Date: Mon, 22 May 2006 20:37:13 +0200 From: "Daan Vreeken [PA4DAN]" <Danovitsch@vitsch.net> To: "Dag-Erling =?iso-8859-1?q?Sm=F8rgrav?=" <des@des.no> Cc: Arch@freebsd.org, Sergey Matveychuk <sem@freebsd.org>, Robert Watson <rwatson@freebsd.org>, Freebsd-USB@freebsd.org, Hans Petter Selasky <hselasky@c2i.net> Subject: Re: Resend with subject: No more non-MPSAFE network device drivers, please! Message-ID: <200605222037.14030.Danovitsch@vitsch.net> In-Reply-To: <86y7wum9ow.fsf@xps.des.no> References: <20060522144542.T21787@fledge.watson.org> <20060522145953.I21787@fledge.watson.org> <86y7wum9ow.fsf@xps.des.no>
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On Monday 22 May 2006 16:10, Dag-Erling Sm=F8rgrav wrote: > Robert Watson <rwatson@FreeBSD.org> writes: > > Per discussion at the developer summit, a significant rewrite of the > > USB code is needed to make it MPSAFE. Volunteers welcome. > > HP Selasky claims to have a working Giant-free USB stack: (added him to the 'cc' list) > http://www.turbocat.net/~hselasky/usb4bsd/index.html > > No idea how well it works, though. I have been running his USB driver on a production server for months here=20 without a single problem. I use his ugen implementation to communicate with= a=20 custom made USB device. On FreeBSD's USB driver a stress test would fail=20 after max 40,000 requests. With his USB driver I have successfully made ove= r=20 30,000,000 requests before stopping the test manually. There is a problem with his code though. (At least, there was back when I l= ast=20 looked at it, correct me if I'm wrong.) He has completely rewritten the OHC= I,=20 UHCI and EHCI parts, but kept the original (network, storage, etc) drivers.= =20 =46or the original drivers to work he has added some wrapper functions. Bac= k=20 when I looked these wrappers didn't work out of the box for the devices I=20 have tried. All "old" drivers need to be converter to "new world order" for them to wor= k=20 properly. That's the only problem I have been having with his driver : You get a bett= er=20 USB stack, but with less working drivers. I think it would be great to get his code into -current, but some developer= s=20 would have to help out to convert the existing drivers. =2D- Daan
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