Greg KH wrote:
> On Wed, May 22, 2002 at 04:28:22AM +0200, [EMAIL PROTECTED] wrote:
>
>>== Andries, what kind of USB problems did you have with 2.5.16?
>>
>>Yes, I must keep coming back until this is cleared up.
>>
>>2.5.14 works.
>>2.5.15 works.
>>2.5.16 hangs upon insmod usb-storage
>>2.5.16 with the usb/storage directory replaced by that from 2.5.15 works
>>
>>The patch from 2.5.15 to 2.5.16 is 130kB or so.
>>Split the patch in separate subpatches. After applying 90kB of those
>>things still work. Must look a bit better at the last part.
>>Unfortunately not before Friday.
>>Maybe the hang is because of the replacement of semaphores by spinlocks?
>>
>>[Can the author of that code (try to) check that the locking stuff is OK?]
>
Could you enable the debugging printk's of usb-storage change the printk
level to everything (echo 8 8 8 8 > /proc/sys/kernel/printk) and run
again into the deadlock?
What are the last messages?
I found one deadlock: command_abort() calls wait_for_completion(), but
it's possible that the current command finishes without calling
complete(), or that the current command completes between the test that
a command is running and the wait_for_completion().
--
Manfred
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