[Bug 25832] kernel crashes upon resume if usb devices are removed when suspended

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https://bugzilla.kernel.org/show_bug.cgi?id=25832





--- Comment #17 from rocko <rockorequin@xxxxxxxxxxx>  2011-02-06 02:53:57 ---
The home directory is on an internal partition and thus never removed. The
system was pretty quiet before the suspend - all I had done after rebooting was
run Firefox to look at this bug report, and I didn't see any substantial disk
activity from any automated tasks like updatedb.

I tried a few cycles removing only the drives and not the hub but haven't
re-encountered the problem in 2.6.38-rc3 yet. This did reveal that I actually
have five external drives connected, not four. (There's an extra 1TB.) I'll try
later with 2.6.37 since it does seem to be easier to reproduce there.

On a few occasions the PC has frozen when I simply removed the USB cable during
normal operation (not during a resume). This happened once on the other 32 bit
PC as well. It is unfortunately much harder to reproduce. Could this indicate
perhaps that the paging request bug is a symptom of an earlier memory
corruption caused when the file system attempts to access a mounted but removed
partition before realising it has gone?

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