The pmem dev as received in devm_memremap_pages() does not have
its dev->numa_node properly initialized yet.
What I see is that all pmem devices will call arch_add_memory
with nid==0 regardless of the real nid the memory is actually
on. Needless to say that after that all the NUMA page and zone
members (at page->flags) come out wrong.
If I do the below code it will all work properly.
RFC because probably we want to fix dev->numa_node before the
call to devm_memremap_pages.
This is on top of v4.3. I will please need the final fix for Stable@
Thanks
Signed-off-by: Boaz Harrosh <boaz@xxxxxxxxxxxxx>
---
kernel/memremap.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/kernel/memremap.c b/kernel/memremap.c
index 9d6b555..9409e23 100644
--- a/kernel/memremap.c
+++ b/kernel/memremap.c
@@ -183,9 +183,7 @@ void *devm_memremap_pages(struct device *dev, struct resource *res)
memcpy(&page_map->res, res, sizeof(*res));
- nid = dev_to_node(dev);
- if (nid < 0)
- nid = 0;
+ nid = memory_add_physaddr_to_nid(res->start);
error = arch_add_memory(nid, res->start, resource_size(res), true);
if (error) {
--
1.9.3
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