Re: [PLEASE-TESTME] Zerocopy networking patch, 2.4.0-1

[Trond Myklebust <trond.myklebust@xxxxxxxxxx>]

>>>>> David S Miller <davem@xxxxxxxxxx> writes:

     >    I would have thought one of the main interests of doing
     >    something like this would be to allow us to speed up large
     >    writes to the socket for ncpfs/knfsd/nfs/smbfs/...

     > This is what TCP_CORK/MSG_MORE et al. are all for, things get
     > coalesced perfectly.  Sending in a vector of pages seems nice,
     > but none of the page cache infrastructure works like this, all
     > of the core routines work on a page at a time.  It actually
     > simplifies a lot.

     > The writepage interface optimizes large file writes to a socket
     > just fine.

OK, but can you eventually generalize it to non-stream protocols
(i.e. UDP)?
After all, it doesn't make sense to differentiate between zero-copy on
stream and non-stream sockets, and Linux NFS, at least, remains
heavily UDP-oriented...

Cheers,
  Trond