157k interrupts per second causing 60% CPU load on idle system

[Matt Thyer]

On 23 March 2012 01:16, Mike Tancsa <mike at sentex.net> wrote:

> Sorry, what I was getting at was that a bad bios (eg latest could have
> introduced a regression) can cause the symptoms you are seeing. The bios
> change sure seemed to fix my problem.
>

I've updated the firmware of the SuperMicro AOC-USAS2-L8i to the latest -IT
firmware on the Supermicro FTP site (this is version 11 and I was on 7
before) but this made no difference.

I then tried downgrading the motherboard BIOS to the F3 release that I was
running previously but again this made no difference.

So it would seem that this is a problem is to do with a change in
FreeBSD-STABLE between r225723 and r232477.

I'm wondering whether this is due to the new LSI authored driver for chips
such as the LSI SAS2008 that are used in the SuperMicro AOC-USAS2-L8i.

I know this driver is in CURRENT but do not know if it's in 8-STABLE.

Does anyone know if and when this driver was merged from current to
8-STABLE ?

If I can work out what revision that occurred in I'll go back to just
before then to confirm if the problem exists.

Matt