Displaying 20 results from an estimated 82 matches for "memremap".
2019 Jun 26
0
[PATCH 08/25] memremap: validate the pagemap type passed to devm_memremap_pages
...or a type that is valid for the current configuration
before setting up the pagemap. For this the usage of the 0 type for
device dax gets replaced with an explicit MEMORY_DEVICE_DEVDAX type.
Signed-off-by: Christoph Hellwig <hch at lst.de>
---
drivers/dax/device.c | 1 +
include/linux/memremap.h | 8 ++++++++
kernel/memremap.c | 22 ++++++++++++++++++++++
3 files changed, 31 insertions(+)
diff --git a/drivers/dax/device.c b/drivers/dax/device.c
index 8465d12fecba..79014baa782d 100644
--- a/drivers/dax/device.c
+++ b/drivers/dax/device.c
@@ -468,6 +468,7 @@ int dev_dax_probe(stru...
2020 Mar 16
0
[PATCH 1/4] memremap: add an owner field to struct dev_pagemap
...e hmm and migrate_vma code to identify who owns ZONE_DEVICE memory,
and refuse to work on mappings not owned by the calling entity.
Signed-off-by: Christoph Hellwig <hch at lst.de>
---
arch/powerpc/kvm/book3s_hv_uvmem.c | 2 ++
drivers/gpu/drm/nouveau/nouveau_dmem.c | 1 +
include/linux/memremap.h | 4 ++++
mm/memremap.c | 4 ++++
4 files changed, 11 insertions(+)
diff --git a/arch/powerpc/kvm/book3s_hv_uvmem.c b/arch/powerpc/kvm/book3s_hv_uvmem.c
index 79b1202b1c62..67fefb03b9b7 100644
--- a/arch/powerpc/kvm/book3s_hv_uvmem.c
+++ b/arch/powerpc/kvm/...
2019 Jun 13
0
[PATCH 11/22] memremap: remove the data field in struct dev_pagemap
struct dev_pagemap is always embedded into a containing structure, so
there is no need to an additional private data field.
Signed-off-by: Christoph Hellwig <hch at lst.de>
---
drivers/nvdimm/pmem.c | 2 +-
include/linux/memremap.h | 3 +--
kernel/memremap.c | 2 +-
mm/hmm.c | 9 +++++----
4 files changed, 8 insertions(+), 8 deletions(-)
diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c
index 66837eed6375..847d1b2bc10e 100644
--- a/drivers/nvdimm/pmem.c
+++ b/drivers/nvdimm/pmem.c
@@ -334,7...
2019 Jun 13
0
[PATCH 08/22] memremap: pass a struct dev_pagemap to ->kill
...he actual typed structure leads to more understandable code
vs the actual references.
Signed-off-by: Christoph Hellwig <hch at lst.de>
---
drivers/dax/device.c | 7 +++----
drivers/nvdimm/pmem.c | 6 +++---
drivers/pci/p2pdma.c | 6 +++---
include/linux/memremap.h | 2 +-
kernel/memremap.c | 4 ++--
mm/hmm.c | 4 ++--
tools/testing/nvdimm/test/iomap.c | 6 ++----
7 files changed, 16 insertions(+), 19 deletions(-)
diff --git a/drivers/dax/device.c b/drivers/dax/device.c
index 4adab774dade..e23fa1bd8c97 1006...
2019 Jun 13
0
[PATCH 10/22] memremap: add a migrate callback to struct dev_pagemap_ops
This replaces the hacky ->fault callback, which is currently directly
called from common code through a hmm specific data structure as an
exercise in layering violations.
Signed-off-by: Christoph Hellwig <hch at lst.de>
---
include/linux/hmm.h | 6 ------
include/linux/memremap.h | 6 ++++++
include/linux/swapops.h | 15 ---------------
kernel/memremap.c | 31 -------------------------------
mm/hmm.c | 13 +++++--------
mm/memory.c | 9 ++-------
6 files changed, 13 insertions(+), 67 deletions(-)
diff --git a/include/linux/hmm.h b/i...
2019 Jun 26
0
[PATCH 12/25] memremap: add a migrate_to_ram method to struct dev_pagemap_ops
...ich is currently directly
called from common code through a hmm specific data structure as an
exercise in layering violations.
Signed-off-by: Christoph Hellwig <hch at lst.de>
Reviewed-by: Ralph Campbell <rcampbell at nvidia.com>
---
include/linux/hmm.h | 6 ------
include/linux/memremap.h | 6 ++++++
include/linux/swapops.h | 15 ---------------
kernel/memremap.c | 35 ++++-------------------------------
mm/hmm.c | 13 +++++--------
mm/memory.c | 9 ++-------
6 files changed, 17 insertions(+), 67 deletions(-)
diff --git a/include/linux/hmm.h...
2019 Jun 13
1
[PATCH 10/22] memremap: add a migrate callback to struct dev_pagemap_ops
...->fault callback, which is currently directly
> called from common code through a hmm specific data structure as an
> exercise in layering violations.
