On Mon, Sep 17, 2012 at 01:51:39PM -0700, Kent Overstreet wrote: > That isn't a very good patch - it says it's clearing bi_end_io as a > precaution, but as a precaution to what? As a precaution against the endio function being called an extra time by mistake if a stray reference remains after the bio has been freed. Wipe this field when dm frees it. Defensive programming, basically, in response to a tricky bug he had to deal with.
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