Re: [PATCH V4] perf: event preserve and create across cpu hotplug

[Mukesh Ojha]

On 6/18/2019 5:53 PM, Peter Zijlstra wrote:
> On Tue, Jun 18, 2019 at 02:24:51PM +0530, Mukesh Ojha wrote:
> > Perf framework doesn't allow preserving CPU events across
> > CPU hotplugs. The events are scheduled out as and when the
> > CPU walks offline. Moreover, the framework also doesn't
> > allow the clients to create events on an offline CPU. As
> > a result, the clients have to keep on monitoring the CPU
> > state until it comes back online.
> >
> > Therefore,
> That's not a therefore. There's a distinct lack of rationale here. Why
> do you want this?

Thanks Peter for coming back on this.

Missed to send the coverletter,
https://lkml.org/lkml/2019/5/31/438
Will resend this with coverletter.

Btw, This patch

is based on suggestion given by you on this
https://lkml.org/lkml/2018/2/16/763


Thanks.
Mukesh


Thanks.
Mukesh