Hi!
What about this piece of documentation?
Pavel
--- clean/drivers/usb/usb-uhci.c Tue Jun 5 21:38:02 2001
+++ linux/drivers/usb/usb-uhci.c Fri Jun 8 11:03:44 2001
@@ -88,9 +88,25 @@
#define SLAB_FLAG (in_interrupt ()? SLAB_ATOMIC : SLAB_KERNEL)
#define KMALLOC_FLAG (in_interrupt ()? GFP_ATOMIC : GFP_KERNEL)
+/* CONFIG_USB_UHCI_HIGH_BANDWITH turns on Full Speed Bandwidth
+ * Reclamation: feature that puts loop on descriptor loop when
+ * there's some transfer going on. With FSBR, USB performance
+ * is optimal, but PCI is slowed down up-to 5 times, slowing down
+ * system performance.
+ */
#define CONFIG_USB_UHCI_HIGH_BANDWIDTH
+/* *_DEPTH_FIRST puts descriptor in depth-first mode. This has
+ * somehow similar effect to FSBR (higher speed), but does not
+ * slow PCI down. OTOH USB performace is slightly slower than
+ * in FSBR case and single device could hog whole USB, starving
+ * other devices.
+ */
#define USE_CTRL_DEPTH_FIRST 0 // 0: Breadth first, 1: Depth first
#define USE_BULK_DEPTH_FIRST 0 // 0: Breadth first, 1: Depth first
+/* Turning off both CONFIG_USB_UHCI_HIGH_BANDWITH and *_DEPTH_FIRST
+ * will lead to 64KB/sec performance over USB, max. You probably
+ * do not want to do that.
+ */
// stop bandwidth reclamation after (roughly) 50ms
#define IDLE_TIMEOUT (HZ/20)
--
I'm [EMAIL PROTECTED] "In my country we have almost anarchy and I don't care."
Panos Katsaloulis describing me w.r.t. patents at [EMAIL PROTECTED]
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