> On Jul 31, 2019, at 9:16 AM, Oleg Nesterov <o...@redhat.com> wrote:
>
> On 07/28, Song Liu wrote:
>>
>> @@ -525,6 +527,9 @@ int uprobe_write_opcode(struct arch_uprobe *auprobe,
>> struct mm_struct *mm,
>>
>> /* dec_mm_counter for old_page */
>> dec_mm_counter(mm, MM_ANONPAGES);
>> +
>> + if (PageCompound(orig_page))
>> + orig_page_huge = true;
>
> I am wondering how find_get_page() can return a PageCompound() page...
>
> IIUC, this is only possible if shmem_file(), right?
Yes, this is the case at the moment. We will be able to do it for other
file systems when this set gets in:
https://lkml.org/lkml/2019/6/24/1531
Thanks,
Song
