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From: Cong Wang <xiyou.wangcong@gmail.com>
To: David Ahern <dsahern@gmail.com>
Cc: David Miller <davem@davemloft.net>,
	Linux Kernel Network Developers <netdev@vger.kernel.org>,
	nikita.leshchenko@oracle.com,
	Roopa Prabhu <roopa@cumulusnetworks.com>,
	Stephen Hemminger <stephen@networkplumber.org>,
	Ido Schimmel <idosch@mellanox.com>,
	Jiri Pirko <jiri@mellanox.com>,
	Saeed Mahameed <saeedm@mellanox.com>,
	Alexander Aring <alex.aring@gmail.com>,
	linux-wpan@vger.kernel.org,
	NetFilter <netfilter-devel@vger.kernel.org>,
	LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH RFC/RFT net-next 00/17] net: Convert neighbor tables to per-namespace
Date: Thu, 19 Jul 2018 10:12:23 -0700
Message-ID: <CAM_iQpW4-JkZY7jXx0Q1b907hQ85UOL1eXv2YHwSukb5L=apUg@mail.gmail.com> (raw)
In-Reply-To: <28c30574-391c-b4bd-c337-51d3040d901a@gmail.com>

On Thu, Jul 19, 2018 at 9:16 AM David Ahern <dsahern@gmail.com> wrote:
>
> Chatting with Nikolay about this and he brought up a good corollary - ip
> fragmentation. It really is a similar problem in that memory is consumed
> as a result of packets received from an external entity. The ipfrag
> sysctls are per namespace with a limit that non-init_net namespaces can
> not set high_thresh > the current value of init_net. Potential memory
> consumed by fragments scales with the number of namespaces which is the
> primary concern with making neighbor tables per namespace.

Nothing new, already discussed:
https://marc.info/?l=linux-netdev&m=140391416215988&w=2

:)

  reply index

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-07-17 12:06 dsahern
2018-07-17 12:06 ` [PATCH RFC/RFT net-next 01/17] net/ipv4: rename ipv4_neigh_lookup to ipv4_dst_neigh_lookup dsahern
2018-07-17 12:06 ` [PATCH RFC/RFT net-next 02/17] net/neigh: export neigh_find_table dsahern
2018-07-17 12:06 ` [PATCH RFC/RFT net-next 03/17] net/ipv4: wrappers for arp table references dsahern
2018-07-17 12:06 ` [PATCH RFC/RFT net-next 04/17] net/ipv4: Remove open coded use of arp table dsahern
2018-07-17 12:06 ` [PATCH RFC/RFT net-next 05/17] net/ipv6: wrappers for neighbor table references dsahern
2018-07-17 12:06 ` [PATCH RFC/RFT net-next 06/17] net/ipv6: Remove open coded use of neighbor table dsahern
2018-07-17 12:06 ` [PATCH RFC/RFT net-next 07/17] drivers/net: remove open coding of neighbor tables dsahern
2018-07-17 12:06 ` [PATCH RFC/RFT net-next 08/17] net: Remove nd_tbl from ipv6 stub dsahern
2018-07-17 12:06 ` [PATCH RFC/RFT net-next 09/17] net: Remove arp_tbl and nd_tbl from headers dsahern
2018-07-17 12:06 ` [PATCH RFC/RFT net-next 10/17] net: Add key_len to neighbor constructor dsahern
2018-07-17 12:06 ` [PATCH RFC/RFT net-next 11/17] net: Change neigh_table_init and neigh_table_clear signature dsahern
2018-07-17 12:06 ` [PATCH RFC/RFT net-next 12/17] net/neigh: Change neigh_xmit to take an address family dsahern
2018-07-17 12:06 ` [PATCH RFC/RFT net-next 13/17] net/neighbor: Convert internal functions away from neigh_tables dsahern
2018-07-17 12:06 ` [PATCH RFC/RFT net-next 14/17] net/ipv4: Convert arp table to per namespace dsahern
2018-07-17 12:06 ` [PATCH RFC/RFT net-next 15/17] net/ipv6: Convert neighbor table to per-namespace dsahern
2018-07-17 12:06 ` [PATCH RFC/RFT net-next 16/17] net/decnet: Move " dsahern
2018-07-17 12:06 ` [PATCH RFC/RFT net-next 17/17] net/neighbor: Remove neigh_tables and NEIGH enum dsahern
2018-07-17 17:40 ` [PATCH RFC/RFT net-next 00/17] net: Convert neighbor tables to per-namespace Cong Wang
2018-07-17 17:43   ` David Ahern
2018-07-17 17:53     ` Cong Wang
2018-07-17 19:02       ` David Ahern
2018-07-17 20:37         ` Cong Wang
2018-07-18  3:59         ` David Miller
2018-07-19 16:16           ` David Ahern
2018-07-19 17:12             ` Cong Wang [this message]
2018-07-24 15:14               ` David Ahern
2018-07-24 17:14                 ` David Miller
2018-07-25 18:23                   ` David Ahern
2018-07-24 22:09                 ` Cong Wang
2018-07-25 12:33                   ` Eric W. Biederman
2018-07-25 14:06                     ` David Ahern
2018-07-25 17:38                       ` Eric W. Biederman
2018-07-25 18:13                         ` David Ahern
2018-07-25 19:17                           ` Eric W. Biederman
2018-08-13 21:48                             ` David Ahern
2018-08-15  4:36                               ` Eric W. Biederman
2018-07-26 11:12                         ` David Laight
2018-07-27 16:27                           ` Eric W. Biederman
2018-07-19  0:54 ` Michael Richardson
2018-07-19 15:49   ` David Ahern
2018-08-12  6:46 ` [RFC/RFT, net-next, " Vasily Averin
2018-08-12 17:37   ` David Ahern

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