Re: [PATCH 1/2] mm/rmap: Convert the struct anon_vma::mutex to anrwsem

[Mel Gorman]

On Sat, Dec 01, 2012 at 09:10:30PM +0100, Ingo Molnar wrote:
> 
> Convert the struct anon_vma::mutex to an rwsem, which will help
> in solving a page-migration scalability problem. (Addressed in
> a separate patch.)
> 
> The conversion is simple and straightforward: in every case
> where we mutex_lock()ed we'll now down_write().
> 
> Suggested-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
> Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
> Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
> Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx>
> Cc: Rik van Riel <riel@xxxxxxxxxx>
> Cc: Mel Gorman <mgorman@xxxxxxx>
> Cc: Hugh Dickins <hughd@xxxxxxxxxx>
> Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>

Confirmation from the RT people that they're ok with this would be nice
but otherwise

Acked-by: Mel Gorman <mgorman@xxxxxxx>

-- 
Mel Gorman
SUSE Labs
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