Re: Fw: PROBLEM: Memory leak in -test9?

[Andrew Morton <akpm@osdl.org>]

Andrew Morton <akpm@osdl.org> wrote:
>
> 
> A memory leak in the tcp6_sock slab.
> 



Begin forwarded message:

Date: Tue, 11 Nov 2003 18:27:12 +0100
From: Thomas Habets <thomas@habets.pp.se>
To: Jörn Engel <joern@wohnheim.fh-wedel.de>
Cc: Henrik Storner <henrik@hswn.dk>, linux-kernel@vger.kernel.org
Subject: Re: PROBLEM: Memory leak in -test9?


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On Tuesday 11 November 2003 17:27, Jörn Engel wrote:
> Looks familiar.  Can you recreate and send the output from
> /proc/slabinfo?

Oh, I didn't notice that file. :-)
Recreating is just booting and waiting for a week, but the box is still up.

This is the line that stands out (complete file attached, 137 lines).

tcp6_sock         111663 111664    960    4    1 : tunables   54   27    0 : 
slabdata  27916  27916      0

I seem to remember a changelog mentioning a leak being fixed in ipv6 code, 
but it looks like there may be another one? The only ipv6 service running is 
sshd, and the mrtg-sshs that go off every 5 minutes are NOT over ipv6. 
netstat -na shows nothing interesting. Only the ssh I connect with uses a bit 
of ipv6 (ffff:1.2.3.4). So, one listening socket, and one established.

$ cat /proc/net/sockstat6
TCP6: inuse 2
UDP6: inuse 0
RAW6: inuse 0
FRAG6: inuse 0 memory 0

$ cat /proc/net/rt6_stats 
0000 0006 0000 0008 0000 0008 0003

nothing over 6 in /proc/net/dev_snmp6/*

$ cat /proc/net/snmp6
Ip6InReceives                           223315
... just 0 ...
Ip6InDelivers                           223312
... just 0 ...
Ip6OutRequests                          223312
.. nothing that looks interesting ...


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