Re: [RFC PATCH 1/2] smp: Implement serialized smp_call_function APIs

[Mathieu Desnoyers]

On 2024-03-13 17:19, Linus Torvalds wrote:
> On Wed, 13 Mar 2024 at 13:56, Mathieu Desnoyers
> <mathieu.desnoyers@xxxxxxxxxxxx> wrote:
> > Introduce serialized smp_call_function APIs to limit the number of
> > concurrent smp_call_function IPIs which can be sent to a given CPU to a
> > maximum of two: one broadcast and one specifically targeting the CPU.
>
> So  honestly, with only one user, I think the serialization code
> should be solidly in that one user, not in kernel/smp.c.

Good point, unless other users of this show up, I could move it
into membarrier.c. But only if anyone cares enough to come up
with benchmarks justifying the added complexity.

> Also, this kind of extra complexity does require numbers to argue for it.

Of course,

Thanks,

Mathieu

>               Linus

--
Mathieu Desnoyers
EfficiOS Inc.
https://www.efficios.com