Do you know if the kernel was low on memory at the time? (any
signs of allocation failures in your system log?)
This looks like a memory allocation failure which hasn't been
gracefully handled (or approriately retried) in XFS - there's
a few patches being worked on to improve this, but they aren't
ready to be merged in just yet.
Well, now that you mention it, there's another trace right in front of
the oops. Don't know why I missed it - probably thought it was the same
thing. It says allocation failure. I am running FC2 with 128MB SDRAM.
(Trace in previous message in thread)
I think this is caused by working with a 385 MB LKML archive file when
low on memory (basically all the time..) I can't ls -l that particular
folder after t-bird locks up, since ls locks up too and becomes unkillable.