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From: Sven Eckelmann <sven@narfation.org>
Date: Tue, 26 Dec 2017 15:19:41 +0100
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Subject: Re: [B.A.T.M.A.N.] limit of if per batman
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On Mittwoch, 25. Januar 2017 08:15:52 CET Sven Eckelmann wrote:
[...]
> > this made me curious , and i modified your script a bit - turns out
> > after the 127. IF you add to batman-adv you get an Error -
> > all 510 gretap links was succesfully build ...
> > # ifconfig |grep gre| wc -l
> > 515
> > # batctl if|sort|wc -l
> > 127
> > the error is mainly
> > *Error - can't write to file
> > '/sys/class/net/gre128/batman_adv/mesh_iface': Cannot allocate memory
> [...]
[...]
> I would guess that your system mostly fails becauseit  cannot handle the
> allocation of the "large" arrays which store:
[...]

Looks like their could also be a different problem when your test system us=
es=20
signed characters by default. Please try the patch [1] which changes the ty=
pe=20
from=20char/s16 to unsigned int.

Kind regards,
	Sven

[1] https://patchwork.open-mesh.org/patch/17247/
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