Re: New USB stack on FreeBSD w/Linux emulation layer coming
Alan Stern <[email protected]>
| Newsgroups | gmane.linux.usb.devel |
|---|---|
| Message-ID | <[email protected]> |
On Fri, 18 May 2007, Hans Petter Selasky wrote: > > It occurred to me last night that you could accomplish what you want > > without any change to the Linux drivers at all. Just change the > > FreeBSD stack so that it preallocates one or two transfers for every > > endpoint at the time the endpoint is enabled -- that is, whenever the > > stack sends a Set-Configuration or Set-Interface request. > > > > That is correct. But where do I get information about the buffer-size to use? > Choosing the wrong buffer size can limit performance or waste memory. Yes, that is a problem. It's made even worse by the fact that the drivers themselves frequently do not know in advance the buffer sizes they will use. Alan Stern ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel