This patch set is meant to be a v3 to my earlier patch set "Address issues slowing memory init"[1]. However I have added 2 additional patches to address issues seen in which NVDIMM memory was slow to initialize especially on systems with multiple NUMA nodes. Since v2 of the patch set I have replaced the config option to work around the page init poisoning with a kernel parameter. I also updated one comment based on input from Michal. The third patch in this set is new and is meant to address the need to defer some page initialization to outside of the hot-plug lock. It is loosely based on the original patch set by Dan Williams to perform asynchronous page init for ZONE_DEVICE pages[2]. However, it is based more around the deferred page init model where memory init is deferred to a fixed point, which in this case is to just outside of the hot-plug lock. The fourth patch allows nvdimm init to be more node specific where possible. I basically just copy/pasted the approach used in pci_call_probe to allow for us to get the initialization code on the node as close to the memory as possible. Doing so allows us to save considerably on init time. [1]: https://lkml.org/lkml/2018/9/5/924 [2]: https://lkml.org/lkml/2018/7/16/828 --- Alexander Duyck (4): mm: Provide kernel parameter to allow disabling page init poisoning mm: Create non-atomic version of SetPageReserved for init use mm: Defer ZONE_DEVICE page initialization to the point where we init pgmap nvdimm: Trigger the device probe on a cpu local to the device Documentation/admin-guide/kernel-parameters.txt | 8 ++ drivers/nvdimm/bus.c | 45 ++++++++++ include/linux/mm.h | 2 include/linux/page-flags.h | 9 ++ kernel/memremap.c | 24 ++--- mm/debug.c | 16 +++ mm/hmm.c | 12 ++- mm/memblock.c | 5 - mm/page_alloc.c | 106 ++++++++++++++++++++++- mm/sparse.c | 4 - 10 files changed, 200 insertions(+), 31 deletions(-) --
