netdev - Re: [PATCH net-next 0/2] sunvnet: Packet processing in non-interrupt context.

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Message-Id: <20141010.003628.646817757614430018.davem@davemloft.net>
Date:	Fri, 10 Oct 2014 00:36:28 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	Raghuram.Kothakota@...cle.com
Cc:	sowmini.varadhan@...cle.com, netdev@...r.kernel.org
Subject: Re: [PATCH net-next 0/2] sunvnet: Packet processing in
 non-interrupt context.

From: Raghuram Kothakota <Raghuram.Kothakota@...cle.com>
Date: Thu, 9 Oct 2014 18:10:24 -0700

> Lock less Tx and Rx implementation is very nice, but requires to the
> code path to single threaded to achieve it.

I would like to know how you believe the Linux LLTX "lockless TX"
facility works.

It's not truly lockless, it just turns off the generic networking TX
path per-queue spinlock and puts the full burdon on the driver.  It's
just moving the locking from one place to another, not eliminating it.
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