From: Logan Gunthorpe <logang@deltatee.com>
To: linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org,
linux-block@vger.kernel.org, linux-pci@vger.kernel.org,
linux-mm@kvack.org
Cc: "Christoph Hellwig" <hch@lst.de>,
"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
"Dan Williams" <dan.j.williams@intel.com>,
"Jason Gunthorpe" <jgg@ziepe.ca>,
"Christian König" <christian.koenig@amd.com>,
"John Hubbard" <jhubbard@nvidia.com>,
"Don Dutile" <ddutile@redhat.com>,
"Matthew Wilcox" <willy@infradead.org>,
"Daniel Vetter" <daniel.vetter@ffwll.ch>,
"Minturn Dave B" <dave.b.minturn@intel.com>,
"Jason Ekstrand" <jason@jlekstrand.net>,
"Dave Hansen" <dave.hansen@linux.intel.com>,
"Xiong Jianxin" <jianxin.xiong@intel.com>,
"Bjorn Helgaas" <helgaas@kernel.org>,
"Ira Weiny" <ira.weiny@intel.com>,
"Robin Murphy" <robin.murphy@arm.com>,
"Martin Oliveira" <martin.oliveira@eideticom.com>,
"Chaitanya Kulkarni" <ckulkarnilinux@gmail.com>,
"Ralph Campbell" <rcampbell@nvidia.com>,
"Stephen Bates" <sbates@raithlin.com>,
"Logan Gunthorpe" <logang@deltatee.com>
Subject: [PATCH v10 0/8] Userspace P2PDMA with O_DIRECT NVMe devices
Date: Thu, 22 Sep 2022 10:39:18 -0600 [thread overview]
Message-ID: <20220922163926.7077-1-logang@deltatee.com> (raw)
Hi,
This is the latest P2PDMA userspace patch set. This version includes
some cleanup from feedback of the last posting[1].
This patch set enables userspace P2PDMA by allowing userspace to mmap()
allocated chunks of the CMB. The resulting VMA can be passed only
to O_DIRECT IO on NVMe backed files or block devices. A flag is added
to GUP() in Patch 1, then Patches 2 through 6 wire this flag up based
on whether the block queue indicates P2PDMA support. Patches 7
creates the sysfs resource that can hand out the VMAs and Patch 8
adds brief documentation for the new interface.
Feedback welcome.
This series is based on v6.0-rc6. A git branch is available here:
https://github.com/sbates130272/linux-p2pmem/ p2pdma_user_cmb_v10
Thanks,
Logan
[1] https://lkml.kernel.org/r/20220825152425.6296-1-logang@deltatee.com
--
Changes since v8:
- Rebased onto v6.0-rc6
- Reworked iov iter changes to reuse the code better and
name them without the _flags() prefix (per Christoph)
- Renamed a number of flags variables to gup_flags (per John)
- Minor fixups to the last documentation patch (from Greg and John)
Changes since v7:
- Rebased onto v6.0-rc2, included reworking the iov_iter patch
due to changes there
- Drop the char device mmap implementation in favour of a sysfs
based interface. (per Christoph)
Changes since v6:
- Rebase onto v5.19-rc1
- Rework how the pages are stored in the VMA per Jason's suggestion
Changes since v5:
- Rebased onto v5.18-rc1 which includes Christophs cleanup to
free_zone_device_page() (similar to Ralph's patch).
- Fix bug with concurrent first calls to pci_p2pdma_vma_fault()
that caused a double allocation and lost p2p memory. Noticed
by Andrew Maier.
- Collected a Reviewed-by tag from Chaitanya.
- Numerous minor fixes to commit messages
--
Logan Gunthorpe (8):
mm: introduce FOLL_PCI_P2PDMA to gate getting PCI P2PDMA pages
iov_iter: introduce iov_iter_get_pages_[alloc_]flags()
block: add check when merging zone device pages
lib/scatterlist: add check when merging zone device pages
block: set FOLL_PCI_P2PDMA in __bio_iov_iter_get_pages()
block: set FOLL_PCI_P2PDMA in bio_map_user_iov()
PCI/P2PDMA: Allow userspace VMA allocations through sysfs
ABI: sysfs-bus-pci: add documentation for p2pmem allocate
Documentation/ABI/testing/sysfs-bus-pci | 10 ++
block/bio.c | 11 ++-
block/blk-map.c | 7 +-
drivers/pci/p2pdma.c | 124 ++++++++++++++++++++++++
include/linux/mm.h | 1 +
include/linux/mmzone.h | 24 +++++
include/linux/uio.h | 6 ++
lib/iov_iter.c | 32 ++++--
lib/scatterlist.c | 25 +++--
mm/gup.c | 22 ++++-
10 files changed, 240 insertions(+), 22 deletions(-)
base-commit: 521a547ced6477c54b4b0cc206000406c221b4d6
--
2.30.2
next reply other threads:[~2022-09-22 16:39 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-22 16:39 Logan Gunthorpe [this message]
2022-09-22 16:39 ` [PATCH v10 1/8] mm: introduce FOLL_PCI_P2PDMA to gate getting PCI P2PDMA pages Logan Gunthorpe
2022-09-23 18:13 ` Jason Gunthorpe
2022-09-23 19:08 ` Logan Gunthorpe
2022-09-23 19:53 ` Jason Gunthorpe
2022-09-23 20:11 ` Logan Gunthorpe
2022-09-23 22:58 ` Jason Gunthorpe
2022-09-23 23:01 ` Logan Gunthorpe
2022-09-23 23:07 ` Jason Gunthorpe
2022-09-23 23:14 ` Logan Gunthorpe
2022-09-23 23:21 ` Jason Gunthorpe
2022-09-23 23:35 ` Logan Gunthorpe
2022-09-23 23:51 ` Logan Gunthorpe
2022-09-26 22:57 ` Jason Gunthorpe
2022-09-28 21:38 ` Logan Gunthorpe
2022-09-22 16:39 ` [PATCH v10 2/8] iov_iter: introduce iov_iter_get_pages_[alloc_]flags() Logan Gunthorpe
2022-09-22 16:39 ` [PATCH v10 3/8] block: add check when merging zone device pages Logan Gunthorpe
2022-09-22 16:39 ` [PATCH v10 4/8] lib/scatterlist: " Logan Gunthorpe
2022-09-22 16:39 ` [PATCH v10 5/8] block: set FOLL_PCI_P2PDMA in __bio_iov_iter_get_pages() Logan Gunthorpe
2022-09-22 16:39 ` [PATCH v10 6/8] block: set FOLL_PCI_P2PDMA in bio_map_user_iov() Logan Gunthorpe
2022-09-22 16:39 ` [PATCH v10 7/8] PCI/P2PDMA: Allow userspace VMA allocations through sysfs Logan Gunthorpe
2022-09-22 18:27 ` Bjorn Helgaas
2022-09-23 8:15 ` Greg Kroah-Hartman
2022-09-22 16:39 ` [PATCH v10 8/8] ABI: sysfs-bus-pci: add documentation for p2pmem allocate Logan Gunthorpe
2022-09-23 8:15 ` Greg Kroah-Hartman
2022-09-23 6:01 ` [PATCH v10 0/8] Userspace P2PDMA with O_DIRECT NVMe devices Christoph Hellwig
2022-09-23 15:25 ` Logan Gunthorpe
2022-09-23 8:16 ` Greg Kroah-Hartman
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