Messages in this thread | | | Date | Mon, 28 Apr 2008 13:34:11 -0700 (PDT) | From | Christoph Lameter <> | Subject | Re: [PATCH 01 of 12] Core of mmu notifiers |
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On Sun, 27 Apr 2008, Andrea Arcangeli wrote:
> Talking about post 2.6.26: the refcount with rcu in the anon-vma > conversion seems unnecessary and may explain part of the AIM slowdown > too. The rest looks ok and probably we should switch the code to a > compile-time decision between rwlock and rwsem (so obsoleting the > current spinlock).
You are going to take a semphore in an rcu section? Guess you did not activate all debugging options while testing? I was not aware that you can take a sleeping lock from a non preemptible context.
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