On Fri, 2011-07-01 at 11:57 +0200, Gianluca Cecchi wrote: > Hello, > I'm going to open an official information ticket with RH, but > eventually I can get information here too, at least for common usage. > I have rh el 6.1 hypervisor. > > In "KVM Guest VM compatibility" section, the > Red_Hat_Enterprise_Linux-6-Virtualization-en-US guide contains: > > The following URL is a complete chart showing supported operating > systems and host and guest > combinations: > http://www.redhat.com/rhel/server/virtualization_support.html#virt_matrix > > At the link I can see for the RHEL 6 64-bit x86_64 (KVM) hypervisor: > Windows 7 32-Bit x86 Optimized (5) > and (5) contains: > For best performance, the para-virtualized I/O drivers (virtio-win) > are required to be installed in the Windows(tm) guests. The drivers > are made available as images in the Supplementary channel of the RHEL > 5 host OS, please refer to http://kbase.redhat.com/faq/docs/DOC-24866 > for details. Please see the Microsoft SVVP site for certification > details > > unfortunately the doc seems to apply to RHEV only (that at this moment > doesn't support RH EL 6 hypervisors, btw...) > On my hypervisor I have virtio-win-1.2.0-1.el6.noarch and it seems the > latest available. > Under /usr/share/virtio-win/drivers/i386/Win7 > # ll > total 32 > -rwxr-xr-x 1 root root 7750 Apr 26 20:39 viostor.cat > -rwxr-xr-x 1 root root 2554 Apr 26 20:39 viostor.inf > -rwxr-xr-x 1 root root 19016 Apr 26 20:39 viostor.sys > > Does this mean that using virtio for network card is not supported in > rhel 6? And that I had better not to use win2008 drivers? > So in thiscase what would be the better between the available ones: > e1000, rtl8139, ne2k_pci, pcnet? > > Instead in Win2008 folders (both i386 and amd64) I see I have: > -rwxr-xr-x 1 root root 7480 Apr 26 20:39 netkvm.cat > -rwxr-xr-x 1 root root 12691 Apr 26 20:39 netkvm.inf > -rwxr-xr-x 1 root root 71752 Apr 26 20:39 netkvm.sys > -rwxr-xr-x 1 root root 7766 Apr 26 20:39 viostor.cat > -rwxr-xr-x 1 root root 2554 Apr 26 20:39 viostor.inf > -rwxr-xr-x 1 root root 19016 Apr 26 20:39 viostor.sys > > Thanks, > Gianluca <snip> It has been well over a year since we tested them side by side but, when we did, the e1000 driver outperformed the virtio driver to our great surprise. I do not know if that is still the case - John
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