On Tue, May 27, 2014 at 10:14:10AM -0500, Christoph Lameter wrote: > On Tue, 27 May 2014, Peter Zijlstra wrote: > > > Well, like with IB, they start out as normal userspace pages, and will > > be from ZONE_MOVABLE. > > Well we could change that now I think. If the VMA has VM_PINNED set > pages then do not allocate from ZONE_MOVABLE. But most allocations sites don't have the vma. We allocate page-cache pages based on its address_space/mapping, not on whatever vma they're mapped into. So I still think the sanest way to do this is by making mm_mpin() do a mm_populate() and have reclaim skip VM_PINNED pages (so they stay present), and then migrate the lot out of MOVABLE. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>