linux-kernel - Re: dst cache overflow

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Message-ID: <20080317012513.GA3139@yamamaya.is-a-geek.org>
Date:	Mon, 17 Mar 2008 02:25:13 +0100
From:	Tobias Diedrich <ranma@...edrich.de>
To:	Herbert Xu <herbert@...dor.apana.org.au>,
	linux-net@...r.kernel.org, linux-kernel@...r.kernel.org,
	dada1@...mosbay.com
Subject: Re: dst cache overflow

Hi all,

just a reminder, the server is now running 2.6.24 and the leak is
still there.  I noticed there is a slab leak debug option and turned
it on, results should be visible in a few days I guess.

Offenders: Slabs TCPv6, size_2048 and size_512 grow over time.

I also noticed that the machine stops responding to pings after some
time, which seems to coincide with a slight increase in leak speed.

Interstingly IPv4 pings give out first, IPv6 pings continue to work a bit
longer, but eventually fail too. (Because sixxs starts sending 'your
tunnel is down!' mails I actually wrote a userspace pingd as a
workaround...)

/proc/net/snmp seems to indicate the kernel thinks it is still
sending ping replies.

HTH,

-- 
Tobias						PGP: http://9ac7e0bc.uguu.de
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