Re: linux 2.6.7, usb2 data corruption & lockups & poor performance

[Alan Stern]

On Mon, 5 Jul 2004, janne wrote:

> Updated kernel to 2.6.7, apparently bttv and pci overloading are not
> issues here: I got usb2 to crash with nothing else loading the pci bus
> except light network traffic. usb2 read speed improved from 5-15MBytes/s
> to over 20MBytes/s when i switched it to a kt600 motherboard.
> But still it's over 10MBytes/s less than the manufacturer's claimed
> sustained data rate.

Why do you say that you got usb2 to crash?  The log you posted clearly 
shows that the crash originated in the reiserfs code, caused by a series 
of I/O errors.

Your log doesn't give any indication why those I/O errors occurred; in 
fact it starts in the middle of the errors.  If you want to find out what 
really went wrong, you will have to turn on the usb-storage debugging 
option in your kernel's configuration.

Alan Stern

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