Good, but I'd also won't want to get this without making sure the async
quiesce works well on large number of namespaces (the reason why this
is proposed in the first place). Not sure who is planning to do that...
That can be added when async quiesce is done.
Chao, are you looking into that? I'd really hate to find out we have an
issue there post conversion...
Now we config CONFIG_TREE_SRCU, the size of TREE_SRCU is too big. I
really appreciate the work of Ming.
I review the patch, I think the patch may work well now, but do extra
works for exception scenario. Percpu_ref is not disigned for
serialization which read low cost. If we replace SRCU with percpu_ref,
the benefit is save memory for blocking queue, the price is limit future
changes or do more extra works.
I do not think replace SRCU with percpu_ref is a good idea, because it's
hard to predict how much we'll lose.
Not sure I understand your point, can you clarify what is the poor
design of percpu_ref and for which use-case?
