[$] Thoughts on the ext4 panic

In just a few days, a linux-kernel mailing list report of ext4 filesystem
corruption turned into a widely-distributed news story; the quality of ext4
and its maintenance, it seemed, was in doubt. Once the dust settled, the
situation turned out to be rather less grave than some had thought; the bug
in question only threatened a very small group of ext4 users using
non-default mount options. As this is being written, a fix is in testing
and should be making its way toward the mainline and stable kernels
shortly. The bug was
obscure, but there is value in looking at how it came about and the ripples
it caused.