Messages by Date
-
2024/10/28
Re: [PATCH] nvdimm: fix possible null-ptr-deref in nd_dax_probe()
Dan Williams
-
2024/10/28
Re: [PATCH] nvdimm: fix possible null-ptr-deref in nd_dax_probe()
Ira Weiny
-
2024/10/25
[PATCH] nvdimm: fix possible null-ptr-deref in nd_dax_probe()
Yi Yang
-
2024/10/20
Re: Removing a misleading warning message?
Coly Li
-
2024/10/18
Re: [PATCH -next] nvdimm: Remove redundant null pointer checks
Ira Weiny
-
2024/10/18
Re: Removing a misleading warning message?
Dan Williams
-
2024/10/18
Re: Removing a misleading warning message?
Jonathan Cameron
-
2024/10/17
[ndctl PATCH v3 1/2] test/monitor.sh convert float to integer before increment
Li Zhijian
-
2024/10/17
[ndctl PATCH v3 2/2] test/monitor.sh: Fix shellcheck SC2086 issues as more as possible
Li Zhijian
-
2024/10/17
Re: [ndctl PATCH v2] test/monitor.sh: Fix 2 bash syntax errors
Alison Schofield
-
2024/10/17
Re: Removing a misleading warning message?
Alison Schofield
-
2024/10/16
Re: [ndctl PATCH v2] test/monitor.sh: Fix 2 bash syntax errors
Zhijian Li (Fujitsu)
-
2024/10/16
Re: [ndctl PATCH v2] test/monitor.sh: Fix 2 bash syntax errors
Alison Schofield
-
2024/10/16
Re: [ndctl PATCH v2] test/monitor.sh: Fix 2 bash syntax errors
Verma, Vishal L
-
2024/10/15
[ndctl PATCH v2] test/monitor.sh: Fix 2 bash syntax errors
Li Zhijian
-
2024/10/15
[ndctl PATCH] test/monitor.sh: Fix 2 bash syntax errors
Li Zhijian
-
2024/10/15
Re: [ndctl PATCH] test/security.sh: add missing jq requirement check
Alison Schofield
-
2024/10/13
Re: [ndctl PATCH] test/security.sh: add missing jq requirement check
Zhijian Li (Fujitsu)
-
2024/10/13
[ndctl PATCH] test/security.sh: add missing jq requirement check
Li Zhijian
-
2024/10/11
Removing a misleading warning message?
Coly Li
-
2024/10/10
[ANNOUNCE] ndctl v80
Alison Schofield
-
2024/10/05
Re: (subset) [PATCH 00/35] Reorganize kerneldoc parameter names
Bjorn Andersson
-
2024/09/30
Re: [PATCH -ndctl] cxl/memdev: Introduce sanitize-memdev functionality
Davidlohr Bueso
-
2024/09/30
Re: [PATCH -ndctl] cxl/memdev: Introduce sanitize-memdev functionality
Davidlohr Bueso
-
2024/09/30
Re: [PATCH -ndctl] cxl/memdev: Introduce sanitize-memdev functionality
Alison Schofield
-
2024/09/30
[PATCH 00/35] Reorganize kerneldoc parameter names
Julia Lawall
-
2024/09/23
Re: [GIT PULL] NVDIMM for 6.12
pr-tracker-bot
-
2024/09/22
[GIT PULL] NVDIMM for 6.12
Ira Weiny
-
2024/09/03
Re: [ndctl PATCH 2/2] test/daxctl-create.sh: use CXL DAX regions instead of efi_fake_mem
Verma, Vishal L
-
2024/09/03
Re: [ndctl PATCH] test/rescan-partitions.sh: refine search for created partition
Verma, Vishal L
-
2024/09/03
Re: [ndctl PATCH 1/2] test/daxctl-create.sh: use bash math syntax to find available size
Verma, Vishal L
-
2024/09/03
Re: [PATCH] btt: fix block integrity
Dave Jiang
-
2024/09/03
Re: [PATCH -next] nvdimm: Remove redundant null pointer checks
Dave Jiang
-
2024/09/03
[PATCH -next] nvdimm: Remove redundant null pointer checks
Li Zetao
-
2024/08/30
[PATCH] btt: fix block integrity
Keith Busch
-
2024/08/29
Re: [ndctl PATCH 2/2] test/daxctl-create.sh: use CXL DAX regions instead of efi_fake_mem
Alison Schofield
-
