Messages in this thread | | | Subject | Re: [RFC][PATCH 10/26] mm, mpol: Make mempolicy home-node aware | From | Peter Zijlstra <> | Date | Mon, 19 Mar 2012 15:05:59 +0100 |
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On Mon, 2012-03-19 at 08:53 -0500, Christoph Lameter wrote: > On Fri, 16 Mar 2012, Peter Zijlstra wrote: > > > > > Note that the tsk_home_node() policy has Migrate-on-Fault enabled to > > > > facilitate efficient on-demand memory migration. > > > > > > The numa hierachy is already complex. Could we avoid adding another layer > > > by adding a MPOL_HOME_NODE and make that the default? > > > > Not sure that's really a win, the behaviour would be the same we just > > have to implement another policy, which is likely more code. > > A HOME_NODE policy would also help to ensure that existing applications > continue to work as expected. Given that people in the HPC industry and > elsewhere have been fine tuning around the scheduler for years this is a > desirable goal and ensures backward compatibility.
I really have no idea what you're saying. Existing applications that use mbind/set_mempolicy already continue to function exactly like before, see how the new layer is below all that.
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