Re: [PATCH v5 1/3] perf: add PERF_RECORD_NAMESPACES to include namespaces related info

[Peter Zijlstra]

On Fri, Jan 20, 2017 at 09:26:32PM +0530, Hari Bathini wrote:
> Hi Peter,
> 
> 
> On Wednesday 18 January 2017 07:56 PM, Peter Zijlstra wrote:
> >On Tue, Jan 17, 2017 at 07:47:22PM +0530, Hari Bathini wrote:
> >>With the advert of container technologies like docker, that depend
> >>on namespaces for isolation, there is a need for tracing support for
> >>namespaces. This patch introduces new PERF_RECORD_NAMESPACES event
> >>for tracing based on namespaces related info.
> >This fails to mention the whole namespace of namespaces issue Eric
> 
> IIUC, Eric wanted to have device info saved for each namespace separately
> to avoid the need for a namespace of namespaces in future.
> 
> >brought up. Where are we on that, and or why isn't it required?
> 
> 
> I did address that in v4 and haven't changed it in v5.
> I am not sure if it needs any mentioning in the changelog..

I would certainly have liked mention of the issue and its (non)
solution. It shows we thought about it and will help our older selves
remember.