netdev - Any good documentation on RTNL

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Date:	Wed, 12 Dec 2012 15:15:38 -0800
From:	Ben Greear <greearb@...delatech.com>
To:	netdev <netdev@...r.kernel.org>
Subject: Any good documentation on RTNL

I'm wondering if anyone could point me to some documentation on
the finer points of what the rtnl_lock() does?  I can't find anything
overly useful in google or the kernel docs.

For instance, can the packet rx-logic run (on other threads?) while rtnl is held?

How about tx-logic?

In particular, I'm interested to know if it is valid to have
this state:

thread 1 holds RTNL, and blocks on thread 2 due to trying to flush a work-queue.

thread 2 is processing an item on that work-queue, and the work item is sending packets
   (and blocking for up to 200ms timeout trying to flush a wifi driver's queues).

Thanks,
Ben

-- 
Ben Greear <greearb@...delatech.com>
Candela Technologies Inc  http://www.candelatech.com

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