Re: [PATCH] hugetlbfs: add O_TMPFILE support

[Mike Kravetz]

On 10/15/19 3:50 AM, Michal Hocko wrote:
> On Tue 15-10-19 11:01:12, Piotr Sarna wrote:
>> With hugetlbfs, a common pattern for mapping anonymous huge pages
>> is to create a temporary file first.
> 
> Really? I though that this is normally done by shmget(SHM_HUGETLB) or
> mmap(MAP_HUGETLB). Or maybe I misunderstood your definition on anonymous
> huge pages.
> 
>> Currently libraries like
>> libhugetlbfs and seastar create these with a standard mkstemp+unlink
>> trick,

I would guess that much of libhugetlbfs was writen before MAP_HUGETLB
was implemented.  So, that is why it does not make (more) use of that
option.

The implementation looks to be straight forward.  However, I really do
not want to add more functionality to hugetlbfs unless there is specific
use case that needs it.
-- 
Mike Kravetz