From mboxrd@z Thu Jan  1 00:00:00 1970
From: Eric Dumazet <eric.dumazet@gmail.com>
Subject: Re: Scalability of interface creation and deletion
Date: Sat, 07 May 2011 20:44:50 +0200
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To: Alex Bligh <alex@alex.org.uk>
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Le samedi 07 mai 2011 =C3=A0 19:38 +0100, Alex Bligh a =C3=A9crit :
>=20
> --On 7 May 2011 18:26:29 +0200 Eric Dumazet <eric.dumazet@gmail.com> =
wrote:
>=20
> ># time rmmod dummy
> >
> > real	0m0.111s
> > user	0m0.000s
> > sys	0m0.000s
> >
> >
> > This removed my two dummy0/dummy1 devices.
>=20
> rmmod dummy even with numdummies=3D100 does only one synchronize_net(=
) and
> is quick (0.8ms).
>=20

Yes, thanks to batching we added some time ago to speedup module unload=
=2E

And because you didnt setup IP addresses on them ;)

for i in `seq 0 99`
do
ifconfig dummy$i 192.168.$i.1 up
done