From: Christoph Hellwig <hch@infradead.org>
To: ira.weiny@intel.com
Cc: linux-fbdev@vger.kernel.org, Michal Hocko <mhocko@suse.com>,
kvm@vger.kernel.org, linux-sh@vger.kernel.org,
Peter Zijlstra <peterz@infradead.org>,
James Hogan <jhogan@kernel.org>,
linux-fpga@vger.kernel.org,
Heiko Carstens <heiko.carstens@de.ibm.com>,
dri-devel@lists.freedesktop.org, linux-mips@vger.kernel.org,
linux-mm@kvack.org, Rich Felker <dalias@libc.org>,
Paul Mackerras <paulus@samba.org>,
sparclinux@vger.kernel.org, ceph-devel@vger.kernel.org,
devel@driverdev.osuosl.org, linux-s390@vger.kernel.org,
rds-devel@oss.oracle.com,
Yoshinori Sato <ysato@users.sourceforge.jp>,
linux-rdma@vger.kernel.org, Jason Gunthorpe <jgg@ziepe.ca>,
Ingo Molnar <mingo@redhat.com>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
xen-devel@lists.xenproject.org, devel@lists.orangefs.org,
linux-media@vger.kernel.org, John Hubbard <jhubbard@nvidia.com>,
kvm-ppc@vger.kernel.org, Borisla
Subject: Re: [RESEND PATCH 0/7] Add FOLL_LONGTERM to GUP fast and use it
Date: Wed, 20 Feb 2019 07:19:30 -0800 [thread overview]
Message-ID: <20190220151930.GB11695__25895.2301157237$1550676200$gmane$org@infradead.org> (raw)
In-Reply-To: <20190220053040.10831-1-ira.weiny@intel.com>
On Tue, Feb 19, 2019 at 09:30:33PM -0800, ira.weiny@intel.com wrote:
> From: Ira Weiny <ira.weiny@intel.com>
>
> Resending these as I had only 1 minor comment which I believe we have covered
> in this series. I was anticipating these going through the mm tree as they
> depend on a cleanup patch there and the IB changes are very minor. But they
> could just as well go through the IB tree.
>
> NOTE: This series depends on my clean up patch to remove the write parameter
> from gup_fast_permitted()[1]
>
> HFI1, qib, and mthca, use get_user_pages_fast() due to it performance
> advantages. These pages can be held for a significant time. But
> get_user_pages_fast() does not protect against mapping of FS DAX pages.
This I don't get - if you do lock down long term mappings performance
of the actual get_user_pages call shouldn't matter to start with.
What do I miss?
next prev parent reply other threads:[~2019-02-20 15:19 UTC|newest]
Thread overview: 188+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-20 5:30 [RESEND PATCH 0/7] Add FOLL_LONGTERM to GUP fast and use it ira.weiny
2019-02-20 5:30 ` ira.weiny
2019-02-20 5:30 ` ira.weiny
2019-02-20 5:30 ` ira.weiny
2019-02-20 5:30 ` [RESEND PATCH 1/7] mm/gup: Replace get_user_pages_longterm() with FOLL_LONGTERM ira.weiny
2019-02-20 5:30 ` ira.weiny
2019-02-20 5:30 ` ira.weiny
2019-02-20 5:30 ` ira.weiny
2019-02-20 5:30 ` ira.weiny
2019-02-20 5:30 ` [RESEND PATCH 2/7] mm/gup: Change write parameter to flags in fast walk ira.weiny
2019-02-20 5:30 ` ira.weiny
2019-02-20 5:30 ` ira.weiny
2019-02-20 5:30 ` ira.weiny
2019-02-20 5:30 ` ira.weiny
2019-02-20 5:30 ` [RESEND PATCH 3/7] mm/gup: Change GUP fast to use flags rather than a write 'bool' ira.weiny
2019-02-20 5:30 ` ira.weiny
2019-02-20 5:30 ` ira.weiny
