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Date:	Sat, 14 Apr 2012 15:47:24 -0400 (EDT)
From:	David Miller <>
Subject: Re: [PATCH net-next] tcp: RFC6298 supersedes RFC2988bis

From: Eric Dumazet <>
Date: Fri, 13 Apr 2012 07:48:40 +0200

> Updates some comments to track RFC6298
> Signed-off-by: Eric Dumazet <>
> Cc: H.K. Jerry Chu <>
> Cc: Tom Herbert <>


> BTW, one side effect of the TCP_TIMEOUT_INIT change (3 -> 1) is
> inet_csk_reqsk_queue_prune() latency is 200% worse:
> It fires every 200ms and scans 40% of hash table each time, listener
> socket held.

That's rather unfortunate, but I can't see an easy way around it.  We
have to process the whole table within the timeout quantum.
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