[BProc] /dev/zero (deleted)

[Julian S. <ju...@va...>]

I'm running Valgrind on a BProc cluster.  Every now and again 
V looks at /proc/self/maps to make sure it hasn't lost track of
the process' address space layout.

Mostly this is fine.  However, mappings which started out referring
to "/dev/zero" seem to get renamed to "/dev/zero (deleted)", possibly
as a result of process migration (not sure).  Also, the mapping's
device and inode numbers change.

This isn't harmful, but I am curious to know what's going on.
It doesn't happen to anonymous mappings, which is a bit strange.

J