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| From: | Paolo Bonzini |
| Subject: | Re: [Qemu-devel] [PATCH v3 1/2] kvm: support -dedicated cpu-pm=on|off |
| Date: | Wed, 20 Jun 2018 16:20:40 +0200 |
| User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.7.0 |
On 19/06/2018 22:43, Michael S. Tsirkin wrote: > >> 2) Maybe -hostresource? > > Is ability to cause high latency for other threads really a resource? The "resource" here is host CPU time. In general, a vCPU with KVM_CPU_X86_DISABLE_EXITS will use more host CPU time and block overcommitting, just like mlock does for memory. Paolo > The issues in question: > 1. a malicious guest can cause high latency for others sharing the host cpu. > 2. to host scheduler cpu looks busier than it really is.
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