Hi
I'm using 2.4.18-3 (Redhat 7.3) . I have a USB 2.0 device which does DMA read and write. My problem is my dma usb read is very very slow. Is it because my kernel doesn't support bulk queuing for read?
When you say you have such a DMA device, what do you mean: (a) Linux in the host, (b) Linux in the device, or (c) Linux in both? So when you say "read" do you mean "IN" or "OUT" -- who's doing the READ?
All the "big three" (EHCI, OHCI, UHCI) Linux host controllers use DMA transparently, and support bulk queueing for read; always have. Some may be faster at it than others, mostly due to driver structure. The "usb-uhci" driver looked to be rather slow.
- Dave
------------------------------------------------------- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
