-------- Original Message --------
Subject: Re: [linux-usb-devel] Lacie USB2.0 Hard disk bug report
Date: Thu, 16 Jan 2003 11:13:52 +1300
From: Stephen Harker <[EMAIL PROTECTED]>
To: Alan Stern <[EMAIL PROTECTED]>
References: <[EMAIL PROTECTED]>
Alan Stern wrote:
> On the face of it, this looks like it might be a problem in ext3 or the
> memory management code.
<snip>
>>Trace; c013f258 <try_to_free_buffers+88/f0>
>>Trace; c0133a67 <shrink_cache+217/300>
>>Trace; c0133c95 <shrink_caches+55/90>
>>Trace; c0133d03 <try_to_free_pages_zone+33/60>
>>Trace; c0134c10 <balance_classzone+60/200>
>>Trace; c0134e89 <__alloc_pages+d9/170>
>>Trace; c012fcde <generic_file_write+32e/6d0>
>>Trace; d080ec81 <[jbd].text.lock.journal+5ea5/14284>
>>Trace; c013b314 <sys_write+84/100>
>>Trace; c0108f03 <system_call+33/40>
>
>
> If you suspect the problem really lies in usb-storage, you could try
> enabling the debug option for usb-storage and recompiling it. Then see
> what your kernel log has to say.
Well, the USB HD is FAT32 rather than ext3 so I don't know if that
matters. Does the above trace suggest that the oops was caused by
writing TO the IDE ext3 HD rather than reading FROM the MSDOS USB2.0 HD?
I don't understand the intricacies, but if it all works fine at USB1.1
speeds (and it does work flawlessly) but barfs when plugged in to a USB
2.0 port does that not imply a problem with the ehci-hcd module rather
than usb-storage or ext3/MSDOS? Does the ehci-hcd module present a
subtly different view of the world to the usb-storage and fs modules
than just the usb-uhci modules by itself? Excuse my ignorance :-)
I understand that the ehci works WITH the uhci module at USB2.0 speeds
rather than instead of it.
Anyway, I can re-do it with usb-storage debugging on and see what that
turns up...
Thanks for your help. I would like to get this working so whatever I can
do to help it along... I'm sure I'm not the only one with one of these
drives.
Steve
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