Messages in this thread | | | Date | Tue, 16 Mar 2010 12:08:22 -0400 | From | "Frank Ch. Eigler" <> | Subject | Re: [PATCH] Enhance perf to collect KVM guest os statistics from host side |
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Hi -
On Tue, Mar 16, 2010 at 04:52:21PM +0100, Ingo Molnar wrote: > [...] > > Perhaps the fact that kvm happens to deal with an interesting application > > area (virtualization) is misleading here. As far as the host kernel or > > other host userspace is concerned, qemu is just some random unprivileged > > userspace program [...]
> You are quite mistaken: KVM isnt really a 'random unprivileged > application' in this context, it is clearly an extension of > system/kernel services.
I don't know what "extension of system/kernel services" means in this context, beyond something running on the system/kernel, like every other process. To clarify, to what extent do you consider your classification similarly clear for a host is running
* multiple kvm instances run as unprivileged users * non-kvm OS simulators such as vmware or xen or gdb * kvm instances running something other than linux
> ( Which can be seen from the simple fact that what started the > discussion was 'how do we get /proc/kallsyms from the > guest'. I.e. an extension of the existing host-space /proc/kallsyms > was desired. )
(Sorry, that smacks of circular reasoning.)
It may be a charming convenience function for perf users to give them shortcuts for certain favoured configurations (kvm running freshest linux), but that says more about perf than kvm.
- FChE
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