On Wed, 2019-03-20 at 11:31 -0700, Yang Shi wrote:
No, this is not correct. queue_pages_pmd() may return 0, which means THP gets split. If it returns 0 the code should just fall through instead of returning.
Right, I overlooked that.
It sounds not correct to me. We need check if there is existing page on the node which is not allowed by the policy. This is what queue_pages_required() does.
Bleh, I guess it was too early in the morning. That is the whole point of it actually, so that was quite wrong.
Sorry for trying to mislead you ;-)
Reviewed-by: Oscar Salvador osalvador@suse.de