On Mon, Sep 07, 2015 at 05:47:39PM +0200, Karel Hendrych wrote: > ... > > changing from: <driver name='file'/> to: <driver name='tap2'/> makes > the domain start without QEMU. > > However I see much better performance with QEMU (close to dom0, > tested using simple dd writes) than with tap2 driver. Is that > expected? > How did you measure it? buffered or direct io? -- Pasi > What's best practise to file based storage on latest CentOS6-xen > (Kernel 3.18.17, Xen 4.4.2-7) > > Are there any guides around running QEMU on CentOS6-xen as non-root user? > > Cheers > -- > Karel > > On 7.9.2015 17:42, Karel Hendrych wrote: > >Hi, spot on! > > > > > >On 6.9.2015 12:56, Pasi Kärkkäinen wrote: > >>On Sun, Sep 06, 2015 at 09:08:50AM +0200, Karel Hendrych wrote: > >>>Hi, after migrating to libvirt/libxl according to: > >>> > >> > >>Hi, > >> > >>>https://wiki.centos.org/HowTos/Xen/Xen4QuickStart/Xen4Libvirt > >>> > >>>I've noticed that my Xen PV domains are being launched by > >>>qemu-system-i386 running under root privileges. > >>> > >>>I am wondering why is this? Previously no qemu process was used. > >>> > >>>If qemu is needed for some reason, are there any guidelines for > >>>non-root operation? > >>> > >> > >>In general qemu is used for the following purposes: > >> > >>- for certain domU disk backend types (image files), and/or if there's > >>no blktap driver in dom0 kernel. > >>- domU graphical console (PVFB) VNC server, if it's enabled for the domU. > >> > >> > >>>-- > >>>Karel Hendrych > >> > >> > >>-- Pasi > >> > >>_______________________________________________ > >>CentOS-virt mailing list > >>CentOS-virt at centos.org > >>https://lists.centos.org/mailman/listinfo/centos-virt > >> > _______________________________________________ > CentOS-virt mailing list > CentOS-virt at centos.org > https://lists.centos.org/mailman/listinfo/centos-virt