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

[Rik van Riel]

On 12/01/2012 03:10 PM, 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>

Reviewed-by: Rik van Riel <riel@xxxxxxxxxx>


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