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Message-ID: <1340990157.21162.5.camel@edumazet-glaptop> Date: Fri, 29 Jun 2012 19:15:57 +0200 From: Eric Dumazet <eric.dumazet@...il.com> To: Andreas Gruenbacher <agruen@...bit.com> Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org, Herbert Xu <herbert@...dor.apana.org.au>, "David S. Miller" <davem@...emloft.net> Subject: Re: [RFC] [TCP 1/3] tcp: Add MSG_NEW_PACKET flag to indicate preferable packet boundaries On Fri, 2012-06-29 at 17:38 +0200, Andreas Gruenbacher wrote: > The primary use case is fast Gigabit (10 or more) Ethernet connections > with jumbo frames and switches that support them. There, frames will go > through unchanged and you can zero-copy receive all the time. > > Not sure how well the approach scales to other kinds of connections; it > may work often enough to be worth it. When things get distorted between > the sender and the receiver and tcp_recvbio() fails, the data can still > be copied out of the socket as before. If you have a packet loss, receiver can and will coalesce frames. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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