On 12/01/2012 01:38 PM, Linus Torvalds wrote:
On Sat, Dec 1, 2012 at 4:26 AM, Ingo Molnar <mingo@xxxxxxxxxx> wrote:
So as a quick concept hack I wrote the patch attached below.
(It's not signed off, see the patch description text for the
reason.)
Well, it confirms that anon_vma locking is a big problem, but as
outlined in my other email it's completely incorrect from an actual
behavior standpoint.
Btw, I think the anon_vma lock could be made a spinlock
The anon_vma lock used to be a spinlock, and was turned into a
mutex by Peter, as part of an effort to make more of the VM
preemptible.
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