Re: [PATCH v3] vmstat: Kernel stack usage histogram

[Shakeel Butt]

On Thu, May 30, 2024 at 08:14:17PM GMT, Pasha Tatashin wrote:
> Hi Shakeel,
> 
> > Couple of questions:
> >
> > 1. In future with your on-demand kstack allocation feature, will these
> > metrics still be useful? (I think so but I want to know your take)
> 
> It depends on how on-demand allocation is implemented. On hardware
> that supports faults on kernel stacks,

Which hardware supports faults on kernel stacks and which do not?

> we will have other metrics that
> show the total number of pages allocated for stacks.

Don't we already have a metric for that i.e. KernelStack in meminfo
which is in kB unit?

One more question: Is there any concern in making
CONFIG_DEBUG_STACK_USAGE not a debug feature i.e. enable in default
kernels instead of just debug kernels?

thanks,
Shakeel