Subject: USB driver panic (usbd_alloc_xfer() ...)
To: None <Davef1624@aol.com>
From: None <firstname.lastname@example.org>
Date: 05/11/2005 02:34:04
I'm seeing an occasional uvm_fault/trap when 'quickly'
USB cable from/to a SuperMicro Xeon motherboard.
The USB cable is a Prolific 2302 host-to-host bridge.
The panic is in usbd_alloc_xfer(), at the line:
xfer = dev->bus->methods->allocx(dev->bus);
It appears as though 'bus' in invalid (however 'methods' generates a
trap when dereferenced).
'bus' is a valid pointer but appears to point to an invalid usbd_bus
The UPL driver is used as the device driver for the Prolific 2302
It is actually in the backtrace (upl_init() -> upl_tx_list_init() ->
For some reason, 'quickly' pulling/re-inserting the USB cables is
causing the USB subsystem
to repeatedly detach/re-attach the UPL driver (& USB transport of
Can anybody help me with this issue?
From: Hubert Feyrer <email@example.com>
To: Eric Auge <firstname.lastname@example.org>
Cc: tech-net@NetBSD.org; tech-perform@NetBSD.org
Sent: Wed, 11 May 2005 03:38:45 +0200 (CEST)
Subject: Re: UDP(/TCP?) bench/tuning ?
On Tue, 10 May 2005, Eric Auge wrote:
> I have tryed to increase :
> Is there any other tuning params that I can tweak ?
Sorry for not having this documented in the proper place
(http://www.netbsd.org/guide/en/chap-tuning.html), but you may find the
following link useful: http://proj.sunet.se/LSR2/
-- Ihr, nicht ich! -> http://spreeblick.com/blog/index.php?p=841