Re: [Qemu-discuss] what is the defferences between /usr/libexec/qemu-kvm and /usr/bin/qemu-system-x86_64?

[Mike Lovell]

On 10/14/2012 04:02 AM, yue-kvm wrote:
>   what is the defferences between /usr/libexec/qemu-kvm and 
> /usr/bin/qemu-system-x86_64?
> > my OS is centos6.2,   qemu-kvm is from a rpm package, while  
> qemu-system-x86_64 is builded  manually from  source code.
> > 1.
> > if i can recognize they are the same thing?
> > 2. for centos distro, how to build a qemu rpm from source code? it seems 
> there is no  qemu.spec file

qemu-system-x64_64 is a binary that is built by the qemu source code. 
qemu-kvm is a binary from the qemu-kvm branch of qemu. the qemu-kvm 
branch was where the original work for kvm was done. almost all of the 
work that was done in the qemu-kvm branch has been merged back into the 
main qemu source tree and i think the developers want to complete 
merging everything in the next release or two. the only thing i can 
think of from qemu-kvm that hasn't made it upstream is a handful of 
command line switches for enabling or disabling certain features though 
i think the features they change are already upstream. they are very 
similar in recent versions.

as for building an rpm, i would guess that the spec file from the source 
rpm for qemu-kvm would work with qemu. i just looked in the qemu-kvm 
source code and didn't see a spec file there. it is probably something 
that the distribution maintains and, since the source trees are similar, 
it might just work between the two.

hope that helps.

mike