Messages in this thread | | | Date | Sat, 06 Nov 2010 10:08:44 -0700 | From | Ben Greear <> | Subject | Re: OOM when adding ipv6 route: How to make available more per-cpu memory? |
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On 11/06/2010 12:26 AM, Eric Dumazet wrote: > Le vendredi 05 novembre 2010 à 17:07 -0700, Ben Greear a écrit : > >> We just tried creating 1000 macvlans with IPv6 addrs on a 64-bit machine >> with 12GB RAM. Only around 520 interfaces properly set their IPs, and >> again there are errors about of-of-memory from 'ip', but no obvious >> splats in dmesg. >> >> 'top' shows 10G or so free. >> >> It will take some time to figure out what exactly is returning >> the ENOMEM.... > > At least, nothing to do with percpu stuff ?
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.
Thanks, Ben
-- Ben Greear <greearb@candelatech.com> Candela Technologies Inc http://www.candelatech.com -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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