Re: [PATCH 3/3] kref: Remove the memory barriers

[Peter Zijlstra]

On Mon, 2011-12-12 at 11:48 +0800, Ming Lei wrote:
> We can't assume any lock about kref usage, because kref is often used
> in lockless scenario. 

Then you're doing it wrong, seriously.

kref in lockless scenarios simply doesn't work, you need rcu (or another
means to stabilize storage) and atomic_inc_not_zero() as well as means
to validate your object after the lookup.


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