Messages in this thread | | | From | Linus Torvalds <> | Date | Fri, 17 Jun 2011 09:46:00 -0700 | Subject | Re: REGRESSION: Performance regressions from switching anon_vma->lock to mutex |
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On Fri, Jun 17, 2011 at 4:28 AM, Peter Zijlstra <a.p.zijlstra@chello.nl> wrote: > > Something like so? Compiles and runs the benchmark in question.
Oh, and can you do this with a commit log and sign-off, and I'll put it in my "anon_vma-locking" branch that I have. I'm not going to actually merge that branch into mainline until I've seen a few more acks or more testing by Tim.
But if Tim's numbers hold up (-32% to +15% performance by just the first one, and +15% isn't actually an improvement since tmpfs read-ahead should have gotten us to +66%), I think we have to do this just to avoid the performance regression.
Linus
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