2019-02-20 5:30 ` ira.weiny
2019-02-20 5:30 ` ira.weiny
2019-02-20 19:29 ` Mike Marshall
2019-02-20 19:29 ` Mike Marshall
2019-02-20 19:29 ` Mike Marshall
2019-02-20 19:29 ` Mike Marshall
2019-02-20 19:29 ` Mike Marshall
2019-02-20 19:29 ` Mike Marshall
2019-02-21 3:18 ` Souptick Joarder
2019-02-21 3:18 ` Souptick Joarder
2019-02-21 3:30 ` Souptick Joarder
2019-02-21 3:18 ` Souptick Joarder
2019-02-21 3:18 ` Souptick Joarder
2019-02-21 3:18 ` Souptick Joarder
2019-02-21 22:24 ` Ira Weiny
2019-02-21 22:24 ` Ira Weiny
2019-02-21 22:24 ` Ira Weiny
2019-02-21 22:24 ` Ira Weiny
2019-02-21 22:24 ` Ira Weiny
2019-02-20 5:30 ` [RESEND PATCH 4/7] mm/gup: Add FOLL_LONGTERM capability to GUP fast ira.weiny
2019-02-20 5:30 ` ira.weiny
2019-02-20 5:30 ` ira.weiny
2019-02-20 5:30 ` ira.weiny
2019-02-20 5:30 ` ira.weiny
2019-02-20 5:30 ` [RESEND PATCH 5/7] IB/hfi1: Use the new FOLL_LONGTERM flag to get_user_pages_fast() ira.weiny
2019-02-20 5:30 ` ira.weiny
2019-02-20 5:30 ` ira.weiny
2019-02-20 5:30 ` ira.weiny
2019-02-20 5:30 ` [RESEND PATCH 6/7] IB/qib: " ira.weiny
2019-02-20 5:30 ` ira.weiny
2019-02-20 5:30 ` ira.weiny
2019-02-20 5:30 ` ira.weiny
2019-02-20 5:30 ` ira.weiny
2019-02-20 5:30 ` [RESEND PATCH 7/7] IB/mthca: " ira.weiny
2019-02-20 5:30 ` ira.weiny
2019-02-20 5:30 ` ira.weiny
2019-02-20 5:30 ` ira.weiny
2019-02-20 5:30 ` ira.weiny
2019-02-20 15:19 ` [RESEND PATCH 0/7] Add FOLL_LONGTERM to GUP fast and use it Christoph Hellwig
2019-02-20 15:19 ` Christoph Hellwig
2019-02-20 15:19 ` Christoph Hellwig
2019-02-20 15:19 ` Christoph Hellwig
2019-02-20 18:02 ` Ira Weiny
2019-02-20 18:02 ` Ira Weiny
2019-02-20 18:02 ` Ira Weiny
2019-02-20 18:02 ` Ira Weiny
2019-02-20 18:02 ` Ira Weiny
2019-02-20 15:19 ` Christoph Hellwig [this message]
2019-02-20 15:19 ` Christoph Hellwig
2019-02-27 19:14 ` Ira Weiny
2019-02-27 19:14 ` Ira Weiny
2019-02-27 19:14 ` Ira Weiny
2019-02-27 19:14 ` Ira Weiny
2019-02-27 19:14 ` Ira Weiny
2019-03-17 18:34 ` ira.weiny
2019-03-17 18:34 ` ira.weiny
2019-03-17 18:34 ` ira.weiny
2019-03-17 18:34 ` [RESEND 1/7] mm/gup: Replace get_user_pages_longterm() with FOLL_LONGTERM ira.weiny
2019-03-17 18:34 ` ira.weiny
2019-03-17 18:34 ` ira.weiny
2019-03-22 21:24 ` Dan Williams
2019-03-22 21:24 ` Dan Williams
2019-03-22 21:24 ` Dan Williams
2019-03-22 21:24 ` Dan Williams
2019-03-22 21:24 ` Dan Williams
2019-03-25 6:19 ` Ira Weiny
2019-03-25 6:19 ` Ira Weiny
2019-03-25 6:19 ` Ira Weiny
2019-03-25 6:19 ` Ira Weiny
2019-03-25 16:45 ` Dan Williams
2019-03-25 16:45 ` Dan Williams
2019-03-25 16:45 ` Dan Williams
2019-03-25 16:45 ` Dan Williams
2019-03-25 16:45 ` Dan Williams
2019-03-25 8:46 ` Ira Weiny
2019-03-25 8:46 ` Ira Weiny
2019-03-25 8:46 ` Ira Weiny
2019-03-25 8:46 ` Ira Weiny
2019-03-25 10:27 ` Ira Weiny
2019-03-25 10:27 ` Ira Weiny
2019-03-25 10:27 ` Ira Weiny
2019-03-25 10:27 ` Ira Weiny
2019-03-17 18:34 ` [RESEND 2/7] mm/gup: Change write parameter to flags in fast walk ira.weiny
2019-03-17 18:34 ` ira.weiny
2019-03-17 18:34 ` ira.weiny
