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Subject: Re: Cruel and unusual problems with Proliant ML350
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Jeremy Chadwick wrote:
> On Mon, Nov 13, 2006 at 05:33:24PM +0100, Oliver Fromme wrote:
>> If it's really only a web server, then you probably don't
>> need the USB ports.  In that case you should remove ohci
>> and ehci from your kernel.  The USB interrupt handler is
>> quite heavy-weight, so it can have a noticeable impact if
>> the interrupt is shared with other devices.
> 
> I'll agree with this (re: webservers not needing USB), except in
> regards to one item: keyboards.

Yup. And iLO. In fact, it appears that there's some builtin connection
between USB, iLO, ethernet and ciss - changing IRQ of one of them in
BIOS changes it for all of them :(

> finished remove the keyboard and leave.  PS/2 was never intended
> to be hot-swappable, and as I'm sure many can attest to, removing

And it's shaped worse than USB.

> Summary: ukbd is one reason USB is useful on servers.

Yes. From what I can see, these days the number of servers *without any*
PS/2 connectors is passing 50%.