2024/08/29
Re: [ndctl PATCH 2/2] test/daxctl-create.sh: use CXL DAX regions instead of efi_fake_mem
Dan Williams
-
2024/08/28
[ndctl PATCH] test/rescan-partitions.sh: refine search for created partition
alison . schofield
-
2024/08/27
[ndctl PATCH 1/2] test/daxctl-create.sh: use bash math syntax to find available size
alison . schofield
-
2024/08/27
[ndctl PATCH 2/2] test/daxctl-create.sh: use CXL DAX regions instead of efi_fake_mem
alison . schofield
-
2024/08/27
[ndctl PATCH 0/2] Use CXL regions in daxctl-create unit test
alison . schofield
-
2024/08/26
Re: [ndctl PATCH v3 1/2] daxctl: Fail create-device if extra parameters are present
Alison Schofield
-
2024/08/22
Re: [ndctl PATCH v3 1/2] daxctl: Fail create-device if extra parameters are present
Zhijian Li (Fujitsu)
-
2024/08/21
Re: [ndctl PATCH] ndctl.spec.in: use SPDX formula for license
Verma, Vishal L
-
2024/08/21
[ndctl PATCH] ndctl.spec.in: use SPDX formula for license
alison . schofield
-
2024/08/21
Re: [ndctl PATCH] ndctl.spec.in: enable libtrace{event|fs} support for Fedora
Dave Jiang
-
2024/08/21
Re: [ndctl PATCH] ndctl.spec.in: enable libtrace{event|fs} support for Fedora
Verma, Vishal L
-
2024/08/21
Re: [PATCH ndctl 2/2] libndctl.c: major and minor numbers are unsigned
Verma, Vishal L
-
2024/08/21
Re: [PATCH ndctl 1/2] ndctl/keys.c: don't leak fd in error cases
Verma, Vishal L
-
2024/08/21
[ndctl PATCH] ndctl.spec.in: enable libtrace{event|fs} support for Fedora
alison . schofield
-
2024/08/20
Re: [PATCH ndctl 2/2] libndctl.c: major and minor numbers are unsigned
Dave Jiang
-
2024/08/20
Re: [PATCH ndctl 1/2] ndctl/keys.c: don't leak fd in error cases
Dave Jiang
-
2024/08/20
[PATCH ndctl 1/2] ndctl/keys.c: don't leak fd in error cases
jmoyer
-
2024/08/20
address some open scan hub warnings
jmoyer
-
2024/08/20
[PATCH ndctl 2/2] libndctl.c: major and minor numbers are unsigned
jmoyer
-
2024/08/09
Re: [ndctl PATCH] cxl/list: add firmware_version to default memdev listing
Dan Williams
-
2024/08/02
Re: [bug report][regression] Oops: general protection fault observed after destroy the devdax
Alison Schofield
-
2024/08/02
Re: [bug report][regression] Oops: general protection fault observed after destroy the devdax
Yi Zhang
-
2024/08/01
Re: [bug report][regression] Oops: general protection fault observed after destroy the devdax
Alison Schofield
-
2024/07/29
[bug report][regression] Oops: general protection fault observed after destroy the devdax
Yi Zhang
-
2024/07/25
Re: [ndctl PATCH] cxl/list: add firmware_version to default memdev listing
Dave Jiang
-
2024/07/25
Re: [ndctl PATCH] cxl/list: add firmware_version to default memdev listing
fan
-
2024/07/25
RE: [ndctl PATCH] cxl/list: add firmware_version to default memdev listing
Xingtao Yao (Fujitsu)
-
2024/07/25
[ndctl PATCH] cxl/list: add firmware_version to default memdev listing
alison . schofield
-
2024/07/24
Re: [ndctl PATCH v13 3/8] util/trace: pass an event_ctx to its own parse_event method
Dave Jiang
-
2024/07/24
Re: [ndctl PATCH v13 1/8] util/trace: move trace helpers from ndctl/cxl/ to ndctl/util/
Dave Jiang
-
2024/07/08
