Date: Fri, 24 Aug 2007 14:53:51 -0700 From: "Kevin Oberman" <oberman@es.net> To: John Baldwin <jhb@freebsd.org> Cc: freebsd-acpi@freebsd.org, William Grzybowski <william88@gmail.com> Subject: Re: msk dev problem with acpi Message-ID: <20070824215351.D089E4506A@ptavv.es.net> In-Reply-To: Your message of "Fri, 24 Aug 2007 12:41:38 EDT." <200708241241.39187.jhb@freebsd.org>
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--==_Exmh_1187992431_46671P Content-Type: text/plain; charset=us-ascii Content-Disposition: inline > From: John Baldwin <jhb@freebsd.org> > Date: Fri, 24 Aug 2007 12:41:38 -0400 > Sender: owner-freebsd-acpi@freebsd.org > > On Thursday 23 August 2007 07:39:40 pm Nate Lawson wrote: > > > So the question is what to do in the first case -- it seems easiest that > > if a bridge has no resources, just pass everything up to the parent. Is > > that what you're recommending, John? > > Well, sorta. The bridge needs to allocate resources and then hand them down > to its children, but while this simple case is doable, the harder case is > when you have multiple devices and no bridge resources, or you have bridge > resources that aren't enough for all the devices you have, etc. Really > fixing this requires that we do an early pass assigning resources to busses > before any "leaf" drivers probe (but after all the bridges have probed), but > for that we really need the multi-pass new-bus stuff. Sorry for a slight hijack of the thread, but I am wondering if this is the reason that USB disks get attached to a UHCI interface if they are already connected before umass and usb are loaded into the kernel as UHCI is always loaded first, ohci second and ehci is last. I suspect that this has happened to others without them ever realizing it. They may have been annoyed by the slow devices just blamed hardware and "crappy USBs". -- R. Kevin Oberman, Network Engineer Energy Sciences Network (ESnet) Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab) E-mail: oberman@es.net Phone: +1 510 486-8634 Key fingerprint:059B 2DDF 031C 9BA3 14A4 EADA 927D EBB3 987B 3751 --==_Exmh_1187992431_46671P Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (FreeBSD) Comment: Exmh version 2.5 06/03/2002 iD8DBQFGz1Nvkn3rs5h7N1ERAvC2AJ0fRYtrusWRU/pSPfZFF27M9OkuEwCeKGJc l8d7cuTXeJFX2aJZeg9RTlE= =yNyd -----END PGP SIGNATURE----- --==_Exmh_1187992431_46671P--
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