Re: [PATCH 0/3] Add gup fast + longterm and use it in HFI1

[Jason Gunthorpe]

On Mon, Feb 11, 2019 at 12:34:17PM -0800, Davidlohr Bueso wrote:
> On Mon, 11 Feb 2019, ira.weiny@xxxxxxxxx wrote:
> > Ira Weiny (3):
> >  mm/gup: Change "write" parameter to flags
> >  mm/gup: Introduce get_user_pages_fast_longterm()
> >  IB/HFI1: Use new get_user_pages_fast_longterm()
> 
> Out of curiosity, are you planning on having all rdma drivers
> use get_user_pages_fast_longterm()? Ie:
> 
> hw/mthca/mthca_memfree.c:       ret = get_user_pages_fast(uaddr & PAGE_MASK, 1, FOLL_WRITE, pages);

This one is certainly a mistake - this should be done with a umem.

Jason