From: Tom Herbert <therbert@google.com>
To: David Miller <davem@davemloft.net>
Cc: rick.jones2@hp.com, netdev@vger.kernel.org
Subject: Re: Generalizing mmap'ed sockets
Date: Fri, 19 Nov 2010 13:55:15 -0800 [thread overview]
Message-ID: <AANLkTinCS2LuNv3opCvTcTrxbm5HzFy7JESdu_CzyrFB@mail.gmail.com> (raw)
In-Reply-To: <20101119.135213.15239226.davem@davemloft.net>
On Fri, Nov 19, 2010 at 1:52 PM, David Miller <davem@davemloft.net> wrote:
> From: Rick Jones <rick.jones2@hp.com>
> Date: Fri, 19 Nov 2010 13:32:57 -0800
>
>> I suppose then one would be able to track the consumer pointer (on tx)
>> to "know" that certain data had been ACKed by the remote? For TCP
>> anyway - and assuming there wouldn't be a case where TCP might copy
>> the data out of the ring and assert "completion."
>
> Yes, that's implicit in his design, the kernel manages the consumer
> pointer in the ring and this is how userspace can see when ring entries
> are reusable.
>
And, for stream sockets the ring would be one big contiguous buffer,
for datagram would be packetized buffer like with packet interface.
next prev parent reply other threads:[~2010-11-19 21:55 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-19 20:04 Generalizing mmap'ed sockets Tom Herbert
2010-11-19 21:32 ` Rick Jones
2010-11-19 21:52 ` David Miller
2010-11-19 21:55 ` Tom Herbert [this message]
2010-11-19 21:58 ` Rick Jones
2010-11-19 22:08 ` David Miller
2010-11-19 22:47 ` Rick Jones
2010-11-19 22:49 ` Tom Herbert
2010-11-24 19:57 ` Michael S. Tsirkin
2010-11-19 22:10 ` Andrew Grover
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