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Bug 456065 - Kernel hangs during ohci-hcd stress testing
Summary: Kernel hangs during ohci-hcd stress testing
Status: CLOSED DUPLICATE of bug 455843
Alias: None
Product: Red Hat Enterprise Linux 4
Classification: Red Hat
Component: kernel
Version: 4.8
Hardware: All
OS: Linux
Target Milestone: rc
: ---
Assignee: Vitaly Mayatskikh
QA Contact: Martin Jenner
Depends On:
TreeView+ depends on / blocked
Reported: 2008-07-21 10:57 UTC by Vitaly Mayatskikh
Modified: 2008-07-24 06:46 UTC (History)
1 user (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2008-07-24 06:46:17 UTC
Target Upstream Version:

Attachments (Terms of Use)

Description Vitaly Mayatskikh 2008-07-21 10:57:47 UTC
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 06:46:17 UTC

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

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