[ndctl PATCH] ndctl,cxl/test: Add a common unit test for creating pmem namespaces
alison . schofield
-
2024/07/08
Re: [ndctl PATCH v13 7/8] cxl/list: add --media-errors option to cxl list
Alison Schofield
-
2024/07/08
Re: [ndctl PATCH v13 6/8] cxl/list: collect and parse media_error records
Alison Schofield
-
2024/07/07
RE: [ndctl PATCH v13 7/8] cxl/list: add --media-errors option to cxl list
Xingtao Yao (Fujitsu)
-
2024/07/07
RE: [ndctl PATCH v13 8/8] cxl/test: add cxl-poison.sh unit test
Xingtao Yao (Fujitsu)
-
2024/07/07
RE: [ndctl PATCH v13 6/8] cxl/list: collect and parse media_error records
Xingtao Yao (Fujitsu)
-
2024/07/05
[ndctl PATCH v13 8/8] cxl/test: add cxl-poison.sh unit test
alison . schofield
-
2024/07/05
[ndctl PATCH v13 6/8] cxl/list: collect and parse media_error records
alison . schofield
-
2024/07/05
[ndctl PATCH v13 7/8] cxl/list: add --media-errors option to cxl list
alison . schofield
-
2024/07/05
[ndctl PATCH v13 5/8] libcxl: add interfaces for GET_POISON_LIST mailbox commands
alison . schofield
-
2024/07/05
[ndctl PATCH v13 4/8] util/trace: add helpers to retrieve tep fields by type
alison . schofield
-
2024/07/05
[ndctl PATCH v13 1/8] util/trace: move trace helpers from ndctl/cxl/ to ndctl/util/
alison . schofield
-
2024/07/05
[ndctl PATCH v13 3/8] util/trace: pass an event_ctx to its own parse_event method
alison . schofield
-
2024/07/05
[ndctl PATCH v13 2/8] util/trace: add an optional pid check to event parsing
alison . schofield
-
2024/07/05
[ndctl PATCH v13 0/8] Support poison list retrieval
alison . schofield
-
2024/07/02
Re: [PATCH 07/13] huge_memory: Allow mappings of PUD sized pages
Eliot Moss
-
2024/07/02
Re: [BUG REPORT] cxl process in infinity loop
Jonathan Cameron
-
2024/07/01
[BUG REPORT] cxl process in infinity loop
Xingtao Yao (Fujitsu)
-
2024/06/26
Re: [ndctl PATCH] cxl/test: add cxl_translate unit test
Dan Williams
-
2024/06/26
Re: [ndctl PATCH] cxl/test: add cxl_translate unit test
Dave Jiang
-
2024/06/25
Re: [ndctl PATCH] cxl/test: Add test case for region info to cxl-events.sh
Ira Weiny
-
2024/06/24
[ndctl PATCH] cxl/test: add cxl_translate unit test
alison . schofield
-
2024/06/05
[ndctl PATCH v3 2/2] daxctl: Remove unused options in create-device usage message
Li Zhijian
-
2024/06/05
[ndctl PATCH v3 1/2] daxctl: Fail create-device if extra parameters are present
Li Zhijian
-
2024/06/02
Re: [ndctl PATCH v2 2/2] daxctl: Remove unimplemented create-device options
Zhijian Li (Fujitsu)
-
2024/06/02
Re: [ndctl PATCH v2 1/2] daxctl: Fix create-device parameters parsing
Zhijian Li (Fujitsu)
-
2024/05/31
Re: [ndctl PATCH v2 2/2] daxctl: Remove unimplemented create-device options
Alison Schofield
-
2024/05/31
Re: [ndctl PATCH v2 1/2] daxctl: Fix create-device parameters parsing
Alison Schofield
-
2024/05/31
Re: [ndctl PATCH v2 2/2] daxctl: Remove unimplemented create-device options
Dave Jiang
-
2024/05/31
Re: [ndctl PATCH v2 1/2] daxctl: Fix create-device parameters parsing
Dave Jiang
-
2024/05/31
Re: [ndctl PATCH v2 2/2] daxctl: Remove unimplemented create-device options
Verma, Vishal L
-
2024/05/31
Re: [ndctl PATCH v2 1/2] daxctl: Fix create-device parameters parsing
Verma, Vishal L
