netdev - RE: [PATCH RFC] ipv6: use stronger hash for reassembly queue hash table

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Message-ID: <1363257272.29475.6.camel@edumazet-glaptop>
Date:	Thu, 14 Mar 2013 11:34:32 +0100
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	David Laight <David.Laight@...LAB.COM>
Cc:	Hannes Frederic Sowa <hannes@...essinduktion.org>,
	Stephen Hemminger <stephen@...workplumber.org>,
	netdev@...r.kernel.org, yoshfuji@...ux-ipv6.org, brouer@...hat.com
Subject: RE: [PATCH RFC] ipv6: use stronger hash for reassembly queue hash
 table

On Thu, 2013-03-14 at 09:47 +0000, David Laight wrote:

> I'd also have thought that INETFRAGS_MAXDEPTH should be run-time tunable.

The useful thing would be to be able to resize the hash table, for some
heavy user cases.

Check net/ipv4/tcp_metrics.c : Not only we use a small depth, but is not
tunable.

#define TCP_METRICS_RECLAIM_DEPTH   5


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