Re: RFC: MTU for serving NFS on Infiniband

[Eric Dumazet]

Le jeudi 26 aoÃt 2010 Ã 05:40 -0600, Marc Aurele La France a Ãcrit :

> Steady now.  There's no need to YELL nor be arrogant.  You and I both know 
> there's a place for NFS over UDP.  That's not changing any time soon.  While 
> I'm aware of the issue you brought up, it is separate from the one at hand in 
> this discussion.
> 
> I do want to thank you, however, for reminding me of TCP.  It's something 
> 20/20 hindsight says I should have checked out before starting this thread. 
> Logistically, it'll be a few days before I can do so though.  If that allows 
> me to increase the MTU all the way up to 65520, then this UDP thing will 
> likely remain unresolved.
> 

Unfortunately, your infiniband device lacks NETIF_F_SG support.

MTU a bit larger than PAGE_SIZE-overhead will need high order
allocations ?



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