-
2024/05/30
[ndctl PATCH v2 2/2] daxctl: Remove unimplemented create-device options
Li Zhijian
-
2024/05/30
[ndctl PATCH v2 1/2] daxctl: Fix create-device parameters parsing
Li Zhijian
-
2024/05/27
Re: [ndctl PATCH 2/2] daxctl: Fix create-device manual
Zhijian Li (Fujitsu)
-
2024/05/26
[ndctl PATCH 2/2] daxctl: Fix create-device manual
Li Zhijian
-
2024/05/26
[ndctl PATCH 1/2] daxctl: Fix create-device parameters parsing
Li Zhijian
-
2024/05/09
Re: [RFC 03/10] pci/p2pdma: Don't initialise page refcount to one
Alistair Popple
-
2024/05/09
Re: [RFC 03/10] pci/p2pdma: Don't initialise page refcount to one
Logan Gunthorpe
-
2024/05/06
Re: [PATCH ndctl 2/2] libndctl.c: major and minor numbers are unsigned
Verma, Vishal L
-
2024/05/06
Re: [PATCH ndctl 1/2] ndctl/keys.c: don't leak fd in error cases
Verma, Vishal L
-
2024/05/03
[PATCH ndctl 1/2] ndctl/keys.c: don't leak fd in error cases
jmoyer
-
2024/05/03
[PATCH ndctl 2/2] libndctl.c: major and minor numbers are unsigned
jmoyer
-
2024/05/03
[PATCH ndctl 0/2] fix errors pointed out by static analysis
jmoyer
-
2024/05/03
Re: [RFC PATCH v2 07/12] famfs prep: Add fs/super.c:kill_char_super()
John Groves
-
2024/05/03
Re: [RFC PATCH v2 08/12] famfs: module operations & fs_context
John Groves
-
2024/05/03
Re: [RFC PATCH v2 07/12] famfs prep: Add fs/super.c:kill_char_super()
Christian Brauner
-
2024/05/02
Re: [RFC PATCH v2 07/12] famfs prep: Add fs/super.c:kill_char_super()
John Groves
-
2024/05/02
Re: [RFC PATCH v2 10/12] famfs: Introduce file_operations read/write
John Groves
-
2024/05/02
Re: [RFC PATCH v2 08/12] famfs: module operations & fs_context
John Groves
-
2024/05/02
[ANNOUNCE] ndctl v79
Verma, Vishal L
-
2024/05/02
Re: [RFC PATCH v2 10/12] famfs: Introduce file_operations read/write
Al Viro
-
2024/05/02
Re: [RFC PATCH v2 08/12] famfs: module operations & fs_context
Al Viro
-
2024/05/02
Re: [RFC PATCH v2 07/12] famfs prep: Add fs/super.c:kill_char_super()
Al Viro
-
2024/05/02
Re: [RFC PATCH v2 08/12] famfs: module operations & fs_context
John Groves
-
2024/05/01
Re: [PATCH ndctl] Build: Fix deprecated str.format() usage
Dave Jiang
-
2024/05/01
Re: [PATCH ndctl] Build: Fix deprecated str.format() usage
Dan Williams
-
2024/05/01
[PATCH ndctl] Build: Fix deprecated str.format() usage
Vishal Verma
-
2024/04/30
Re: [RFC PATCH v2 00/12] Introduce the famfs shared-memory file system
John Groves
-
2024/04/30
Re: [RFC PATCH v2 00/12] Introduce the famfs shared-memory file system
Matthew Wilcox
-
2024/04/30
Re: [RFC PATCH v2 08/12] famfs: module operations & fs_context
Christian Brauner
-
2024/04/29
Re: [RFC PATCH v2 00/12] Introduce the famfs shared-memory file system
Kent Overstreet
-
2024/04/29
Re: [RFC PATCH v2 00/12] Introduce the famfs shared-memory file system
John Groves
-
2024/04/29
Re: [RFC PATCH v2 00/12] Introduce the famfs shared-memory file system
John Groves
-
2024/04/29
Re: [RFC PATCH v2 00/12] Introduce the famfs shared-memory file system
Kent Overstreet
-
2024/04/29
Re: [RFC PATCH v2 00/12] Introduce the famfs shared-memory file system
Matthew Wilcox
-
2024/04/29
[RFC PATCH v2 12/12] famfs: famfs_ioctl and core file-to-memory mapping logic & iomap_ops
