Hi,
Thanks for the input.
My Linux machine -kernel version is 2.6.38 and I am using KVM
Will H/w offloading feature of openvswitch works in my test environment
?
Regards
Amit Tewari
NHST
________________________________
From: Jesse Gross [mailto:[email protected]]
Sent: Wednesday, January 04, 2012 5:30 AM
To: Amit Tewari
Cc: <[email protected]>
Subject: Re: [ovs-discuss] IS H/w offload supported for KVM in
Openvswitch
On Jan 3, 2012, at 2:37 AM, "Amit Tewari" <[email protected]>
wrote:
Hi,
I wanted to know whether H/w offload feature like tx_checksum
and tcp_segmentation offload is supported for KVM in openvswitch ?
Yes, if you use the KVM virtual interfaces that support offloading and
have NICs that support it.
i saw this line of code in checksum.h
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,22) || (defined(CONFIG_XEN)
&& defined(HAVE_PROTO_DATA_VALID))
#define NEED_CSUM_NORMALIZE
#endif
My Linux machine -kernel version is 2.6.38 and I am using KVM, so I
think this flag will not be defined on my setup.
It's not necessary on that kernel.
My test -environment
Host machione -fedora 15
Guest machine - fredora 15
My Linux machine -kernel version is 2.6.38 and I am using KVM
Openvswtch bridge - br0
Tap interface for guest - vnet0
I am running a vitual machine on kvm using openvswitch 1.2.2
IF H/w offload is supported on kvm , then on which interface (i.e. br0
or vnet0 )I need to set offload parameters for my virtual machine.
The guest needs to use the right type virtual interface and have
offloading enabled. The physical NIC needs to support offloading and
have it enabled. Generally, if you use a tool like libvirt this will be
done automatically.
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