1-2 Rebased Ralph Campbell's ZONE_DEVICE page refcounting patches.
Patches 4-5 are for context to show how we are looking up the SPM
memory and registering it with devmap.
Patches 3,6-8 are the changes we are trying to upstream or rework to
make them acceptable upstream.
Patches 9-13 add ZON
ref count functionality was missing on fuse/dax.c.
Signed-off-by: Ralph Campbell
Signed-off-by: Alex Sierra
---
fs/dax.c| 4 ++--
fs/ext4/inode.c | 5 +
fs/fuse/dax.c | 4 +---
fs/xfs/xfs_file.c | 4 +---
include/linux/dax.h | 10 ++
5 files changed, 15
Two helpers added. One checks if zone device page is generic
type. The other if page is either private or generic type.
Signed-off-by: Alex Sierra
---
include/linux/mm.h | 8
1 file changed, 8 insertions(+)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index c0fcb47d7641
claim it as MEMORY_DEVICE_GENERIC using
devm_memremap_pages.
Signed-off-by: Alex Sierra
---
kernel/resource.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/kernel/resource.c b/kernel/resource.c
index 627e61b0c124..2d4abd395c73 100644
--- a/kernel/resource.c
+++ b/kernel/resource.c
@@ -783,6
Add MEMORY_DEVICE_GENERIC case to free_zone_device_page callback.
Device generic type memory case is now able to free its pages properly.
Signed-off-by: Alex Sierra
---
mm/memremap.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/mm/memremap.c b/mm/memremap.c
index
Generic device type memory on VRAM to RAM migration,
has similar access as System RAM from the CPU. This flag sets
the source from the sender. Which in Generic type case,
should be set as SYSTEM.
Signed-off-by: Alex Sierra
Reviewed-by: Felix Kuehling
---
drivers/gpu/drm/amd/amdkfd
migrate_ping_pong test case added to test explicit migration
from device to sys memory for both private and generic
zone types.
Helpers to migrate from device to sys memory and vicerversa
were also added.
Signed-off-by: Alex Sierra
---
tools/testing/selftests/vm/hmm-tests.c | 142
ed to zero.
Signed-off-by: Ralph Campbell
Signed-off-by: Alex Sierra
---
arch/powerpc/kvm/book3s_hv_uvmem.c | 2 +-
drivers/gpu/drm/nouveau/nouveau_dmem.c | 2 +-
fs/dax.c | 4 +-
include/linux/dax.h| 2 +-
include/linux/memre
.
Signed-off-by: Alex Sierra
Reviewed-by: Felix Kuehling
---
drivers/gpu/drm/amd/amdkfd/kfd_migrate.c | 17 -
1 file changed, 12 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c
b/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c
index 21b86c35a4f2
Device generic type case added for migrate_vma_pages and
migrate_vma_check_page helpers.
Both, generic and private device types have the same
conditions to decide to migrate pages from/to device
memory.
Signed-off-by: Alex Sierra
---
mm/migrate.c | 20 +---
1 file changed, 9
new ioctl cmd added to query zone device type. This will be
used once the test_hmm adds zone device generic type.
Signed-off-by: Alex Sierra
---
lib/test_hmm.c | 15 ++-
lib/test_hmm_uapi.h | 7 +++
2 files changed, 21 insertions(+), 1 deletion(-)
diff --git a/lib
ap.type = MEMORY_DEVICE_PRIVATE at
dmirror_allocate_chunk that was forcing to configure pagemap.type
to MEMORY_DEVICE_PRIVATE
Signed-off-by: Alex Sierra
---
lib/test_hmm.c | 46 -
lib/test_hmm_uapi.h | 1 +
2 files changed, 34 insertions(+), 13 deletions(-)
diff --gi
supports two different SP ranges
of at least 256MB size. This could be specified in the
kernel parameter variable efi_fake_mem. Ex. Two SP ranges
of 1GB starting at 0x1 & 0x14000 physical address.
efi_fake_mem=1G@0x1:0x4,1G@0x14000:0x4
Signed-off-by: Alex Si
Add two more parameters to set spm_addr_dev0 & spm_addr_dev1
addresses. These two parameters configure the start SP
addresses for each device in test_hmm driver.
Consequently, this configures zone device type as generic.
Signed-off-by: Alex Sierra
---
tools/testing/selftests/vm/test_hmm.sh
ed to zero.
