Date: Thu, 2 Mar 2006 00:25:35 +0100
From: Olivier Galibert <galibert@pobox.com>
To: Greg KH <greg@kroah.com>
Cc: Ren? Rebe <rene@exactcode.de>, linux-kernel@vger.kernel.org
Subject: Re: MAX_USBFS_BUFFER_SIZE
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	Greg KH <greg@kroah.com>, Ren? Rebe <rene@exactcode.de>,
	linux-kernel@vger.kernel.org
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On Wed, Mar 01, 2006 at 02:41:23PM -0800, Greg KH wrote:
> On Wed, Mar 01, 2006 at 11:34:30PM +0100, Olivier Galibert wrote:
> > As a data point, I have traces of a scanner session including a
> > download of a 26Mb binary image using 524288 bytes logical blocks
> > physically transferred with 61440 bytes bulk_in frames.  Seems stable
> > enough.  IIRC the scanner-side controller chip has some advanced
> > buffering just to handle that kind of bandwidth.
> 
> That's impressive.  What are the endpoint sizes on the device that did
> this?

Hmmm, the chip is a Genesys gl841, on a canonscan lide 35.  And it
advertises a 64 bytes wMaxPacketSize on both in and out bulk
interfaces.  Go figure.

Want the log and/or the lsusb -v?

  OG.
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