Nick Piggin <npiggin@xxxxxxxxx> wrote:
> You still have to notice that it is .d_automount in rcu-walk mode, and bail
> out if it is. I can't see where you do that.
follow_managed(), and thus follow_automount() and ->d_automount(), are never
reached in rcu_walk mode, from what I can tell of the code.
There are two places follow_managed() is called:
(1) do_lookup() - where follow_managed() is only called in the else-part of
an if-statement contingent on a check of LOOKUP_RCU.
(2) do_last() - where follow_managed() is subsequent to a mutex having been
taken, so rcu-walk mode must have been exited prior to this as the
process may have needed to sleep.
At least, I'm assuming you may not sleep whilst in rcu-walk mode.
David
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