On Fri, Apr 21, 2017 at 5:05 AM, Michal Hocko <mhocko@xxxxxxxxxx> wrote: > Hi, > The last version of this series has been posted here [1]. It has seen > some more testing (thanks to Reza Arbab and Igor Mammedov[2]), Jerome's > and Vlastimil's review resulted in few fixes mostly folded in their > respected patches. > There are 4 more patches (patch 6+ in this series). I have checked the > most prominent pfn walkers to skip over offline holes and now and I feel > more comfortable to have this merged. All the reported issues should be > fixed > > There is still a lot of work on top - namely this implementation doesn't > support reonlining to a different zone on the zones boundaries but I > will do that in a separate series because this one is getting quite > large already and it should work reasonably well now. > > Joonsoo had some worries about pfn_valid and suggested to change its > semantic to return false on offline holes but I would be rally worried > to change a established semantic used by a lot of code and so I have > introuduced pfn_to_online_page helper instead. If this is seen as a > controversial point I would rather drop pfn_to_online_page and related > patches as they are not stictly necessary because the code would be > similarly broken as now wrt. offline holes. > > This is a rebase on top of linux-next (next-20170418) and the full > series is in git://git.kernel.org/pub/scm/linux/kernel/git/mhocko/mm.git > try attempts/rewrite-mem_hotplug branch. > [..] > Any thoughts, complains, suggestions? > > As a bonus we will get a nice cleanup in the memory hotplug codebase. > arch/ia64/mm/init.c | 11 +- > arch/powerpc/mm/mem.c | 12 +- > arch/s390/mm/init.c | 32 +-- > arch/sh/mm/init.c | 10 +- > arch/x86/mm/init_32.c | 7 +- > arch/x86/mm/init_64.c | 11 +- > drivers/base/memory.c | 79 +++---- > drivers/base/node.c | 58 ++---- > include/linux/memory_hotplug.h | 40 +++- > include/linux/mmzone.h | 44 +++- > include/linux/node.h | 35 +++- > kernel/memremap.c | 6 +- > mm/compaction.c | 5 +- > mm/memory_hotplug.c | 455 ++++++++++++++--------------------------- > mm/page_alloc.c | 13 +- > mm/page_isolation.c | 26 ++- > mm/sparse.c | 48 ++++- > 17 files changed, 407 insertions(+), 485 deletions(-) > > Shortlog says: > Michal Hocko (13): > mm: remove return value from init_currently_empty_zone > mm, memory_hotplug: use node instead of zone in can_online_high_movable > mm: drop page_initialized check from get_nid_for_pfn > mm, memory_hotplug: get rid of is_zone_device_section > mm, memory_hotplug: split up register_one_node > mm, memory_hotplug: consider offline memblocks removable > mm: consider zone which is not fully populated to have holes > mm, compaction: skip over holes in __reset_isolation_suitable > mm: __first_valid_page skip over offline pages > mm, memory_hotplug: do not associate hotadded memory to zones until online > mm, memory_hotplug: replace for_device by want_memblock in arch_add_memory > mm, memory_hotplug: fix the section mismatch warning > mm, memory_hotplug: remove unused cruft after memory hotplug rework > > [1] http://lkml.kernel.org/r/20170410110351.12215-1-mhocko@xxxxxxxxxx > [2] http://lkml.kernel.org/r/20170410162749.7d7f31c1@xxxxxxxxxxxxxxxxxxx > > The latest "attempts/rewrite-mem_hotplug" branch passes my regression testing if I cherry-pick the following x86/mm fixes from mainline: e6ab9c4d4377 x86/mm/64: Fix crash in remove_pagetable() 71389703839e mm, zone_device: Replace {get, put}_zone_device_page() with a single reference to fix pmem crash You can add: Tested-by: Dan Williams <dan.j.williams@xxxxxxxxx> -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>
