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From: David Miller <davem@davemloft.net>
Subject: Re: [RFC V2 PATCH] rtnetlink: Add method to calculate dump info
 data size
Date: Mon, 09 May 2011 20:49:59 -0700 (PDT)
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From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Tue, 10 May 2011 05:45:27 +0200

> We only need to maintain a global variable to hold min_dump_alloc
> 
> [ and only increase this variable when necessary, not bother to decrease
> it when removing a driver ]

Agreed, this is probably the best approach.