https://bugzilla.kernel.org/show_bug.cgi?id=215095 --- Comment #5 from Alan Stern (stern@xxxxxxxxxxxxxxxxxxx) --- Here's something you can do to help diagnose the soft lockup. When the lockup occurs, go to the /sys/kernel/debug/usb/ehci/* directory (fill in the "*" with the pathname for the EHCI controller that's locking up), make copies of the files you find there, and attach those copies to this bug report. Another thing you can do: Before the problem occurs, start a process doing cat /sys/kernel/debug/usb/usbmon/1u >mon.out and after the lockup happens, kill the "cat" process. Then attach the mon.out file to the bug report. There may be additional debugging options available in kvm, but I don't know what they are. -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.