John Groves
-
2024/04/29
[RFC PATCH v2 10/12] famfs: Introduce file_operations read/write
John Groves
-
2024/04/29
[RFC PATCH v2 11/12] famfs: Introduce mmap and VM fault handling
John Groves
-
2024/04/29
[RFC PATCH v2 09/12] famfs: Introduce inode_operations and super_operations
John Groves
-
2024/04/29
[RFC PATCH v2 07/12] famfs prep: Add fs/super.c:kill_char_super()
John Groves
-
2024/04/29
[RFC PATCH v2 08/12] famfs: module operations & fs_context
John Groves
-
2024/04/29
[RFC PATCH v2 06/12] dev_dax_iomap: export dax_dev_get()
John Groves
-
2024/04/29
[RFC PATCH v2 05/12] dev_dax_iomap: Add dax_operations for use by fs-dax on devdax
John Groves
-
2024/04/29
[RFC PATCH v2 04/12] dev_dax_iomap: Save the kva from memremap
John Groves
-
2024/04/29
[RFC PATCH v2 03/12] dev_dax_iomap: Add fs_dax_get() func to prepare dax for fs-dax usage
John Groves
-
2024/04/29
[RFC PATCH v2 02/12] dev_dax_iomap: Move dax_pgoff_to_phys() from device.c to bus.c
John Groves
-
2024/04/29
[RFC PATCH v2 01/12] famfs: Introduce famfs documentation
John Groves
-
2024/04/29
[RFC PATCH v2 00/12] Introduce the famfs shared-memory file system
John Groves
-
2024/04/29
Re: [PATCH 0/2] nvdimm: Convert to platform remove callback returning void
Uwe Kleine-König
-
2024/04/25
Re: [NDCTL PATCH v3 2/2] cxl: Add check for regions before disabling memdev
Zhijian Li (Fujitsu)
-
2024/04/25
Re: [ndctl PATCH v2] cxl/test: use max_available_extent in cxl-destroy-region
Ira Weiny
-
2024/04/25
Re: [NDCTL PATCH v3 2/2] cxl: Add check for regions before disabling memdev
Alison Schofield
-
2024/04/24
Re: [NDCTL PATCH v3 2/2] cxl: Add check for regions before disabling memdev
Zhijian Li (Fujitsu)
-
2024/04/24
Re: [Lsf-pc] [LSF/MM/BPF TOPIC] Famfs: shared memory file system for disaggregated memory [LSF/MM/BPF ATTEND]
John Groves
-
2024/04/23
[ndctl PATCH v2] cxl/test: use max_available_extent in cxl-destroy-region
alison . schofield
-
2024/04/23
Re: [Lsf-pc] [LSF/MM/BPF TOPIC] Famfs: shared memory file system for disaggregated memory [LSF/MM/BPF ATTEND]
Amir Goldstein
-
2024/04/22
Re: [ndctl PATCH] cxl/test: use max_available_extent in cxl-destroy-region
Alison Schofield
-
2024/04/22
Re: [ndctl PATCH] cxl/test: use max_available_extent in cxl-destroy-region
Verma, Vishal L
-
2024/04/22
RE: Re:
Xingtao Yao (Fujitsu)
-
2024/04/18
Re: [ndctl PATCH v11 6/7] cxl/list: add --media-errors option to cxl list
Alison Schofield
-
2024/04/17
Re: [NDCTL PATCH v2] ndctl: cxl: Remove dependency for attributes derived from IDENTIFY command
Verma, Vishal L
-
2024/04/17
Re:
Verma, Vishal L
-
2024/04/16
[no subject]
Yao Xingtao
-
2024/04/15
Re: [RFC 04/10] fs/dax: Don't track page mapping/index
Dan Williams
-
2024/04/15
Re: [RFC 04/10] fs/dax: Don't track page mapping/index
Alistair Popple
-
2024/04/15
Re: [RFC 04/10] fs/dax: Don't track page mapping/index
Dan Williams
-
2024/04/15
Re: [PATCH ndctl 2/2] daxctl/device.c: Fix error propagation in do_xaction_device()
Dave Jiang
-
2024/04/15
Re: [PATCH ndctl 1/2] daxctl/device.c: Handle special case of destroying daxX.0
Dave Jiang
-
2024/04/15
