Re: [PATCH v2] ovl: provide real_file() and overlayfs get_unmapped_area()

[Mike Kravetz]

On 6/10/20 7:17 PM, Al Viro wrote:
> On Wed, Jun 10, 2020 at 06:36:16PM -0700, Matthew Wilcox wrote:
> 
>> 	while (file->f_mode & FMODE_OVL_UPPER)
>> 		file = file->private_data;
>> 	return file;
>>
>> Or are you proposing that overlayfs copy FMODE_HUGEPAGES from the
>> underlying fs to the overlaying fs?
> 
> The latter - that way nobody outside of overlayfs needs to know what
> its ->private_data points to, for one thing.  And it's cheaper that
> way, obviously.
> 

Thanks Al and Matthew!

I knew adding a file op for this was overkill and was looking for other
suggestions.
-- 
Mike Kravetz