Re: [Qemu-devel] Anyone seeing huge slowdown launching qemu with Linux 2.6.35?

[Anthony Liguori]

On 08/04/2010 01:13 PM, Alexander Graf wrote:
> On 04.08.2010, at 19:46, Richard W.M. Jones wrote:
>
>    
> > On Wed, Aug 04, 2010 at 07:36:04PM +0300, Avi Kivity wrote:
> >      
> > > This is basically my suggestion to libguestfs: instead of generating
> > > an initrd, generate a bootable cdrom, and boot from that.  The
> > > result is faster and has a smaller memory footprint.  Everyone wins.
> > >        
> > We had some discussion of this upstream&  decided to do this.  It
> > should save the time it takes for the guest kernel to unpack the
> > initrd, so maybe another second off boot time, which could bring us
> > ever closer to the "golden" 5 second boot target.
> >
> > It's not trivial mind you, and won't happen straightaway.  Part of it
> > is that it requires reworking the appliance builder (a matter of just
> > coding really).  The less trivial part is that we have to 'hide' the
> > CD device throughout the publically available interfaces.  Then of
> > course, a lot of testing.
> >      
> Why not go with 9p? That would save off even more time, as you don't have to 
> generate an iso. You could just copy all the relevant executables into tmpfs 
> and boot from there using your kernel and a very small (pre-built) initrd.
>    

You can't boot from 9p.

Regards,

Anthony Liguori

> Alex
>
>