Re: [Qemu-trivial] [Qemu-devel] [RFC PATCH 4/4] qemu-options: Do not show -enable-kvm and -enable-hax in the docs anymore

[Thomas Huth]

On 22.06.2018 20:11, Eduardo Habkost wrote:
> On Tue, Jun 19, 2018 at 06:16:33PM +0200, Paolo Bonzini wrote:
>> On 19/06/2018 17:15, Cornelia Huck wrote:
>>>> Why does a user have to know how to enable KVM?  Oh, because our default
>>>> is "run this guest much slower than necessary".  Great!
>>> Should we try again to default to a better accelerator, if possible? I
>>> don't quite recall why we didn't do so the last time that came up...
>>> was it tests?
>>
>> My plan was to create qemu-{kvm,hax,hvf,whpx} binaries that default to a
>> better accelerator, and leave qemu-system-* as defaulting to TCG.  This
>> matches what distributions already do.
> 
> Why is this better than using KVM by default if it's available?

The answer is (as almost always): Compatibility with migration. Nobody
dares to sacrifice that chicken :-(

 Thomas