>
> Signed-off-by: Christoph Hellwig <hch at lst.de>
> ---
> include/linux/hmm.h | 6 ------
> include/linux/memremap.h | 6 ++++++
> include/linux/swapops.h | 15 ---------------
> kernel/memremap.c | 31 -------------------------------
> mm/hmm.c | 13 +++++--------
> mm/memory.c | 9 ++-------
> 6 files changed, 13 insertions(+), 67 deletions(-)
>
&...
2019 Jun 17
2
[PATCH 07/25] memremap: validate the pagemap type passed to devm_memremap_pages
...h at lst.de> wrote:
>
> Most pgmap types are only supported when certain config options are
> enabled. Check for a type that is valid for the current configuration
> before setting up the pagemap.
>
> Signed-off-by: Christoph Hellwig <hch at lst.de>
> ---
> kernel/memremap.c | 27 +++++++++++++++++++++++++++
> 1 file changed, 27 insertions(+)
>
> diff --git a/kernel/memremap.c b/kernel/memremap.c
> index 6e1970719dc2..6a2dd31a6250 100644
> --- a/kernel/memremap.c
> +++ b/kernel/memremap.c
> @@ -157,6 +157,33 @@ void *devm_memremap_pages(struct de...
2019 Jun 26
0
[PATCH 15/25] memremap: provide an optional internal refcount in struct dev_pagemap
Provide an internal refcounting logic if no ->ref field is provided
in the pagemap passed into devm_memremap_pages so that callers don't
have to reinvent it poorly.
Signed-off-by: Christoph Hellwig <hch at lst.de>
---
include/linux/memremap.h | 4 ++
kernel/memremap.c | 64 ++++++++++++++++++++++++-------
tools/testing/nvdimm/test/iomap.c | 58 ++++++++++++++++++++++--...
2019 Jun 17
0
[PATCH 07/25] memremap: validate the pagemap type passed to devm_memremap_pages
Most pgmap types are only supported when certain config options are
enabled. Check for a type that is valid for the current configuration
before setting up the pagemap.
Signed-off-by: Christoph Hellwig <hch at lst.de>
---
kernel/memremap.c | 27 +++++++++++++++++++++++++++
1 file changed, 27 insertions(+)
diff --git a/kernel/memremap.c b/kernel/memremap.c
index 6e1970719dc2..6a2dd31a6250 100644
--- a/kernel/memremap.c
+++ b/kernel/memremap.c
@@ -157,6 +157,33 @@ void *devm_memremap_pages(struct device *dev, struct dev_pagemap *pgm...
2019 Jun 26
1
[PATCH 15/25] memremap: provide an optional internal refcount in struct dev_pagemap
On Wed, Jun 26, 2019 at 02:27:14PM +0200, Christoph Hellwig wrote:
> Provide an internal refcounting logic if no ->ref field is provided
> in the pagemap passed into devm_memremap_pages so that callers don't
> have to reinvent it poorly.
>
> Signed-off-by: Christoph Hellwig <hch at lst.de>
> ---
> include/linux/memremap.h | 4 ++
> kernel/memremap.c | 64 ++++++++++++++++++++++++-------
> tools/testing/nvdimm/test/io...
2019 Jun 13
0
[PATCH 07/22] memremap: move dev_pagemap callbacks into a separate structure
...for multiple
instances, and an attacker can't easily overwrite them.
Signed-off-by: Christoph Hellwig <hch at lst.de>
---
drivers/dax/device.c | 6 +++++-
drivers/nvdimm/pmem.c | 18 +++++++++++++-----
drivers/pci/p2pdma.c | 5 ++++-
include/linux/memremap.h | 29 +++++++++++++++--------------
kernel/memremap.c | 12 ++++++------
mm/hmm.c | 8 ++++++--
tools/testing/nvdimm/test/iomap.c | 2 +-
7 files changed, 50 insertions(+), 30 deletions(-)
diff --git a/drivers/dax/device.c b/drivers/dax/device....
2019 Jun 26
0
[PATCH 14/25] memremap: replace the altmap_valid field with a PGMAP_ALTMAP_VALID flag
...d the optional altmap and clean up the code using the altmap using
it.
Signed-off-by: Christoph Hellwig <hch at lst.de>
---
arch/powerpc/mm/mem.c | 10 +---------
arch/x86/mm/init_64.c | 8 ++------
drivers/nvdimm/pfn_devs.c | 3 +--
drivers/nvdimm/pmem.c | 1 -
include/linux/memremap.h | 12 +++++++++++-
kernel/memremap.c | 26 ++++++++++----------------
mm/hmm.c | 1 -
mm/memory_hotplug.c | 6 ++----
mm/page_alloc.c | 5 ++---
9 files changed, 29 insertions(+), 43 deletions(-)
diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/me...
2020 Sep 14
5
[PATCH] mm: remove extra ZONE_DEVICE struct page refcount
...that ZONE_DEVICE
struct page reference counting is ugly/broken. This is my attempt to
fix it and it works for the HMM migration self tests.
