Re: commit 554f76962d3a6eb5110415f1591aca83f96a84ae hangs USB for vmware 7.0.1

From: Oliver Neukum
Date: Sat Mar 06 2010 - 04:04:43 EST

Am Samstag, 6. März 2010 06:22:48 schrieb Jeff Chua:
> It seems to hang trying to read from /proc/bus/usb/devices.
> So, next I just try to "cat /proc/bus/usb/devices" and it hangs as well.
> Reverting the commit makes "cat /proc/bus/usb/devices" works again.
> Does this happen to me only?

As far as I can tell, yes. I cannot replicate it.

Please get me at least a sysrq-T trace.
There's no obvious place usb_device_read() takes usbfs_mutex.

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