Zi Yan <ziy@xxxxxxxxxx> writes:
> On 31 Mar 2020, at 4:56, Huang, Ying wrote:
>>
>> From: Huang Ying <ying.huang@xxxxxxxxx>
>> - /* FOLL_DUMP will return -EFAULT on huge zero page */
>> - page = follow_trans_huge_pmd(vma, addr, pmd, FOLL_DUMP);
>> + if (pmd_present(*pmd)) {
>> + /* FOLL_DUMP will return -EFAULT on huge zero page */
>> + page = follow_trans_huge_pmd(vma, addr, pmd, FOLL_DUMP);
>> + } else if (unlikely(is_swap_pmd(*pmd))) {
>
> Should be:
> } else if (unlikely(thp_migration_support() && is_swap_pmd(*pmd))) {
Thought this again. This can reduce the code size if
thp_migration_support() isn't enabled. I will do this in the next
version.
Best Regards,
Huang, Ying
