On 23/09/13 21:13, Johnny Hughes wrote:

Do we want to move the Xen4CentOS kernel to new LTS 3.10.x from the current 3.4.x Kernel?

Eventually but I don't see particular need to do this soon.

If so, can we start testing the that kernel build?

Is someone from Xen.org working on porting the xen specific patches that are required in the 3.10.x kernel from the ones we have in the 3.4.x tree in Xen4CentOS?

The only one I know we need is the blktap module.

I have created a new spec that builds a kernel with all the Xen configuration settings (except CONFIG_XEN_BLKDEV_TAP=m)

Having I think the blktap patch should just apply with some minor tweaks.

We will want to take a hack limiting the maximum order for compound page allocated to 0 to avoid large multi-page skb allocations consuming too much swiotlb resource (and making performance worse).

We have just switched XenServer to 3.10 and we are seeing odd user space crashes in a CentOS 6.4 constructed initrd so I would recommend not switching to 3.10 until we understand what is going on here.

David