -28" error when we attache 6 VF's to guest machine Thomas Huth
2019-11-07 17:45 ` IndrasenaReddy Gali
@ 2019-11-07 17:46 ` IndrasenaReddy Gali
2019-11-07 17:46 ` Alex Williamson
` (2 subsequent siblings)
5 siblings, 0 replies; 6+ messages in thread
From: IndrasenaReddy Gali @ 2019-11-07 17:46 UTC (permalink / raw)
To: qemu-devel
Please find the above qemu command to lunch guest machine
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1851664
Title:
qemu-system-x86_64: "VFIO_MAP_DMA : -28" error when we attache 6 VF's
to guest machine
Status in QEMU:
Incomplete
Bug description:
We are trying to attach 6 VF's to the guest machine on 4.1.1 qemu emulator.
We are observing "VFIO_MAP_DMA : -28" error.
We are using w-bits=48 bits while lunching VM.
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1851664/+subscriptions
^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug 1851664] Re: qemu-system-x86_64: "VFIO_MAP_DMA : -28" error when we attache 6 VF's to guest machine
[not found] <157313838504.19702.7205622932379991141.malonedeb@wampee.canonical.com>
` (2 preceding siblings ...)
2019-11-07 17:46 ` IndrasenaReddy Gali
@ 2019-11-07 17:46 ` Alex Williamson
2019-11-08 15:48 ` IndrasenaReddy Gali
2020-01-08 4:17 ` Launchpad Bug Tracker
5 siblings, 0 replies; 6+ messages in thread
From: Alex Williamson @ 2019-11-07 17:46 UTC (permalink / raw)
To: qemu-devel
Presumably w-bits (aw-bits?) implies using intel-iommu, there's a
opportunity for the vfio iommu backend to return -ENOSPC (-28) if we
exceed the default number of in-flight DMA mappings per container. The
default limit is 65535. You can try increasing this by changing the
dma_entry_limit module option on the vfio_iommu_type1 module. Note that
in a typical vIOMMU config there's a container per device, so the number
of VFs attached is possibly not a factor. It is however a lot of DMA
mappings for a single device if this is the issue and you'd generally
want to boot the guest with iommu=pt in order to have reasonable
assigned device performance with a vIOMMU, which would also greatly
reduce the number of mappings.
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1851664
Title:
qemu-system-x86_64: "VFIO_MAP_DMA : -28" error when we attache 6 VF's
to guest machine
Status in QEMU:
Incomplete
Bug description:
We are trying to attach 6 VF's to the guest machine on 4.1.1 qemu emulator.
We are observing "VFIO_MAP_DMA : -28" error.
We are using w-bits=48 bits while lunching VM.
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1851664/+subscriptions
^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug 1851664] Re: qemu-system-x86_64: "VFIO_MAP_DMA : -28" error when we attache 6 VF's to guest machine
[not found] <157313838504.19702.7205622932379991141.malonedeb@wampee.canonical.com>
` (3 preceding siblings ...)
2019-11-07 17:46 ` Alex Williamson
@ 2019-11-08 15:48 ` IndrasenaReddy Gali
2020-01-08 4:17 ` Launchpad Bug Tracker
5 siblings, 0 replies; 6+ messages in thread
From: IndrasenaReddy Gali @ 2019-11-08 15:48 UTC (permalink / raw)
To: qemu-devel
After increasing dma_entry_limit limit no issue observed.
But ideal senario device is getting hung and recovery happening only
with host hard rebooting.
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https://bugs.launchpad.net/bugs/1851664
Title:
qemu-system-x86_64: "VFIO_MAP_DMA : -28" error when we attache 6 VF's
to guest machine
Status in QEMU:
Incomplete
Bug description:
We are trying to attach 6 VF's to the guest machine on 4.1.1 qemu emulator.
We are observing "VFIO_MAP_DMA : -28" error.
We are using w-bits=48 bits while lunching VM.
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1851664/+subscriptions
^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug 1851664] Re: qemu-system-x86_64: "VFIO_MAP_DMA : -28" error when we attache 6 VF's to guest machine
[not found] <157313838504.19702.7205622932379991141.malonedeb@wampee.canonical.com>
` (4 preceding siblings ...)
2019-11-08 15:48 ` IndrasenaReddy Gali
@ 2020-01-08 4:17 ` Launchpad Bug Tracker
5 siblings, 0 replies; 6+ messages in thread
From: Launchpad Bug Tracker @ 2020-01-08 4:17 UTC (permalink / raw)
To: qemu-devel
[Expired for QEMU because there has been no activity for 60 days.]
** Changed in: qemu
Status: Incomplete => Expired
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1851664
Title:
qemu-system-x86_64: "VFIO_MAP_DMA : -28" error when we attache 6 VF's
to guest machine
Status in QEMU:
Expired
Bug description:
We are trying to attach 6 VF's to the guest machine on 4.1.1 qemu emulator.
We are observing "VFIO_MAP_DMA : -28" error.
We are using w-bits=48 bits while lunching VM.
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1851664/+subscriptions
^ permalink raw reply [flat|nested] 6+ messages in thread