tree 3957a8a7ca4c1196b4e6a875b303fcbaa3c827e1
parent 813932149e7847c91f544a03b943a84c5b264f76
author Peter Zijlstra <peterz@infradead.org> 1385376550 +0100
committer Ingo Molnar <mingo@kernel.org> 1386773602 +0100

perf: Optimize ring-buffer write by depending on control dependencies

Remove a full barrier from the ring-buffer write path by relying on
a control dependency to order a LOAD -> STORE scenario.

Cc: "Paul E. McKenney" <paulmck@us.ibm.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/n/tip-8alv40z6ikk57jzbaobnxrjl@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>