Haiyue Wang <haiyue.wang@xxxxxxxxx> writes:
> Not all huge page APIs support FOLL_GET option, so the __NR_move_pages
move_pages() is a syscall, so you can just call it move_pages(), or
move_pages() syscall.
> will fail to get the page node information for huge page.
~~~~~~~~~
some huge pages?
> This is an temporary solution to mitigate the racing fix.
Why is it "racing fix"? This isn't a race condition fix.
Best Regards,
Huang, Ying
> After supporting follow huge page by FOLL_GET is done, this fix can be
> reverted safely.
>
> Fixes: 4cd614841c06 ("mm: migration: fix possible do_pages_stat_array racing with memory offline")
> Signed-off-by: Haiyue Wang <haiyue.wang@xxxxxxxxx>
[snip]
