running my qemu images with kvm

running my qemu images with kvm

[Robert P. J. Day]

  embarrassingly, i only just noticed that if i want my
yocto-generated qemu images to take advantage of kvm, i should add the
arg "kvm" to my "runqemu" invocation, is that correct?

  if that's the case, might it be worth adding that note to the
standard oe-init-build-env output at the bottom?  or perhaps referring
the user to the output of "runqemu -h" for available run-time options?

  at the moment, it seems awfully easy to run your qemu image without
realizing you're not taking advantage of kvm.  or am i misreading
something?

rday

-- 

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Robert P. J. Day                                 Ottawa, Ontario, CANADA
                        http://crashcourse.ca

Twitter:                                       http://twitter.com/rpjday
LinkedIn:                               http://ca.linkedin.com/in/rpjday
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Re: running my qemu images with kvm

[Scott Garman]

On 06/14/2012 11:05 AM, Robert P. J. Day wrote:
>
>    embarrassingly, i only just noticed that if i want my
> yocto-generated qemu images to take advantage of kvm, i should add the
> arg "kvm" to my "runqemu" invocation, is that correct?

Correct.

>    if that's the case, might it be worth adding that note to the
> standard oe-init-build-env output at the bottom?  or perhaps referring
> the user to the output of "runqemu -h" for available run-time options?

Since the oe-init-build-env script gets invoked for many scenarios that 
don't involve running runqemu, I'm not convinced that the info is needed 
- it might be nice to have, but we don't want to clutter the output with 
too much info.

>    at the moment, it seems awfully easy to run your qemu image without
> realizing you're not taking advantage of kvm.  or am i misreading
> something?

I've been running my QEMU sessions without kvm and it hasn't been a big 
deal. Since we do mention its use in the runqemu usage help, IMHO it's 
appropriately documented.

I'm not sure what the status is of kvm support in the various 
environments that Yocto is run in, so enabling kvm by default may not be 
safe. Please correct me if I'm wrong.

Thanks for the feedback,

Scott

-- 
Scott Garman
Embedded Linux Engineer - Yocto Project
Intel Open Source Technology Center