Date: Sat, 7 Feb 2009 00:32:18 +0000 From: Thomas Sparrevohn <Thomas.Sparrevohn@btinternet.com> To: freebsd-usb@freebsd.org Subject: Re: HEADSUP usb2/usb4bsd to become default in GENERIC Message-ID: <200902070032.18792.Thomas.Sparrevohn@btinternet.com> In-Reply-To: <20090206.081901.1923806177.imp@bsdimp.com> References: <20090206045349.GQ78804@elvis.mu.org> <20090206.081901.1923806177.imp@bsdimp.com>
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On Friday 06 February 2009 15:19:01 M. Warner Losh wrote: > Doesn't the busdma issue need to be solved before we do this? usb2 > currently doesn't work if you have memory above 4GB due to this > issue. I thought we tagged it as a show stopper for making it the > default. > > Warner To be honst - I stongly recommend that it's fixed before. I know the problem is not related to the USB2 stack as such - However the way the problem occurs e.g. a corruption in the ATA dma load make it far from clear that it's a USB bounce buffer problem and my error reports was generally ignored with the - there nothing wrong with the ATA code - quite correctly as it turned out but - it kept me using an old kernel before the old brain got around to thinking about USB So I would love to see it fixed and I am not quite sure what the hold up is? Last time I heard - we seemed to be caugth in between - a double "there nothing wrong with the dma code" and "that is the way USB works" ;-) I am sure there is more to it however ;-0) Regards T.
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