Messages in this thread | | | Date | Sat, 01 Dec 2012 13:55:50 -0500 | From | Rik van Riel <> | Subject | Re: [RFC PATCH] mm/migration: Remove anon vma locking from try_to_unmap() use |
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On 12/01/2012 01:38 PM, Linus Torvalds wrote: > On Sat, Dec 1, 2012 at 4:26 AM, Ingo Molnar <mingo@kernel.org> 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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