qemu 2.4 feature
changelog: rebase on last git
Note that currently linux guest don't support unplug of dimm when it'sused by kernel memory.
They are some tunning to do with memory zone movable.
http://events.linuxfoundation.org/sites/events/files/lcjp13_chen.pdf
Signed-off-by: Alexandre Derumier <aderumier@odiso.com>
Changed from old, now missing, subroutine parse_startup() to new
pve_parse_startup_order() in qemu-server and pve-manager
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
Currently enforce with cpumodel=host on amd cpus don't work,
because amd cpus have unsupported flags in qemu.
This is a protection, and this is good.
but cpumodel host should be never use by users for production (only for testing).
For production and stability, users need to choose a true cpu model which filter
the supported cpuflags by qemu.
So I think we can remove the enforce for host model as for testing it's ok.
warning: host doesn't support requested feature: CPUID.80000001H:EDX [bit 0]
warning: host doesn't support requested feature: CPUID.80000001H:EDX [bit 1]
warning: host doesn't support requested feature: CPUID.80000001H:EDX [bit 2]
warning: host doesn't support requested feature: CPUID.80000001H:EDX [bit 3]
warning: host doesn't support requested feature: CPUID.80000001H:EDX [bit 4]
warning: host doesn't support requested feature: CPUID.80000001H:EDX [bit 5]
warning: host doesn't support requested feature: CPUID.80000001H:EDX [bit 6]
warning: host doesn't support requested feature: CPUID.80000001H:EDX [bit 7]
warning: host doesn't support requested feature: CPUID.80000001H:EDX [bit 8]
warning: host doesn't support requested feature: CPUID.80000001H:EDX [bit 9]
warning: host doesn't support requested feature: CPUID.80000001H:EDX [bit 12]
warning: host doesn't support requested feature: CPUID.80000001H:EDX [bit 13]
warning: host doesn't support requested feature: CPUID.80000001H:EDX [bit 14]
warning: host doesn't support requested feature: CPUID.80000001H:EDX [bit 15]
warning: host doesn't support requested feature: CPUID.80000001H:EDX [bit 16]
warning: host doesn't support requested feature: CPUID.80000001H:EDX [bit 17]
warning: host doesn't support requested feature: CPUID.80000001H:EDX [bit 23]
warning: host doesn't support requested feature: CPUID.80000001H:EDX [bit 24]
Signed-off-by: Alexandre Derumier <aderumier@odiso.com>
rdtscp is not supported by qemu and with enforce it's not starting
warning: host doesn't support requested feature: CPUID.80000001H:EDX.rdtscp [bit 27]
from to qemu wiki
http://wiki.qemu.org/Features/CPUModels#Disabling_features_that_were_always_disabled_on_KVM
"Fact: currently libvirt runs CPU models having rdtscp without the "enforce" flag, and rdtscp is silently disabled
Consequence: libvirt SHOULD use something like "-cpu Opteron_G5,-rdtscp",
especially when it starts using (or emulating) enforce mode
This will require a solution on libvirt side. QEMU will just provide the mechanisms to report CPU model information
and check what the host and QEMU supports, but the decision to disable rdtscp to be able
to run Opteron_G[2345] needs to be taken by libvirt."
Signed-off-by: Alexandre Derumier <aderumier@odiso.com>
Only non-cdrom drives default to cache=none, so the check
for whether to default to aio=native needs to take the same
condition into account.
I combined them close together to make their relation more
visible.
drive-mirror is doing lseek on source image before starting, and this can take a lot of time for big nfs volume
during this time, qmp socket is hanging
http://lists.nongnu.org/archive/html/qemu-devel/2015-05/msg01838.html
so we need to setup a big timeout
qemu devs are currently working to fix this
Signed-off-by: Alexandre Derumier <aderumier@odiso.com>
Since qemu 2.2, a new "ready" flag has been added to blockjob
http://git.qemu.org/?p=qemu.git;a=commit;h=ef6dbf1e46ebd1d41ab669df5bba0bbdec6bd374
to known if we can complete it.
we can't use len==offset to known if all block are mirrored, because behaviour will change soon in qemu 2.3
http://git.qemu.org/?p=qemu.git;a=commit;h=b21c76529d55bf7bb02ac736b312f5f8bf033ea2
"block/mirror: Improve progress report
Instead of taking the total length of the block device as the block
job's length, use the number of dirty sectors. The progress is now the
number of sectors mirrored to the target block device. Note that this
may result in the job's length increasing during operation, which is
however in fact desirable.
"
Signed-off-by: Alexandre Derumier <aderumier@odiso.com>
It is better to check if a VM is running in QemuServer then in Storage.
for the Storage there is no difference if it is running or not.
Signed-off-by: Wolfgang Link <w.link@proxmox.com>
Currently qemu auto fallback to aio=threads if cache=none|directsync
It's better to handle that correctly
see:
https://bugzilla.redhat.com/show_bug.cgi?id=1086704http://wiki.qemu.org/ChangeLog/2.3
Future incompatible changes:
Block device parameter aio=native has no effect without cache.direct=on. It will be made an error.
Signed-off-by: Alexandre Derumier <aderumier@odiso.com>
we need to remove scsi controller, because live migration will crash,
as on migration target node, we'll start the vm without controller if no disk exist
Signed-off-by: Alexandre Derumier <aderumier@odiso.com>
pci bridge are not hot-unplugglable,
which can give us live migration problem,
if we hot-unplug a device on pcibridge 1 or 2, we don't create the pci bridge on target guest
and pci bridge hotplug is not working on all os (windows for example).
So it's better to always add them at startup.
Signed-off-by: Alexandre Derumier <aderumier@odiso.com>
It wasn't working with 2.6.32,
now that 3.10 kernel is the default, we can enable it.
It's help to be sure that all cpu flags are supported by host && qemu,
to be sure that nothing break
Signed-off-by: Alexandre Derumier <aderumier@odiso.com>
Paravirtualized End-of-Interrupt Indication (PV-EOI)
Hosts and guests require two VM exits (context switches from a VM to a Hypervisor) for each interrupt:
one to inject the interrupt, and another to signal the end of the interrupt.
With pv_eoi , they can negotiate a paravirtualized end-of-interrupt feature and only require one switch per interrupt.
Number of exits is reduced by half for interrupt-intensive workloads,
such as incoming network traffic with a virtio network device.
This leads to significant reduction in host CPU utilization for such workloads.
Signed-off-by: Alexandre Derumier <aderumier@odiso.com>
This sub compare current machine type to a specific version,
and return 1 if machinetype is bigger or equal to version
Signed-off-by: Alexandre Derumier <aderumier@odiso.com>
we always need to enable pooling interval, because it doesn't seem to be setup with -machine option
Signed-off-by: Alexandre Derumier <aderumier@odiso.com>
