On 11.07.23 06:48, Aneesh Kumar K.V wrote:
From: Vishal Verma <vishal.l.verma@xxxxxxxxx> With DAX memory regions originating from CXL memory expanders or NVDIMMs, the kmem driver may be hot-adding huge amounts of system memory on a system without enough 'regular' main memory to support the memmap for it. To avoid this, ensure that all kmem managed hotplugged memory is added with the MHP_MEMMAP_ON_MEMORY flag to place the memmap on the new memory region being hot added. To do this, call add_memory() in chunks of memory_block_size_bytes() as that is a requirement for memmap_on_memory. Cc: "Rafael J. Wysocki" <rafael@xxxxxxxxxx> Cc: Len Brown <lenb@xxxxxxxxxx> Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Cc: David Hildenbrand <david@xxxxxxxxxx> Cc: Oscar Salvador <osalvador@xxxxxxx> Cc: Dan Williams <dan.j.williams@xxxxxxxxx> Cc: Dave Jiang <dave.jiang@xxxxxxxxx> Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx> Cc: Huang Ying <ying.huang@xxxxxxxxx> Signed-off-by: Vishal Verma <vishal.l.verma@xxxxxxxxx> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxx> ---
See my feedback as reply to the original patch. -- Cheers, David / dhildenb
