netdev - Re: [PATCH 3/4] xfrm: remove policy lock when accessing policy->walk.dead

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Date:	Wed, 31 Mar 2010 18:41:44 +0200
From:	Patrick McHardy <kaber@...sh.net>
To:	Herbert Xu <herbert@...dor.apana.org.au>
CC:	jamal <hadi@...erus.ca>, Timo Teras <timo.teras@....fi>,
	netdev@...r.kernel.org, "David S. Miller" <davem@...emloft.net>
Subject: Re: [PATCH 3/4] xfrm: remove policy lock when accessing	policy->walk.dead

Herbert Xu wrote:
> On Wed, Mar 31, 2010 at 09:28:12AM -0400, jamal wrote:
>> -sudo ip route add 192.168.11.100 dev eth0 table 15
>> generates an event
>> -sudo ip route flush table 15
>> generates an event
>> -sudo ip route flush table 15
>> No event
> 
> That's completely different.  We don't have a route flush event,
> instead we're sending route delete events.  That's why when the
> table is empty you get no events.
> 
> If we had a route flush event then it would behave exactly the
> same.

I was just about to say the exact same thing when I noticed your
email. I agree with Herbert, the flush notification indicates that
the table is now empty, independant of its previous state.
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