Signed-off-by: Ralph Campbell
Signed-off-by: Alex Sierra
---
arch/powerpc/kvm/book3s_hv_uvmem.c | 2 +-
drivers/gpu/drm/nouveau/nouveau_dmem.c | 2 +-
fs/dax.c | 4 +-
include/linux/dax.h| 2 +-
include/linux/memre
g directories:
$sudo mkdir /mnt/ram0
$sudo mkdir /mnt/ram1
Everytime you boot, you need to create ext4 file system for the emulated
persistent memory partitions.
$sudo mkfs.ext4 /dev/pmem0
$sudo mkfs.ext4 /dev/pmem1
To run the tests:
$sudo ./check -g quick
Alex Sierra (11):
kernel: resource: lo
ref count functionality was missing on fuse/dax.c.
Signed-off-by: Ralph Campbell
Signed-off-by: Alex Sierra
---
fs/dax.c| 4 ++--
fs/ext4/inode.c | 5 +
fs/fuse/dax.c | 4 +---
fs/xfs/xfs_file.c | 4 +---
include/linux/dax.h | 10 ++
5 files changed, 15
.
Signed-off-by: Alex Sierra
Reviewed-by: Felix Kuehling
---
drivers/gpu/drm/amd/amdkfd/kfd_migrate.c | 17 -
1 file changed, 12 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c
b/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c
index dab290a4d19d
Generic device type memory on VRAM to RAM migration,
has similar access as System RAM from the CPU. This flag sets
the source from the sender. Which in Generic type case,
should be set as SYSTEM.
Signed-off-by: Alex Sierra
Reviewed-by: Felix Kuehling
---
drivers/gpu/drm/amd/amdkfd
Add MEMORY_DEVICE_GENERIC case to free_zone_device_page callback.
Device generic type memory case is now able to free its pages properly.
Signed-off-by: Alex Sierra
---
mm/memremap.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/mm/memremap.c b/mm/memremap.c
index
new ioctl cmd added to query zone device type. This will be
used once the test_hmm adds zone device generic type.
Signed-off-by: Alex Sierra
---
lib/test_hmm.c | 15 ++-
lib/test_hmm_uapi.h | 7 +++
2 files changed, 21 insertions(+), 1 deletion(-)
diff --git a/lib
claim it as MEMORY_DEVICE_GENERIC using
devm_memremap_pages.
Signed-off-by: Alex Sierra
---
kernel/resource.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/kernel/resource.c b/kernel/resource.c
index ca9f5198a01f..227fc9fab573 100644
--- a/kernel/resource.c
+++ b/kernel/resource.c
@@ -772,6
Device generic type case added for migrate_vma_pages and
migrate_vma_check_page helpers.
Both, generic and private device types have the same
conditions to decide to migrate pages from/to device
memory.
Signed-off-by: Alex Sierra
---
mm/migrate.c | 18 +++---
1 file changed, 11
Two helpers added. One checks if zone device page is generic
type. The other if page is either private or generic type.
Signed-off-by: Alex Sierra
---
include/linux/mm.h | 8
1 file changed, 8 insertions(+)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index d48a1f0889d1
migrate_ping_pong test case added to test explicit migration
from device to sys memory for both private and generic
zone types.
Helpers to migrate from device to sys memory and vicerversa
were also added.
Signed-off-by: Alex Sierra
---
tools/testing/selftests/vm/hmm-tests.c | 142
Add two more parameters to set spm_addr_dev0 & spm_addr_dev1
addresses. These two parameters configure the start SP
addresses for each device in test_hmm driver.
Consequently, this configures zone device type as generic.
Signed-off-by: Alex Sierra
---
tools/testing/selftests/vm/test_hmm.sh
ap.type = MEMORY_DEVICE_PRIVATE at
dmirror_allocate_chunk that was forcing to configure pagemap.type
to MEMORY_DEVICE_PRIVATE
v6:
Check for null pointers for resource and memremap references
at dmirror_allocate_chunk
Signed-off-by: Alex Sierra
---
lib/test_hmm.c | 56 ---
supports two different SP ranges
of at least 256MB size. This could be specified in the
kernel parameter variable efi_fake_mem. Ex. Two SP ranges
of 1GB starting at 0x1 & 0x14000 physical address.
efi_fake_mem=1G@0x1:0x4,1G@0x14000:0x4
Signed-off-by: Alex Si
Public device type memory on VRAM to RAM migration,
has similar access as System RAM from the CPU. This flag sets
the source from the sender. Which in Public type case,
should be set as IOMEM.
