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SubjectRe: REGRESSION: Performance regressions from switching anon_vma->lock to mutex
On Wed, 2011-06-15 at 13:52 +0200, Peter Zijlstra wrote:
> /me goes re-test without the sirq-rcu bits mixed in just to make sure.

I switched from PREEMPT=n to PREEMPT_VOLUNTARY=y, which seemed to make a

.39 257.651 messages/sec/core
-tip 254.976 messages/sec/core
+linus 258.03 messages/sec/core
+sirq 265.951 messages/sec/core

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