Re: kvm aio wishlist

[Ingo Molnar <mingo@elte.hu>]

* Avi Kivity <avi@redhat.com> wrote:

> Perhaps a variant of syslet, that is kernel-only, and does:
>
> - always allocate a new kernel stack at io_submit() time, but not a 
>   new thread

such a N:M threading design is a loss - sooner or later we arrive to a 
point where people actually start using it and then we want to 
load-balance and schedule these entities.

So i'd suggest the kthread based async engine i wrote for syslets. It 
worked well and for kernel-only entities it schedules super-fast - it 
can do up to 20 million events per second on a 16-way box i'm testing 
on. The objections about syslets were not related to the scheduling of 
it but were mostly about the userspace API/ABI: you dont have to use 
that.

	Ingo