Some small buddy allocator/struct page patches The first two patches are small buddy allocator cleanups - they were supposed to be prep work patches to replacing buddy allocator freelists with radix trees, but I'm not sure if that's actually going to be feasible due to highmem - but the patches are still improvements so I wanted to send them out. The third, to mm/page_reporting, also came about because that code walks buddy allocator freelists but is a much more significant cleanup. I have no idea how to test page reporting though so it's only Correct By Obviousness, so hopefully Alexander can help us out with that. The last two patches are important for the struct page cleanups currently underway. We have a lot of code using page->index and page->mapping in ad-hoc ways, and this is a real problem given our goal of cutting struct page up into different types that each have a well defined purpose - and it turns out that a lot of that code is using those fields for very minor conveniences. We still need a lot more cleanups like this, I've only done two of the easier ones. Kent Overstreet (5): mm: Make free_area->nr_free per migratetype mm: Introduce struct page_free_list mm/page_reporting: Improve control flow md: Kill usage of page->index brd: Kill usage of page->index drivers/block/brd.c | 4 -- drivers/md/md-bitmap.c | 44 ++++++------ include/linux/mmzone.h | 22 ++++-- kernel/crash_core.c | 4 +- mm/compaction.c | 20 +++--- mm/page_alloc.c | 50 +++++++------ mm/page_reporting.c | 158 +++++++++++++++-------------------------- mm/vmstat.c | 28 +------- 8 files changed, 138 insertions(+), 192 deletions(-) -- 2.33.0
