This patch set is meant to be a v4 to my earlier patch set "Address issues slowing memory init"[1], and a follow-up to my earlier patch set "Address issues slowing persistent memory initialization"[2]. Excluding any gains seen from using the vm_debug option to disable page init poisoning I see a total reduction in file-system init time of about two and a half minutes, or 65%, for a system initializing btrfs on a 12TB block of persistent memory split evenly over 4 NUMA nodes. Since the last patch set I have reworked the first patch to provide a more generic disable implementation that can be extended in the future. I tweaked the commit message for the second patch slightly to reflect why we might want to use a non-atomic __set_bit versus the atomic set_bit. I have modified the third patch to make it so that it can merge onto either the linux git tree or the linux-next git tree. The patch set that Dan Williams has outstanding may end up conflicting with this patch depending on the merge order. If his are merged first I believe the code I changed in mm/hmm.c could be dropped entirely. The fourth patch has been split into two and focused more on the async scheduling portion of the nvdimm code. The result is much cleaner than the original approach in that instead of having two threads running we are now getting the thread running where we wanted it to be. The last change for all patches is that I have updated my email address to alexander.h.duyck@xxxxxxxxxxxxxxx to reflect the fact that I have changed teams within Intel. I will be trying to use that for correspondence going forward instead of my gmail account. [1]: https://lkml.org/lkml/2018/9/5/924 [2]: https://lkml.org/lkml/2018/9/11/10 [3]: https://lkml.org/lkml/2018/9/13/104 --- Alexander Duyck (5): 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 async: Add support for queueing on specific node nvdimm: Schedule device registration on node local to the device Documentation/admin-guide/kernel-parameters.txt | 12 +++ drivers/nvdimm/bus.c | 19 ++++ include/linux/async.h | 20 ++++- include/linux/mm.h | 2 include/linux/page-flags.h | 9 ++ kernel/async.c | 36 ++++++-- kernel/memremap.c | 24 ++--- mm/debug.c | 46 ++++++++++ mm/hmm.c | 12 ++- mm/memblock.c | 5 - mm/page_alloc.c | 101 ++++++++++++++++++++++- mm/sparse.c | 4 - 12 files changed, 243 insertions(+), 47 deletions(-) --