Re: [RFC 05/10] fs/dax: Refactor wait for dax idle page
Alistair Popple
-
2024/04/15
Re: [RFC 04/10] fs/dax: Don't track page mapping/index
Alistair Popple
-
2024/04/13
Re: [RFC 05/10] fs/dax: Refactor wait for dax idle page
John Hubbard
-
2024/04/12
Re: [PATCH ndctl 2/2] daxctl/device.c: Fix error propagation in do_xaction_device()
Verma, Vishal L
-
2024/04/12
Re: [PATCH ndctl 2/2] daxctl/device.c: Fix error propagation in do_xaction_device()
Dan Williams
-
2024/04/12
Re: [PATCH ndctl 1/2] daxctl/device.c: Handle special case of destroying daxX.0
Dan Williams
-
2024/04/12
[PATCH ndctl 0/2] daxctl: Fix error handling and propagation in daxctl/device.c
Vishal Verma
-
2024/04/12
[PATCH ndctl 2/2] daxctl/device.c: Fix error propagation in do_xaction_device()
Vishal Verma
-
2024/04/12
[PATCH ndctl 1/2] daxctl/device.c: Handle special case of destroying daxX.0
Vishal Verma
-
2024/04/12
Re: [RFC 00/10] fs/dax: Fix FS DAX page reference counts
Dan Williams
-
2024/04/12
Re: [RFC 04/10] fs/dax: Don't track page mapping/index
Dan Williams
-
2024/04/12
RE: [RFC 04/10] fs/dax: Don't track page mapping/index
Dan Williams
-
2024/04/12
RE: [RFC 03/10] pci/p2pdma: Don't initialise page refcount to one
Dan Williams
-
2024/04/12
Re: [RFC 04/10] fs/dax: Don't track page mapping/index
Jan Kara
-
2024/04/12
Re: [RFC 05/10] fs/dax: Refactor wait for dax idle page
Jan Kara
-
2024/04/12
Re: [PATCH] ndtest: Convert to platform remove callback returning void
Uwe Kleine-König
-
2024/04/12
Re: [RFC 00/10] fs/dax: Fix FS DAX page reference counts
Jason Gunthorpe
-
2024/04/12
Re: [RFC 00/10] fs/dax: Fix FS DAX page reference counts
Alistair Popple
-
2024/04/11
Re: [RFC 03/10] pci/p2pdma: Don't initialise page refcount to one
Alistair Popple
-
2024/04/11
Re: [RFC 00/10] fs/dax: Fix FS DAX page reference counts
Alistair Popple
-
2024/04/11
Re: [RFC 07/10] mm: Allow compound zone device pages
Alistair Popple
-
2024/04/11
Re: [RFC 01/10] mm/gup.c: Remove redundant check for PCI P2PDMA page
Alistair Popple
-
2024/04/11
Re: [RFC 09/10] mm/khugepage.c: Warn if trying to scan devmap pmd
Alistair Popple
-
2024/04/11
Re: [RFC 02/10] mm/hmm: Remove dead check for HugeTLB and FS DAX
Alistair Popple
-
2024/04/11
Re: [RFC 00/10] fs/dax: Fix FS DAX page reference counts
Dan Williams
-
2024/04/11
Re: [RFC 00/10] fs/dax: Fix FS DAX page reference counts
Jason Gunthorpe
-
2024/04/11
Re: [RFC 00/10] fs/dax: Fix FS DAX page reference counts
Dan Williams
-
2024/04/11
Re: [RFC 07/10] mm: Allow compound zone device pages
Matthew Wilcox
-
2024/04/11
Re: [RFC 01/10] mm/gup.c: Remove redundant check for PCI P2PDMA page
David Hildenbrand
-
2024/04/11
Re: [RFC 09/10] mm/khugepage.c: Warn if trying to scan devmap pmd
David Hildenbrand
-
2024/04/11
Re: [RFC 02/10] mm/hmm: Remove dead check for HugeTLB and FS DAX
Peter Xu
-
2024/04/11
Re: [RFC 01/10] mm/gup.c: Remove redundant check for PCI P2PDMA page
Jason Gunthorpe
-
2024/04/11
Re: [RFC 10/10] mm: Remove pXX_devmap
Jason Gunthorpe
-
2024/04/11
Re: [RFC 07/10] mm: Allow compound zone device pages
Jason Gunthorpe
-
2024/04/11
Re: [RFC 03/10] pci/p2pdma: Don't initialise page refcount to one
Jason Gunthorpe