Re: [PATCH v2 00/13] Dynamic Kernel Stacks

[Zach O'Keefe]

Hey Hans,

> 1 PiB for a fleet only makes sense in the context of the size of that fleet.

Of course! But that _is_ a real fleet, not a hypothetical one -- and I
don't see too many news articles about hyperscalers downsizing :)

> But it's more than that.
>
> You WILL slow down the general case by this stuff, and so how much actual gain does this imply? What is the mark needed to even get to a break-even point?

You're absolutely right! Per Thomas' earlier comment, performance
analysis is due. This is a chicken-before-the-egg problem: we can't
get the data until we have a PoC to work with. We are looking to
engage with upstream early in the project, to determine what a PoC
ought to look like. It benefits no one to invest time and money doing
the reverse. I'd be more than delighted to get these numbers, once we
have a feasible (if conditional) path forward.

> To be honest, this and the multikernel proposal are the worst motivated massive changes for no demonstrated value I have seen in a very, very long time.

;) Glad I get to be memorable!

Appreciate your thoughts, and have a great weekend,
Zach