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Subjectdhcp-based netboot over jumbo-frame network?

Hi all,

We have an existing system that loads a bare kernel using tftp, then
mounts a rootfs via NFS. The wrinkle is that this is on a jumbo-frame
enabled network, so somehow the MTU needs to be set before mounting the
rootfs.

In a previous version we patched ipconfig.c to support the DHCP option
to specify the MTU value, but I'm wondering about the "proper" way to do
this on current kernels.

I suppose the obvious answer would be initramfs. The downsides to that
solution are that it would increase the size of the kernel file, and we
would need to change the existing build system. In the face of a small
patch to ipconfig, it's not a very attractive solution.

Looking forward to your responses.

Chris


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