Re: [libvirt] [PATCH 3/3] kvm-all: notice KVM of vcpu's TSC rate after migration

On Wed, Sep 30, 2015 at 08:32:26AM +0800, Haozhong Zhang wrote: > > [...] > > > > Or maybe we shouldn't treat this as VM state, but as configuration, and > > > > let management configure the TSC frequency explicitly if the user really > > > > needs it to stay the same during migration. > > > > > > > > (CCing libvir-list to see if they have feedback) > > > > > > > > > > Thanks for CC. I'll consider to add a command line option to control > > > the configuration of guest TSC fequency. > > > > It already exists, -cpu has a "tsc-freq" option. > > > > What I'm considering is to add a "-keep-tsc-freq" option to control > whether the TSC frequency should be migrated if "tsc-freq" is not > presented. Compared to "tsc-freq", "-keep-tsc-freq" can free users > from figuring out the guest TSC frequency manually in the migration. If you do that, please make it a property of the CPU object, so it will can be set as a "-cpu" option.

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