Large USB storage devices cause df to hang and cpu load reaches 100%

Hi all,

I would like to report a problem I have noticed since linux-2.6.22 that 
most likely has to do with the USB subsystem.

I have tried both kernel versions 2.6.22 and 2.6.22.1(configured with 
make oldconfig) and in both cases whenever I plug in a fairly 
large(500GB) MyBook usb2 hard disk df stops producing output and hangs 
for about a minute when it reaches the usb disk. Interestingly enough 
the disk's directory tree can be accessed immediately. It is only df and 
Thunar, the xfce window manager, that slow down. During this temporary 
hang the cpu load fluctuates and reaches 100% several times.

When I plugged in a small(512MB) usb2 memory stick, instead of the disk, 
df paused only momentarily before terminating normally. This suggests to 
me that the size of the device affects the duration of the delay.

The modules I use, apart from usb_storage, are ehci_hcd and uhci_hcd. 
With linux-2.6.21.5 both usb devices work fine.

I don't know how to proceed from here. Please let me know if you need 
additional information or if I need to contact someone else. Thank you.


Regards,
Kostas Peletidis

-------------------------------------------------------------------------
This SF.net email is sponsored by: Splunk Inc.
Still grepping through log files to find problems?  Stop.
Now Search log events and configuration files using AJAX and a browser.
Download your FREE copy of Splunk now >>  http://get.splunk.com/
_______________________________________________
[email protected]
To unsubscribe, use the last form field at:
https://lists.sourceforge.net/lists/listinfo/linux-usb-devel