netdev - Re: [PATCH RFC] ipv6_fib limit spinlock hold times for /proc/net/ipv6

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Date:	Sat, 26 Apr 2014 00:11:34 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	clm@...com
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH RFC] ipv6_fib limit spinlock hold times for
 /proc/net/ipv6_route

From: Chris Mason <clm@...com>
Date: Fri, 25 Apr 2014 16:27:21 -0400

> Ah ok, so the rtnl mutex can replace rcu_read_lock().  Will it end up
> blocking any traffic? (sorry, filesystem guys are a little slow)

It stops networking configuration operations.

BTW, this means that netlink based ipv6 route dumps can be
optimized similarly.  Because those code paths implicitly
hold the RTNL mutex.
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