| Subject | Re: [patch 24/52] fs: dcache reduce d_parent locking | From | Peter Zijlstra <> | Date | Thu, 24 Jun 2010 10:44:22 +0200 |
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On Thu, 2010-06-24 at 13:02 +1000, npiggin@suse.de wrote: > Use RCU property of dcache to simplify locking in some places where we > take d_parent and d_lock. > > Comment: don't need rcu_deref because we take the spinlock and recheck it.
But does the LOCK barrier imply a DATA DEPENDENCY barrier? (It does on x86, and the compiler barrier implied by spin_lock() suffices to replace ACCESS_ONCE()).
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