Re: kvm aio wishlist

[Jens Axboe]

On Tue, Nov 25 2008, Ingo Molnar wrote:
> 
> * Avi Kivity <avi@xxxxxxxxxx> 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.

Still unsure why that stuff never got anywhere. Do you have a pointer to
the latest posting?

-- 
Jens Axboe

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/