fc5 kernels after 1788 have excessive, kernel overhead

[Andy Burns]

Dave Jones wrote:

> my people page will have a new kernel with it turned off in about
> an hour (buildsys permitting).

Got it thanks, you can certainly feel the difference :-)
my previous wget now gets an "expected" 11.1MB/s and eats about 25% CPU 
(which feels a bit on the high side)

One weird note though, I accidentally installed the 1806 uniprocessor 
i686 kernel, and when it booted it didn't see the SATA drives

ata1 is slow to respond, please be patient
ata1 failed to respond (30 secs)
scsi0 : ahci
ata2 is slow to respond, please be patient
ata2 failed to respond (30 secs)
scsi1 : ahci

http://adslpipe.co.uk/nosata.jpg it happened twice so no fluke.

I suppose the subsequent panic is justified given that it didn't see the 
disks, but why would it not see them? I rebooted back to 1805 smp i686 
kernel, installed 1806 smp i686 kernel and now all is well, I can double 
check the uniprocessor result if required ...