Changelog since v1
o Better comments and macros (vbabka)
o Fix pindex_to_order (vbabka)
The per-cpu page allocator (PCP) only handles order-0 pages. With the
series "Use local_lock for pcp protection and reduce stat overhead"
and "Calculate pcp->high based on zone sizes and active CPUs", it's now
feasible to store high-order pages on PCP lists.
This small series allows PCP to store "cheap" orders where cheap is
determined by PAGE_ALLOC_COSTLY_ORDER and THP-sized allocations. For
convenience, the series with the prerequisites are at
git://git.kernel.org/pub/scm/linux/kernel/git/mel/linux.git mm-pcphighorder-v2r1
The baseline is 5.13-rc2 because that is what I tested with but the
patches rebase cleanly to mmots.
include/linux/mmzone.h | 20 ++++-
mm/internal.h | 2 +-
mm/page_alloc.c | 171 +++++++++++++++++++++++++++++------------
mm/swap.c | 2 +-
4 files changed, 141 insertions(+), 54 deletions(-)
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2.26.2