By the way, this behavior is on 2.2 kernels, I have no CIPE units
running 2.4 and you did not mention which kernel version you are
using.
> -----Original Message-----
> From: linux-kernel-owner@vger.kernel.org
> [mailto:linux-kernel-owner@vger.kernel.org]On Behalf Of
> Deepinder Singh
> Sent: Thursday, January 31, 2002 10:33 AM
> To: linux-kernel@vger.kernel.org
> Subject: Memory leaks with GRE Tunnels
>
>
> Hi ,
>
> I have been doing some testing using GRE tunnels in Linux (
> which btw
> work great ). I found that creating and deleting a tunnel
> results in a
> memory leak.
>
> To test it out I wrote a small script that basically loops around
> creating and then deleting 8000 tunnel interfaces at a time. On the
> eighth iteration the system hangs a whole with no error
> messages. There
> was still enoungh virtual memory around even with the leaks so I
> figured something else is wrong. It turns out that the
> interface numbers
> ( as seen in ' ip link ls' ) do not seem to be reused when
> an interface
> is deleted and as such the system hangs when the number reaches 64K.
>
> I suspect the two issues are realted but am more of a cisco
> guy and know
> kernel internals. The total mem leak for the 64 K tunnels
> is about 200 megs.
>
> Please cc me if you reply to this post as I am not on the list.
>
> thanks,
> Deepinder Singh
> Sr. Network Eng.
> Soma Networks
>
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