Very low disk performance on 5.x

[Poul-Henning Kamp]

In message <427E0E87.1040701 at samsco.org>, Scott Long writes:

>The solution is to re-engineer the way that I/O buffers pass through
>the kernel and only assign KVA when needed (for doing software parity
>calculations, for example).

I've hacked up a prototype to do this and there is no doubt that this
is the way we are headed, hopefully sometime in the 7-CURRENT period.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.