Bug 456065 - Kernel hangs during ohci-hcd stress testing
Kernel hangs during ohci-hcd stress testing
Status: CLOSED DUPLICATE of bug 455843
Product: Red Hat Enterprise Linux 4
Classification: Red Hat
Component: kernel (Show other bugs)
All Linux
low Severity low
: rc
: ---
Assigned To: Vitaly Mayatskikh
Martin Jenner
Depends On:
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Reported: 2008-07-21 06:57 EDT by Vitaly Mayatskikh
Modified: 2008-07-24 02:46 EDT (History)
1 user (show)

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Doc Type: Bug Fix
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Last Closed: 2008-07-24 02:46:17 EDT
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Description Vitaly Mayatskikh 2008-07-21 06:57:47 EDT
Insert any h/w into ohci usb port, run two scripts in parallel:

$ while true; do rmmod ohci; modprobe ohci; done

$ while true; do lsusb; done > /dev/null

It's better to run 2-3 lsusb loops simultaneously. lsusb script outputs:

cannot read device descriptor No such device (19)
cannot read device descriptor No such device (19)
cannot open /proc/bus/usb/002/001, No such file or directory (2)

And kernel silently hangs in several minutes. Verified on x86_64 and ppc64 machines.
Comment 2 Vitaly Mayatskikh 2008-07-24 02:46:17 EDT

*** This bug has been marked as a duplicate of 455843 ***

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