On 7/6/2022 5:02 PM, Christoph Hellwig wrote:
On Wed, Jul 06, 2022 at 04:57:33PM +0800, Tianyu Lan wrote:
Swiotlb_init() is called in the mem_init() of different architects and
memblock free pages are released to the buddy allocator just after
calling swiotlb_init() via memblock_free_all().
Yes.
The mem_init() is called before smp_init().
But why would that matter? cpu_possible_map is set up from
setup_arch(), which is called before that.
Sorry. I just still focus online cpu number and the number is got after
smp_init(). Possible cpu number includes some offline cpus. I will have
a try. Thanks for suggestion.
