> On 2017年9月9日, at 下午12:35, Cong Wang <xiyou.wangc...@gmail.com> wrote: > > On Fri, Sep 8, 2017 at 6:25 PM, 严海双 <yanhaishu...@cmss.chinamobile.com> wrote: >> >> >>> On 2017年9月9日, at 上午6:13, Cong Wang <xiyou.wangc...@gmail.com> wrote: >>> >>> On Wed, Sep 6, 2017 at 8:10 PM, Haishuang Yan >>> <yanhaishu...@cmss.chinamobile.com> 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. > > Nope, by N I mean the number of containers. Before your patch, the limit > is global, after your patch it is per container. >
Yeah, for example, if there is N containers, before the patch, I mean the limit is: N * net->ipv4.sysctl_tcp_max_orphans After the patch, the limit is: ns1. net->ipv4.sysctl_tcp_max_orphans + ns2. net->ipv4.sysctl_tcp_max_orphans + …