This is an updated series that addresses some review feedback and an LKP warning. I did not preserve Michal Hocko's ack for the fix as it has changed. This series replaces the following patches in mmotm
mm-pcp-share-common-code-between-memory-hotplug-and-percpu-sysctl-handler.patch mm-meminit-recalculate-pcpu-batch-and-high-limits-after-init-completes.patch mm-pcpu-make-zone-pcp-updates-and-reset-internal-to-the-mm.patch Changelog since V1 o Fix a "might sleep" warning o Reorder for easier backporting A private report stated that system CPU usage was excessive on an AMD EPYC 2 machine while building kernels with much longer build times than expected. The issue is partially explained by high zone lock contention due to the per-cpu page allocator batch and high limits being calculated incorrectly. This series addresses a large chunk of the problem. Patch 1 is the real fix and the other two are cosmetic issues noticed while implementing the fix. include/linux/mm.h | 3 --- mm/internal.h | 3 +++ mm/page_alloc.c | 31 ++++++++++++++++++++----------- 3 files changed, 23 insertions(+), 14 deletions(-) -- 2.16.4
