[Bridge] [PATCH net-next v2] bridge: vlan: allow to suppress local mac install for all vlans
roopa
roopa at cumulusnetworks.com
Thu Aug 27 04:57:19 UTC 2015
On 8/26/15, 4:33 AM, Nikolay Aleksandrov wrote:
>> On Aug 25, 2015, at 11:06 PM, David Miller <davem at davemloft.net> wrote:
>>
>> From: Nikolay Aleksandrov <nikolay at cumulusnetworks.com>
>> Date: Tue, 25 Aug 2015 22:28:16 -0700
>>
>>> Certainly, that should be done and I will look into it, but the
>>> essence of this patch is a bit different. The problem here is not
>>> the size of the fdb entries, it’s more the number of them - having
>>> 96000 entries (even if they were 1 byte ones) is just way too much
>>> especially when the fdb hash size is small and static. We could work
>>> on making it dynamic though, but still these type of local entries
>>> per vlan per port can easily be avoided with this option.
>> 96000 bits can be stored in 12k. Get where I'm going with this?
>>
>> Look at the problem sideways.
> Oh okay, I misunderstood your previous comment. I’ll look into that.
>
I just wanted to add the other problems we have had with keeping these
macs (mostly from userspace POV):
- add/del netlink notification storms
- and large netlink dumps
In addition to in-kernel optimizations, will be nice to have a solution
that reduces the burden on userspace. That will need a newer netlink
dump format for fdbs. Considering all the changes needed, Nikolays patch
seems less intrusive.
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