2019-03-22 21:30 ` Dan Williams
2019-03-22 21:30 ` Dan Williams
2019-03-22 21:30 ` Dan Williams
2019-03-22 21:30 ` Dan Williams
2019-03-22 21:30 ` Dan Williams
2019-03-17 18:34 ` [RESEND 3/7] mm/gup: Change GUP fast to use flags rather than a write 'bool' ira.weiny
2019-03-17 18:34 ` ira.weiny
2019-03-17 18:34 ` ira.weiny
2019-03-22 22:05 ` Dan Williams
2019-03-22 22:05 ` Dan Williams
2019-03-22 22:05 ` Dan Williams
2019-03-22 22:05 ` Dan Williams
2019-03-22 22:05 ` Dan Williams
2019-03-25 8:26 ` Ira Weiny
2019-03-25 8:26 ` Ira Weiny
2019-03-25 8:26 ` Ira Weiny
2019-03-25 8:26 ` Ira Weiny
2019-03-17 18:34 ` [RESEND 4/7] mm/gup: Add FOLL_LONGTERM capability to GUP fast ira.weiny
2019-03-17 18:34 ` ira.weiny
2019-03-17 18:34 ` ira.weiny
2019-03-22 22:12 ` Dan Williams
2019-03-22 22:12 ` Dan Williams
2019-03-22 22:12 ` Dan Williams
2019-03-22 22:12 ` Dan Williams
2019-03-22 22:12 ` Dan Williams
2019-03-25 8:42 ` Ira Weiny
2019-03-25 8:42 ` Ira Weiny
2019-03-25 8:42 ` Ira Weiny
2019-03-25 8:42 ` Ira Weiny
2019-03-25 16:47 ` Jason Gunthorpe
2019-03-25 16:47 ` Jason Gunthorpe
2019-03-25 16:47 ` Jason Gunthorpe
2019-03-25 16:47 ` Jason Gunthorpe
2019-03-25 9:23 ` Ira Weiny
2019-03-25 9:23 ` Ira Weiny
2019-03-25 9:23 ` Ira Weiny
2019-03-25 9:23 ` Ira Weiny
2019-03-25 17:51 ` Jason Gunthorpe
2019-03-25 17:51 ` Jason Gunthorpe
2019-03-25 17:51 ` Jason Gunthorpe
2019-03-25 17:51 ` Jason Gunthorpe
2019-03-25 14:21 ` Ira Weiny
2019-03-25 14:21 ` Ira Weiny
2019-03-25 14:21 ` Ira Weiny
2019-03-25 14:21 ` Ira Weiny
2019-03-25 22:36 ` Dan Williams
2019-03-25 22:36 ` Dan Williams
2019-03-25 22:36 ` Dan Williams
2019-03-25 22:36 ` Dan Williams
2019-03-25 22:36 ` Dan Williams
2019-03-25 14:54 ` Ira Weiny
2019-03-25 14:54 ` Ira Weiny
2019-03-25 14:54 ` Ira Weiny
2019-03-25 14:54 ` Ira Weiny
2019-03-17 18:34 ` [RESEND 5/7] IB/hfi1: Use the new FOLL_LONGTERM flag to get_user_pages_fast() ira.weiny
2019-03-17 18:34 ` ira.weiny
2019-03-17 18:34 ` ira.weiny
2019-03-22 22:14 ` Dan Williams
2019-03-22 22:14 ` Dan Williams
2019-03-22 22:14 ` Dan Williams
2019-03-22 22:14 ` Dan Williams
2019-03-22 22:14 ` Dan Williams
2019-03-25 8:43 ` Ira Weiny
2019-03-25 8:43 ` Ira Weiny
2019-03-25 8:43 ` Ira Weiny
2019-03-25 8:43 ` Ira Weiny
2019-03-17 18:34 ` [RESEND 6/7] IB/qib: " ira.weiny
2019-03-17 18:34 ` ira.weiny
2019-03-17 18:34 ` ira.weiny
2019-03-22 22:15 ` Dan Williams
2019-03-22 22:15 ` Dan Williams
2019-03-22 22:15 ` Dan Williams
2019-03-22 22:15 ` Dan Williams
2019-03-22 22:15 ` Dan Williams
2019-03-17 18:34 ` [RESEND 7/7] IB/mthca: " ira.weiny
2019-03-17 18:34 ` ira.weiny
2019-03-17 18:34 ` ira.weiny
2019-03-19 22:19 ` [RESEND PATCH 0/7] Add FOLL_LONGTERM to GUP fast and use it Andrew Morton
2019-03-19 22:19 ` Andrew Morton
2019-03-19 22:19 ` Andrew Morton
2019-03-19 22:19 ` Andrew Morton
2019-03-21 8:40 ` Ira Weiny
2019-03-21 8:40 ` Ira Weiny
2019-03-21 8:40 ` Ira Weiny
2019-03-21 8:40 ` Ira Weiny
2019-02-20 5:30 ira.weiny
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