Date: Mon, 13 Nov 2006 09:19:45 -0800 From: Jeremy Chadwick <koitsu@FreeBSD.org> To: freebsd-stable@FreeBSD.ORG, ivoras@fer.hr Subject: Re: Cruel and unusual problems with Proliant ML350 Message-ID: <20061113171945.GA26567@icarus.home.lan> In-Reply-To: <200611131633.kADGXO8J073080@lurza.secnetix.de> References: <ej2l2d$h42$1@sea.gmane.org> <200611131633.kADGXO8J073080@lurza.secnetix.de>
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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. More and more x86 PCs these days are expecting keyboards to be USB-based. Yes, PS/2 ports are still present on most (but not all) motherboards, but eventually that will be phased out. I like the idea of being able to go to my co-location facility and plug in a USB keyboard to begin working on a server, and when 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 or adding a PS/2 keyboard is generally frowned upon (it works here, it doesn't work there, etc.). I've seen some recent commits to the keyboard code which address being able to plug in a PS/2 keyboard while the machine is powered on (thus not having to reboot), for what it's worth. Summary: ukbd is one reason USB is useful on servers. -- | Jeremy Chadwick jdc at parodius.com | | Parodius Networking http://www.parodius.com/ | | UNIX Systems Administrator Mountain View, CA, USA | | Making life hard for others since 1977. PGP: 4BD6C0CB |
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