Signed-off-by: Alex Sierra
Reviewed-by: Felix Kuehling
---
drivers/gpu/drm/amd/amdkfd/kfd_migrate.c
Ref counter from device pages is init to zero during memmap init zone.
The first time a new device page is allocated to migrate data into it,
its ref counter needs to be initialized to one.
Signed-off-by: Alex Sierra
---
drivers/gpu/drm/amd/amdkfd/kfd_migrate.c | 2 +-
1 file changed, 1
supports two different SP ranges of at least
256MB size. This could be specified in the kernel parameter variable
efi_fake_mem. Ex. Two SP ranges of 1GB starting at 0x1 &
0x14000 physical address. Ex.
efi_fake_mem=1G@0x1:0x4,1G@0x14000:0x4
Signed-off-by: Alex Si
In order to configure device public in test_hmm, two module parameters
should be passed, which correspond to the SP start address of each
device (2) spm_addr_dev0 & spm_addr_dev1. If no parameters are passed,
private device type is configured.
Signed-off-by: Alex Sierra
---
v5:
Remove de
In this case, this is used to migrate pages from device memory, back to
system memory. This particular device memory type should be accessible
by the CPU, through IOMEM access. Typically, zone device public type
memory falls into this category.
Signed-off-by: Alex Sierra
---
include/linux
Add device public type case to migrate_vma_insert_page,
migrate_vma_pages and migrate_vma_check_page helpers.
Signed-off-by: Alex Sierra
---
mm/migrate.c | 19 ---
1 file changed, 12 insertions(+), 7 deletions(-)
diff --git a/mm/migrate.c b/mm/migrate.c
index d4ae2da99607
migrate_ping_pong test case added to test explicit migration
from device to sys memory for both private and public
zone types.
Helpers to migrate from device to sys memory and vicerversa
were also added.
Signed-off-by: Alex Sierra
---
tools/testing/selftests/vm/hmm-tests.c | 142
From: Ralph Campbell
There are several places where ZONE_DEVICE struct pages assume a reference
count == 1 means the page is idle and free. Instead of open coding this,
add a helper function to hide this detail.
Signed-off-by: Ralph Campbell
Signed-off-by: Alex Sierra
Reviewed-by: Christoph
.
Signed-off-by: Alex Sierra
Reviewed-by: Felix Kuehling
---
v7:
Remove lookup_resource call, so export symbol for this function
is not longer required. Patch dropped "kernel: resource:
lookup_resource as exported symbol"
---
drivers/gpu/drm/amd/amdkfd/kfd_migrate.c | 29 +++--
count doesn't need to
be treated specially for ZONE_DEVICE.
Signed-off-by: Ralph Campbell
Signed-off-by: Alex Sierra
---
v2:
AS: merged this patch in linux 5.11 version
v5:
AS: add condition at try_grab_page to check for the zone device type, while
page ref counter is checked less/equal to
-off-by: Alex Sierra
---
include/linux/memremap.h | 8
include/linux/mm.h | 8
mm/memcontrol.c | 6 +++---
mm/memory-failure.c | 6 +-
mm/memremap.c| 1 +
5 files changed, 25 insertions(+), 4 deletions(-)
diff --git a/include/linux/memremap.h b
new ioctl cmd added to query zone device type. This will be
used once the test_hmm adds zone device public type.
Signed-off-by: Alex Sierra
---
lib/test_hmm.c | 15 ++-
lib/test_hmm_uapi.h | 7 +++
2 files changed, 21 insertions(+), 1 deletion(-)
diff --git a/lib
previous
reviews of this patch series (see
https://patchwork.freedesktop.org/series/90706/).
Finally, we extended hmm_test to cover migration of MEMORY_DEVICE_PUBLIC.
This work is based on HMM and our SVM memory manager, which has landed
in Linux 5.14 recently.
Alex Sierra (12):
mm: add iomem
Add MEMORY_DEVICE_PUBLIC case to free_zone_device_page callback.
Device public type memory case is now able to free its pages properly.
Signed-off-by: Alex Sierra
---
mm/memremap.c | 9 +
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/mm/memremap.c b/mm/memremap.c
index
Add two more parameters to set spm_addr_dev0 & spm_addr_dev1
addresses. These two parameters configure the start SP
addresses for each device in test_hmm driver.
Consequently, this configures zone device type as public.
Signed-off-by: Alex Sierra
---
tools/testing/selftests/vm/test_hmm.sh
claim it as MEMORY_DEVICE_GENERIC using
devm_memremap_pages.
