Re: [PATCH] fix page_count in ->iomap_migrate_page()

[Gao Xiang <hsiangkao@xxxxxxx>]

Hi Richard,

On 2018/12/14 21:35, Richard Weinberger wrote:
> Hmm, in case of UBIFS it seems easy. We can add a get/put_page() around setting/clearing
> the flag.
> I did that now and so far none of my tests exploded.

Yes, many existed codes are based on this restriction in order to be freeable race-free.
and that's it since PG_Private was once introduced at first by Andrew Morton in 2002
for many Linux versions....and it's not bad I think... :)

Thanks,
Gao Xiang