I'm only sending this out as a RFC since I'm not that familiar with the
DAX, PMEM, XEN, and other uses of ZONE_DEVICE struct pages allocated
with devm_memremap_pages() or memremap_pages() but my best reading of
the code looks like it might be OK. I could use help testing these
configurations.
I have a modified THP migration patch series that applies on top of
this one and is cleaner since I don't have to add code to handle the
+1 reference count. The...
2019 Jun 13
0
[PATCH 09/22] memremap: lift the devmap_enable manipulation into devm_memremap_pages
Just check if there is a ->page_free operation set and take care of the
static key enable, as well as the put using device managed resources.
Signed-off-by: Christoph Hellwig <hch at lst.de>
---
drivers/nvdimm/pmem.c | 23 +++--------------
include/linux/mm.h | 10 --------
kernel/memremap.c | 59 +++++++++++++++++++++++++++----------------
mm/hmm.c | 2 --
4 files changed, 41 insertions(+), 53 deletions(-)
diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c
index b9638c6553a1..66837eed6375 100644
--- a/drivers/nvdimm/pmem.c
+++ b/drivers/nvdimm/pmem.c
@@ -3...
2019 Jun 17
0
[PATCH 08/25] memremap: move dev_pagemap callbacks into a separate structure
...ang at deltatee.com>
Reviewed-by: Jason Gunthorpe <jgg at mellanox.com>
---
drivers/dax/device.c | 11 ++++++----
drivers/dax/pmem/core.c | 2 +-
drivers/nvdimm/pmem.c | 19 +++++++++-------
drivers/pci/p2pdma.c | 9 +++++---
include/linux/memremap.h | 36 +++++++++++++++++--------------
kernel/memremap.c | 18 ++++++++--------
mm/hmm.c | 10 ++++++---
tools/testing/nvdimm/test/iomap.c | 9 ++++----
8 files changed, 65 insertions(+), 49 deletions(-)
diff --git a/drivers/dax/device.c b/driver...
2019 Jun 17
0
[PATCH 10/25] memremap: lift the devmap_enable manipulation into devm_memremap_pages
...the fact that hmm never called
dev_pagemap_put_ops and thus would leave the slow path enabled forever,
even after a device driver unload or disable.
Signed-off-by: Christoph Hellwig <hch at lst.de>
---
drivers/nvdimm/pmem.c | 23 +++--------------
include/linux/mm.h | 10 --------
kernel/memremap.c | 57 ++++++++++++++++++++++++++-----------------
mm/hmm.c | 2 --
4 files changed, 39 insertions(+), 53 deletions(-)
diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c
index 469a0f5b3380..85364c59c607 100644
--- a/drivers/nvdimm/pmem.c
+++ b/drivers/nvdimm/pmem.c
@@ -3...
2020 Sep 26
1
[PATCH 2/2] mm: remove extra ZONE_DEVICE struct page refcount
...be treated specially for ZONE_DEVICE.
>
> Signed-off-by: Ralph Campbell <rcampbell at nvidia.com>
> ---
> arch/powerpc/kvm/book3s_hv_uvmem.c | 2 +-
> drivers/gpu/drm/nouveau/nouveau_dmem.c | 2 +-
> include/linux/dax.h | 2 +-
> include/linux/memremap.h | 7 ++-
> include/linux/mm.h | 44 --------------
> lib/test_hmm.c | 2 +-
> mm/gup.c | 44 --------------
> mm/internal.h | 8 +++
> mm/memremap.c...
2019 Jun 26
0
[PATCH 11/25] memremap: lift the devmap_enable manipulation into devm_memremap_pages
...the fact that hmm never called
dev_pagemap_put_ops and thus would leave the slow path enabled forever,
even after a device driver unload or disable.
Signed-off-by: Christoph Hellwig <hch at lst.de>
---
drivers/nvdimm/pmem.c | 23 +++--------------
include/linux/mm.h | 10 --------
kernel/memremap.c | 59 +++++++++++++++++++++++++++----------------
mm/hmm.c | 2 --
4 files changed, 41 insertions(+), 53 deletions(-)
diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c
index 9dac48359353..48767171a4df 100644
--- a/drivers/nvdimm/pmem.c
+++ b/drivers/nvdimm/pmem.c
@@ -3...
2019 Jun 26
1
[PATCH 11/25] memremap: lift the devmap_enable manipulation into devm_memremap_pages
...pagemap_put_ops and thus would leave the slow path enabled forever,
> even after a device driver unload or disable.
>
> Signed-off-by: Christoph Hellwig <hch at lst.de>
> ---
> drivers/nvdimm/pmem.c | 23 +++--------------
> include/linux/mm.h | 10 --------
> kernel/memremap.c | 59 +++++++++++++++++++++++++++----------------
> mm/hmm.c | 2 --
> 4 files changed, 41 insertions(+), 53 deletions(-)
>
> diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c
> index 9dac48359353..48767171a4df 100644
> --- a/drivers/nvdimm/pmem.c
>...