On 11/13/2012 06:12 AM, Mel Gorman wrote:
From: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> Add another layer of fallback policy to make the home node concept useful from a memory allocation PoV. This changes the mpol order to: - vma->vm_ops->get_policy [if applicable] - vma->vm_policy [if applicable] - task->mempolicy - tsk_home_node() preferred [NEW] - default_policy
Why is the home node policy not the default policy?
Note that the tsk_home_node() policy has Migrate-on-Fault enabled to facilitate efficient on-demand memory migration. Signed-off-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> Cc: Paul Turner <pjt@xxxxxxxxxx> Cc: Lee Schermerhorn <Lee.Schermerhorn@xxxxxx> Cc: Christoph Lameter <cl@xxxxxxxxx> Cc: Rik van Riel <riel@xxxxxxxxxx> Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx> Signed-off-by: Mel Gorman <mgorman@xxxxxxx>
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