PVSCSI vs LSI Logic Parallel/SAS - WAS: Re: [gentoo-user] Best filesystem for virtualized gentoo mail server - WAS: vmWare HowTo / best practices

[Tanstaafl]

On 2013-04-22 8:56 AM, Andre Lucas Falco <alfalco@×××××.com> wrote:
> 2013/4/21 Tanstaafl <tanstaafl@×××××××××××.org> wrote:
>> Windows VMs see get an 'LSI Logic SAS', and my gentoo VM gets an
>> 'LSI Logic Parallel' controller.

> Did you tested using pvscsi? It's improve performance with less cost to
> CPU usage.

No, I didn't...

It appears there is pvscsi support in the mainline linux kernel, but is 
it rock-solid? Anyone else here running gentoo linux with this driver 
for their primary/boot disk controller?

Also, for my windows server 2008r2 vms, I used the default, which was 
the LSI SAS... I did search and found the knowledgebase article 
describing how to change them, but is the gain really worth the trouble 
(and more importantly, the risk)?