Signed-off-by: Alex Sierra
---
kernel/resource.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/resource.c b/kernel/resource.c
index 627e61b0c124..269489bb7097 100644
--- a/kernel/resource.c
+++ b/kernel
ZONE_DEVICE page refcounting patches.
Patches 4-5 are for context to show how we are looking up the SPM
memory and registering it with devmap.
Patches 3,6-8 are the changes we are trying to upstream or rework to
make them acceptable upstream.
Patches 9-13 add ZONE_DEVICE Generic type supp
Device generic type case added for migrate_vma_pages and
migrate_vma_check_page helpers.
Both, generic and private device types have the same
conditions to decide to migrate pages from/to device
memory.
Signed-off-by: Alex Sierra
---
mm/migrate.c | 20 +---
1 file changed, 9
count doesn't need to
be treated specially for ZONE_DEVICE.
v2:
AS: merged this patch in linux 5.11 version
Signed-off-by: Ralph Campbell
Signed-off-by: Alex Sierra
---
arch/powerpc/kvm/book3s_hv_uvmem.c | 2 +-
drivers/gpu/drm/nouveau/nouveau_dmem.c | 2 +-
fs/
ref count functionality was missing on fuse/dax.c.
Signed-off-by: Ralph Campbell
Signed-off-by: Alex Sierra
---
fs/dax.c| 4 ++--
fs/ext4/inode.c | 5 +
fs/fuse/dax.c | 4 +---
fs/xfs/xfs_file.c | 4 +---
include/linux/dax.h | 10 ++
5 files changed, 15
new ioctl cmd added to query zone device type. This will be
used once the test_hmm adds zone device generic type.
Signed-off-by: Alex Sierra
---
lib/test_hmm.c | 15 ++-
lib/test_hmm_uapi.h | 7 +++
2 files changed, 21 insertions(+), 1 deletion(-)
diff --git a/lib
.
Signed-off-by: Alex Sierra
Reviewed-by: Felix Kuehling
---
drivers/gpu/drm/amd/amdkfd/kfd_migrate.c | 17 -
1 file changed, 12 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c
b/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c
index 21b86c35a4f2
Generic device type memory on VRAM to RAM migration,
has similar access as System RAM from the CPU. This flag sets
the source from the sender. Which in Generic type case,
should be set as SYSTEM.
Signed-off-by: Alex Sierra
Reviewed-by: Felix Kuehling
---
drivers/gpu/drm/amd/amdkfd
Add MEMORY_DEVICE_GENERIC case to free_zone_device_page
callback.
Device generic type memory case is now able to free its
pages properly.
Signed-off-by: Alex Sierra
---
mm/memremap.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/mm/memremap.c b/mm/memremap.c
index
In order to configure device generic in test_hmm, two
module parameters should be passed, which correspon to the
SP start address of each device (2) spm_addr_dev0 &
spm_addr_dev1. If no parameters are passed, private device
type is configured.
Signed-off-by: Alex Sierra
---
lib/test_h
Two helpers added. One checks if zone device page is generic
type. The other if page is either private or generic type.
Signed-off-by: Alex Sierra
---
include/linux/mm.h | 8
1 file changed, 8 insertions(+)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index d8d79bb94be8
migrate_ping_pong test case added to test explicit migration
from device to sys memory for both private and generic
zone types.
Helpers to migrate from device to sys memory and vicerversa
were also added.
Signed-off-by: Alex Sierra
---
tools/testing/selftests/vm/hmm-tests.c | 142
supports two different SP ranges
of at least 256MB size. This could be specified in the
kernel parameter variable efi_fake_mem. Ex. Two SP ranges
of 1GB starting at 0x1 & 0x14000 physical address.
efi_fake_mem=1G@0x1:0x4,1G@0x14000:0x4
Signed-off-by: Alex Si
Add two more parameters to set spm_addr_dev0 & spm_addr_dev1
addresses. These two parameters configure the start SP
addresses for each device in test_hmm driver.
Consequently, this configures zone device type as generic.
Signed-off-by: Alex Sierra
---
tools/testing/selftests/vm/test_hmm.sh
est called hmm_cow_in_device, will test
pages marked as COW, allocated in device zone. Also, more
configurations were added into hmm_gup_test to test basic get
user pages and get user pages fast paths in device zone pages.
Alex Sierra (3):
mm: split vm_normal_pages for LRU and non-LRU handling
tools: ad
Test device pages with get_user_pages and get_user_pages_fast.
