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From: Greg KH <greg@kroah.com>
To: Alan Stern <stern@rowland.harvard.edu>
Cc: Bodo Eggert <7eggert@gmx.de>, Lee Revell <rlrevell@joe-job.com>,
	linux-kernel <linux-kernel@vger.kernel.org>,
	linux-usb-devel@lists.sourceforge.net
Subject: Re: [PATCH] USB_BANDWIDTH documentation change
Date: Mon, 26 Dec 2005 20:17:47 -0800	[thread overview]
Message-ID: <20051227041747.GA23916@kroah.com> (raw)
In-Reply-To: <Pine.LNX.4.44L0.0512261731001.10595-100000@netrider.rowland.org>

On Mon, Dec 26, 2005 at 05:35:29PM -0500, Alan Stern wrote:
> On Mon, 26 Dec 2005, Bodo Eggert wrote:
> 
> > On Mon, 26 Dec 2005, Lee Revell wrote:
> > > On Mon, 2005-12-26 at 11:25 +0100, Bodo Eggert wrote:
> > 
> > > > Document the current status of CONFIG_USB_BANDWITH implementation.
> > > 
> > > Since most systems use uhci-hcd and/or ehci-hcd maybe we should just
> > > mark it BROKEN?  Or EXPERIMENTAL?
> > 
> > It is EXPERIMENTAL, but the current documentation sounds like "YOU REALLY
> > WANT THIS !!!1", and I /guess/ that would be true for ohci-hcd users.
> 
> CONFIG_USB_BANDWIDTH isn't _really_ needed.  What it does (or rather, what 
> it would do if it worked properly) is prevent the kernel from 
> overcommitting on USB bandwidth.

I just saw (but can't find again, sorry) a gentoo bug of an external usb
driver on x86-64 that oopses _unless_ this config option is set.  So for
some people it is necessary and not broken.

thanks,

greg k-h

  reply	other threads:[~2005-12-27  4:20 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-12-26 10:25 [PATCH] USB_BANDWIDTH documentation change Bodo Eggert
2005-12-26 15:06 ` Lee Revell
2005-12-26 21:49   ` Bodo Eggert
2005-12-26 22:35     ` Alan Stern
2005-12-27  4:17       ` Greg KH [this message]
2005-12-27 17:02         ` [linux-usb-devel] " David Brownell
2005-12-27 16:57       ` David Brownell
2005-12-29 19:41         ` EHCI TT bandwidth (was Re: [PATCH] USB_BANDWIDTH documentation change) Dan Streetman
2005-12-29 20:05           ` Lee Revell
2005-12-30 19:13             ` [linux-usb-devel] " Dan Streetman
2005-12-30 19:16               ` Lee Revell
2005-12-29 20:12           ` David Brownell
2005-12-30  0:56             ` Dan Streetman

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