[linux-usb-devel] 2.6: USB Storage hangs machine on bootup for ~2 minutes

[linux-usb-devel] 2.6: USB Storage hangs machine on bootup for ~2 minutes

Post by Alan Ster » Thu, 24 Feb 2005 05:50:08



usb_device_read acquires a couple of locks, one for the USB bus list and
one for the root hub of the bus it's looking at. I don't know which one
occurs at offset 229 on your system -- maybe you can tell. Oddly enough,
neither of those locks is for a USB device like the Maxtor drive. So it's
not at all clear why plugging in the drive should mess up kudzu. Or why
the blockage should clear up after a couple of minutes.

Perhaps we can find out by looking at other entries in the stack trace.
Of particular interest are the khubd, usb-storage, and scsi_eh processes.

Alan Stern

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[linux-usb-devel] 2.6: USB Storage hangs machine on bootup for ~2 minutes

Post by Alan Ster » Fri, 25 Feb 2005 01:00:13

n Tue, 22 Feb 2005, Parag Warudkar wrote:


Well, this problem looks like something for which a patch was submitted
about a week ago. Try applying

http://marc.theaimsgroup.com/?l=linux-usb-devel&m=110859441830485&w=2

and see if it helps. This doesn't bring us any closer to understanding
the 2-minute delay, though.


I hope it doesn't become necessary to decode that!

Alan Stern


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