Re: High CPU usage (up to server hang) under heavy I/O load

Matt Domsch
2004-08-16T12:44:19Z

On Sun, Aug 15, 2004 at 10:30:57PM +0200, Sylvain COUTANT wrote:
> > What driver are you using for the PERC?
>
> Megaraid "2". As far as I know, in newer kernels, this is the only one
> compiled in. We have had several problems with the previous one. Also, Matt
> Domsch's page state the exact versions you need depending on your system.
>
> Our 1750's work very well using RAID PERC4/DI under 2.4.26's megaraid
> driver. Although they are not really stressed ...
>
> > I've been wanting to try the 'megaraid2' driver
>
> Hopefully, Matt will send his advice on the subject, but I think you should
> try this asap.

All PERC4-series adapters should really use 'megaraid2' in 2.4.x, and
as far as we know, megaraid2 handles all previous LSI-based adapters
just fine too. In 2.6.x, there is only one driver 'megaraid', which
is the megaraid2 code base - no need for an older driver there.

Thanks,
Matt

--
Matt Domsch
Sr. Software Engineer, Lead Engineer
Dell Linux Solutions linux.dell.com & www.dell.com/linux
Linux on Dell mailing lists @ http://lists.us.dell.com