Hello, guys. On Fri, Sep 12, 2014 at 07:18:09PM +0200, Michal Hocko wrote: > On Fri 12-09-14 19:26:58, Vladimir Davydov wrote: > > memory.kmem.tcp.limit_in_bytes works as the system-wide tcp_mem sysctl, > > but per memory cgroup. While the existence of the latter is justified > > (it prevents the system from becoming unusable due to uncontrolled tcp > > buffers growth) the reason why we need such a knob in containers isn't > > clear to me. > > Parallels was the primary driver for this change. I haven't heard of > anybody using the feature other than Parallels. I also remember there > was a strong push for this feature before it was merged besides there > were some complains at the time. I do not remember details (and I am > one half way gone for the weekend now) so I do not have pointers to > discussions. > > I would love to get rid of the code and I am pretty sure that networking > people would love this go even more. I didn't plan to provide kmem.tcp.* > knobs for the cgroups v2 interface but getting rid of it altogether > sounds even better. I am just not sure whether some additional users > grown over time. > Nevertheless I am really curious. What has changed that Parallels is not > interested in kmem.tcp anymore? So, I'd love to see this happen too but I don't think we can do this. People use published interface. The usages might be utterly one-off and mental but let's please not underestimate the sometimes senseless creativity found in the wild. We simply can't remove a bunch of control knobs like this. Thanks. -- tejun -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>