> Ignoring the free page allocator which abuses pg->offset, is there any > reason we cannot fold pg->flags into pg->offset? The lower PAGE_SHIFT bits > of pg->offset are not used.
is this about making vm_page smaller? if so, and it works, i guess that seems fine, but how many bits do you want to use? ie, what is the smallest PAGE_SIZE we will support? if not that, why? .mrg.