From: Jan Kara <jack-AlSwsSmVLrQ@public.gmane.org>
To: "Marciniszyn,
Mike" <mike.marciniszyn-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Cc: Jan Kara <jack-AlSwsSmVLrQ@public.gmane.org>,
LKML <linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org"
<linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org>,
infinipath <infinipath-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
Roland Dreier <roland-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
"linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: [PATCH 23/26] ib: Convert qib_get_user_pages() to get_user_pages_unlocked()
Date: Wed, 2 Oct 2013 17:38:42 +0200 [thread overview]
Message-ID: <20131002153842.GD32181@quack.suse.cz> (raw)
In-Reply-To: <32E1700B9017364D9B60AED9960492BC211AF005-AtyAts71sc9zLByeVOV5+bfspsVTdybXVpNB7YpNyf8@public.gmane.org>
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-AlSwsSmVLrQ@public.gmane.org>
SUSE Labs, CR
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next prev parent reply other threads:[~2013-10-02 15:38 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-02 14:27 [PATCH 0/26] get_user_pages() cleanup Jan Kara
2013-10-02 14:28 ` [PATCH 20/26] ib: Convert ib_umem_get() to get_user_pages_unlocked() Jan Kara
2013-10-02 14:28 ` [PATCH 21/26] ib: Convert ipath_get_user_pages() " Jan Kara
2013-10-02 14:28 ` [PATCH 22/26] ib: Convert ipath_user_sdma_pin_pages() to use get_user_pages_unlocked() Jan Kara
2013-10-02 14:28 ` [PATCH 23/26] ib: Convert qib_get_user_pages() to get_user_pages_unlocked() Jan Kara
[not found] ` <1380724087-13927-24-git-send-email-jack-AlSwsSmVLrQ@public.gmane.org>
2013-10-02 14:54 ` Marciniszyn, Mike
[not found] ` <32E1700B9017364D9B60AED9960492BC211AEF75-AtyAts71sc9zLByeVOV5+bfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2013-10-02 15:28 ` Jan Kara
[not found] ` <20131002152811.GC32181-+0h/O2h83AeN3ZZ/Hiejyg@public.gmane.org>
2013-10-02 15:32 ` Marciniszyn, Mike
[not found] ` <32E1700B9017364D9B60AED9960492BC211AF005-AtyAts71sc9zLByeVOV5+bfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2013-10-02 15:38 ` Jan Kara [this message]
[not found] ` <20131002153842.GD32181-+0h/O2h83AeN3ZZ/Hiejyg@public.gmane.org>
2013-10-04 13:39 ` Marciniszyn, Mike
[not found] ` <32E1700B9017364D9B60AED9960492BC211B0123-AtyAts71sc9zLByeVOV5+bfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2013-10-04 13:46 ` Marciniszyn, Mike
2013-10-04 13:44 ` Marciniszyn, Mike
2013-10-04 13:52 ` Marciniszyn, Mike
[not found] ` <32E1700B9017364D9B60AED9960492BC211B0176-AtyAts71sc9zLByeVOV5+bfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2013-10-04 18:33 ` Jan Kara
[not found] ` <20131004183315.GA19557-+0h/O2h83AeN3ZZ/Hiejyg@public.gmane.org>
2013-10-07 15:20 ` Marciniszyn, Mike
2013-10-07 15:38 ` Marciniszyn, Mike
2013-10-07 17:26 ` Jan Kara
2013-10-08 19:06 ` Jan Kara
[not found] ` <20131008190604.GB14223-+0h/O2h83AeN3ZZ/Hiejyg@public.gmane.org>
2013-10-16 21:39 ` Jan Kara
2013-10-02 14:28 ` [PATCH 24/26] ib: Convert qib_user_sdma_pin_pages() to use get_user_pages_unlocked() Jan Kara
2013-10-02 14:28 ` [PATCH 25/26] ib: Convert mthca_map_user_db() to use get_user_pages_fast() Jan Kara
2013-10-02 16:20 ` [PATCH 0/26] get_user_pages() cleanup Christoph Hellwig
2013-10-02 20:29 ` Jan Kara
2013-10-04 20:31 ` KOSAKI Motohiro
2013-10-04 20:42 ` KOSAKI Motohiro
2013-10-07 21:18 ` Jan Kara
2013-10-08 0:27 ` KOSAKI Motohiro
2013-10-08 6:06 ` Jan Kara
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