RE: [PATCH 23/26] ib: Convert qib_get_user_pages() toget_user_pages_unlocked()

[Marciniszyn, Mike]

> -----Original Message-----
> From: Jan Kara [mailto:jack@xxxxxxx]
> Sent: Wednesday, October 02, 2013 11:39 AM
> To: Marciniszyn, Mike
> Cc: Jan Kara; LKML; linux-mm@xxxxxxxxx; infinipath; Roland Dreier; linux-
> rdma@xxxxxxxxxxxxxxx
> Subject: Re: [PATCH 23/26] ib: Convert qib_get_user_pages() to
> get_user_pages_unlocked()
> 
> On Wed 02-10-13 15:32:47, Marciniszyn, Mike wrote:
> > > > The risk of GUP fast is the loss of the "force" arg on GUP fast,
> > > > which I don't see as significant give our use case.
> > >   Yes. I was discussing with Roland some time ago whether the force
> > > argument is needed and he said it is. So I kept the arguments of
> > > get_user_pages() intact and just simplified the locking...
> >
> > The PSM side of the code is a more traditional use of GUP (like direct
> > I/O), so I think it is a different use case than the locking for IB
> > memory regions.
>   Ah, I see. Whatever suits you best. I don't really care as long as
> get_user_pages() locking doesn't leak into IB drivers :)
> 
> 								Honza
> --
> Jan Kara <jack@xxxxxxx>
> SUSE Labs, CR
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