Messages in this thread | | | Subject | Re: OOM when adding ipv6 route: How to make available more per-cpu memory? | From | Eric Dumazet <> | Date | Mon, 08 Nov 2010 12:02:11 +0100 |
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Le samedi 06 novembre 2010 à 10:08 -0700, Ben Greear a écrit :
> At least I don't see any percpu dumps in dmesg. I vaguely remember > someone posting some ipv6 address scalability patches some time back. > I think they had to hack on /proc fs as well. I'll see if I can > dig those up. > > > Make sure udev / hotplug is not the problem, if you create your devices > > very fast. > > We can create the macvlans w/out problem, though I'm sure that could > be sped up. The problem is when we try to add IPv6 addresses to > them.
I see. Did you check /proc/sys/net/ipv6/ tunables ?
For example, I bet you need to make route/max_size a bigger value than default (4096)
Following is working for me
echo 16384 >/proc/sys/net/ipv6/route/max_size modprobe dummy numdummies=2000 for a in `seq 1 1999` do ip -6 add add 4444::444:$a/24 dev dummy$a done
ip -6 ro | wc -l 6008
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