[RFC PATCH v4 15/40] mm: Add aggressive bias to prefer lower regions during page allocation

While allocating pages from buddy freelists, there could be situations in which we have a ready freepage of the required order in a *higher* numbered memory region, and there also exists a freepage of a higher page order in a *lower* numbered memory region. To make the consolidation logic more

[RFC PATCH v4 15/40] mm: Add aggressive bias to prefer lower regions during page allocation

While allocating pages from buddy freelists, there could be situations in which we have a ready freepage of the required order in a *higher* numbered memory region, and there also exists a freepage of a higher page order in a *lower* numbered memory region. To make the consolidation logic more