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Re: [Qemu-devel] Problems with VM after kernel commit b18d5431acc7a2fd22
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From: |
Paolo Bonzini |
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Subject: |
Re: [Qemu-devel] Problems with VM after kernel commit b18d5431acc7a2fd22767925f3a6f597aa4bd29e |
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Date: |
Fri, 13 Nov 2015 16:01:06 +0100 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 |
On 13/11/2015 15:55, Wolfgang Link wrote:
> Hi,
>
> We have problems with a HP ProLiant DL380 Gen9 and Vm's with large
> amount of memory, grater then 30GB.
>
> The problem is that the vm need about 10 sec to start to boot.
> and when it comes to syncing the cpu clock, it takes a long time to
> finish this task.
> What also occurs is the vcpus need at startup 100% cpu usage and take
> over 1 min.
This has been fixed already, and the fix is slowly propagating to the
stable kernels.
The fixes are:
- KVM: vmx: obey KVM_QUIRK_CD_NW_CLEARED (fixed already in 4.2)
- KVM: x86: obey KVM_X86_QUIRK_CD_NW_CLEARED in kvm_set_cr0() (in 4.4,
will be backported)
Paolo