Re: 3ware bad write speed.

On Wed, 26 Mar 2003 at 1:40am, Stephan van Hienen wrote

> On Mon, 24 Mar 2003, Joshua Baker-LePain wrote:
> 
> > 2) Make sure that your kernel supports HIGHIO.  I don't know if that
> > enterprise kernel does (do you need to run it?), but it makes a *big*
> > difference.  The latest 3ware drivers support HIGHIO, but the kernel needs
> > to as well.
> 
> what is this HIGHIO (patch?) ?

>From Documentation/Configure.help:

HIGHMEM I/O support
CONFIG_HIGHIO
  If you want to be able to do I/O to high memory pages, say Y.
  Otherwise low memory pages are used as bounce buffers causing a
  degrade in performance.

It's in mainline as of 2.4.20, and I know that RH has included it for a 
while.

-- 
Joshua Baker-LePain
Department of Biomedical Engineering
Duke University

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