On Tue, Jun 15, 2004, Duncan Sands <[EMAIL PROTECTED]> wrote: > On Tuesday 15 June 2004 18:01, David Brownell wrote: > > Duncan Sands wrote: > > >>Are there plans to replace usbfs with sysfs, or increase sysfs's > > >>functionality (e.g. I/O with device endpoints)? > > > > > > > > > I have a plan to rewrite usbfs along the lines of gadgetfs. > > > > How much of a plan? :) > > More of a desire than a plan :) I wanted to first clean up the existing > usbfs a bit, in order to understand it better, then design usbfs2. I'm > at the beginning of the cleaning phase. > > > I have some notes about what I think "usbfs2" should > > probably do. With more questions than answers, to be > > honest! Because "more like gadgetfs" only gets part > > way into the problem. Would it help if I posted that? > > Please do.
I'll pipe up with a request. Larger buffers for URB operations. People are having problems getting maximum performance with USB 2.0 devices out of userspace. The synchronous USB bulk call has a maximum of the page size (4KB on x86), and the URB call has a maximum of 16KB. Neither is large enough to get the best performance. Would anyone accept a patch to increase the maximum buffer size in the existing usbfs? JE ------------------------------------------------------- This SF.Net email is sponsored by The 2004 JavaOne(SM) Conference Learn from the experts at JavaOne(SM), Sun's Worldwide Java Developer Conference, June 28 - July 1 at the Moscone Center in San Francisco, CA REGISTER AND SAVE! http://java.sun.com/javaone/sf Priority Code NWMGYKND _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
