Can I use VFP in work queue context ?

[Woodruff, Richard]

> From: Nicolas Pitre [mailto:nico at fluxnic.net]
> Sent: Thursday, April 22, 2010 12:20 PM

> > If the work queue executes in a unique context it could follow the
> > same lazy strategy a user space one does.
>
> It could... but that begs the question: what is this that requires so
> much processing power within the kernel?  This really needs to be fully
> understood and justified before even considering a possible VFP usage in
> the kernel.

A simple candidate is Neon memory copy. It can perform much better than the ARM based one. There are a few unfortunate copies associated with some networking devices which see decent benefit.

Regards,
Richard W.