Re: patch to shift memory allocations to usb_alloc_urb()
Alan Stern <[email protected]>
| Newsgroups | gmane.linux.usb.devel |
|---|---|
| Message-ID | <[email protected]> |
On Sat, 7 Jul 2007, Oliver Neukum wrote: > This is very good and worth preserving. > > IMHO the storage driver should be optimized for EHCI. The others must > work, but the most important is EHCI. So this would point to dynamic > allocation of URBs with one preallocated URB to fall back to for the ENOMEM > case. > > This brings me to an idea. > Is it possible to accept the next scsi request while the current request is > being executed? That way, when the first request finishes, the URBs > could be retained if they are needed right away and otherwise freed. It's _possible_, but why go through all that work? Just keep the URBs allocated permanently. They don't take up much space compared with UHCI's TDs. 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