lkml.org 
[lkml]   [2013]   [Oct]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRE: [PATCH 23/26] ib: Convert qib_get_user_pages() to get_user_pages_unlocked()
Date


> -----Original Message-----
> From: Jan Kara [mailto:jack@suse.cz]
> Sent: Wednesday, October 02, 2013 11:39 AM
> To: Marciniszyn, Mike
> Cc: Jan Kara; LKML; linux-mm@kvack.org; infinipath; Roland Dreier; linux-
> rdma@vger.kernel.org
> 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@suse.cz>
> SUSE Labs, CR


\
 
 \ /
  Last update: 2013-10-04 16:01    [W:0.047 / U:3.632 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site