From: roopa <roopa@cumulusnetworks•com>
To: Nikolay Aleksandrov <nikolay@cumulusnetworks•com>
Cc: David Miller <davem@davemloft•net>,
netdev@vger•kernel.org, vyasevic@redhat•com,
toshiaki.makita1@gmail•com, stephen@networkplumber•org,
bridge@lists•linux-foundation.org, wkok@cumulusnetworks•com
Subject: Re: [PATCH net-next v2] bridge: vlan: allow to suppress local mac install for all vlans
Date: Wed, 26 Aug 2015 21:57:19 -0700 [thread overview]
Message-ID: <55DE98AF.8000503@cumulusnetworks.com> (raw)
In-Reply-To: <AB16F445-DCA7-437E-B6E1-B70FDC63E55A@cumulusnetworks.com>
On 8/26/15, 4:33 AM, Nikolay Aleksandrov wrote:
>> On Aug 25, 2015, at 11:06 PM, David Miller <davem@davemloft•net> wrote:
>>
>> From: Nikolay Aleksandrov <nikolay@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.
next prev parent reply other threads:[~2015-08-27 4:57 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-26 0:34 [PATCH net-next v2] bridge: vlan: allow to suppress local mac install for all vlans Nikolay Aleksandrov
2015-08-26 0:56 ` Stephen Hemminger
2015-08-26 5:42 ` Nikolay Aleksandrov
2015-08-26 0:58 ` Stephen Hemminger
2015-08-26 2:42 ` David Miller
2015-08-26 5:28 ` Nikolay Aleksandrov
2015-08-26 6:06 ` David Miller
2015-08-26 11:33 ` Nikolay Aleksandrov
2015-08-27 4:57 ` roopa [this message]
2015-08-27 21:02 ` Nikolay Aleksandrov
2015-08-27 23:47 ` Vlad Yasevich
2015-08-28 2:17 ` Nikolay Aleksandrov
2015-08-28 12:31 ` Vlad Yasevich
2015-08-28 15:26 ` Nikolay Aleksandrov
2015-08-29 1:11 ` Vlad Yasevich
2015-09-13 13:22 ` Nikolay Aleksandrov
2015-08-26 6:10 ` B Viswanath
2015-08-26 12:52 ` Vlad Yasevich
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