Re: [PATCH] ipv4: Namespaceify tcp_max_orphans knob

From: 严海双
Date: Fri Sep 08 2017 - 21:26:09 EST

> On 2017年9月9日, at 上午6:13, Cong Wang <xiyou.wangcong@xxxxxxxxx> wrote:
> On Wed, Sep 6, 2017 at 8:10 PM, Haishuang Yan
> <yanhaishuang@xxxxxxxxxxxxxxxxxxxx> wrote:
>> Different namespace application might require different maximal number
>> of TCP sockets independently of the host.
> So after your patch we could have N * net->ipv4.sysctl_tcp_max_orphans
> in a whole system, right? This just makes OOM easier to trigger.

>From my understanding, before the patch, we had N * net->ipv4.sysctl_tcp_max_orphans,
and after the patch, we could have ns1.sysctl_tcp_max_orphans + ns2.sysctl_tcp_max_orphans
+ ns3.sysctl_tcp_max_orphans, is that right? Thanks for your reviewing.