The motivation is to test device coherent type pages in the gup and
gup fast paths, after vm_normal_pages was split into LRU and non-LRU
handled.
Signed-off-by: Alex Sierra
Acked-by: Felix Kuehling
---
tools/testing/selftests/vm
are duplicated directly from device
memory.
Signed-off-by: Alex Sierra
Acked-by: Felix Kuehling
---
tools/testing/selftests/vm/hmm-tests.c | 80 ++
1 file changed, 80 insertions(+)
diff --git a/tools/testing/selftests/vm/hmm-tests.c
b/tools/testing/selftests/vm/hmm
, to allow callers to specify that they
expect to put pages on an LRU list.
Signed-off-by: Alex Sierra
Acked-by: Felix Kuehling
---
fs/proc/task_mmu.c | 12 ++--
include/linux/mm.h | 11 +++
mm/gup.c| 10 ++
mm/hmm.c| 2 +-
mm/huge_memory.c|
callers to specify that they
expect to put pages on an LRU list.
Signed-off-by: Alex Sierra
---
fs/proc/task_mmu.c | 12 +-
include/linux/mm.h | 53 -
mm/gup.c| 10 +
mm/hmm.c| 2 +-
mm/huge_memory.c|
From: Ralph Campbell
There are several places where ZONE_DEVICE struct pages assume a reference
count == 1 means the page is idle and free. Instead of open coding this,
add a helper function to hide this detail.
Signed-off-by: Ralph Campbell
Signed-off-by: Alex Sierra
Reviewed-by: Christoph
Minor changes:
Swap patch order 03 and 04.
Addings
Add VM_BUG_ON_PAGE(page_ref_count(page), page) to patch 'drm/amdkfd:
ref count init for device pages', to make sure page hasn't been used
Alex Sierra (10):
mm: add zone device public type memory support
mm: add device public vma
-off-by: Alex Sierra
---
include/linux/memremap.h | 8
include/linux/mm.h | 8
mm/memcontrol.c | 6 +++---
mm/memory-failure.c | 6 +-
mm/memremap.c| 2 ++
mm/migrate.c | 19 ---
6 files changed, 38 insertions
This case is used to migrate pages from device memory, back to system
memory. Device public type memory is cache coherent from device and CPU
point of view.
Signed-off-by: Alex Sierra
---
v2:
condition added when migrations from device public pages.
---
include/linux/migrate.h | 1 +
mm
.
Signed-off-by: Alex Sierra
Reviewed-by: Felix Kuehling
---
v7:
Remove lookup_resource call, so export symbol for this function
is not longer required. Patch dropped "kernel: resource:
lookup_resource as exported symbol"
---
drivers/gpu/drm/amd/amdkfd/kfd_migrate.c | 32 +++--
Ref counter from device pages is init to zero during memmap init zone.
The first time a new device page is allocated to migrate data into it,
its ref counter needs to be initialized to one.
Signed-off-by: Alex Sierra
---
drivers/gpu/drm/amd/amdkfd/kfd_migrate.c | 3 ++-
1 file changed, 2
Public device type memory on VRAM to RAM migration, has similar access
as System RAM from the CPU. This flag sets the source from the sender.
Which in Public type case, should be set as
MIGRATE_VMA_SELECT_DEVICE_PUBLIC.
Signed-off-by: Alex Sierra
Reviewed-by: Felix Kuehling
---
drivers/gpu/drm
count doesn't need to
be treated specially for ZONE_DEVICE.
Signed-off-by: Ralph Campbell
Signed-off-by: Alex Sierra
Reviewed-by: Christoph Hellwig
---
v2:
AS: merged this patch in linux 5.11 version
v5:
AS: add condition at try_grab_page to check for the zone device type, while
pag
migrate_ping_pong test case added to test explicit migration
from device to sys memory for both private and public
zone types.
Helpers to migrate from device to sys memory and vicerversa
were also added.
Signed-off-by: Alex Sierra
---
tools/testing/selftests/vm/hmm-tests.c | 142
new ioctl cmd added to query zone device type. This will be
used once the test_hmm adds zone device public type.
Signed-off-by: Alex Sierra
---
lib/test_hmm.c | 15 ++-
lib/test_hmm_uapi.h | 7 +++
2 files changed, 21 insertions(+), 1 deletion(-)
diff --git a/lib
In order to configure device public in test_hmm, two module parameters
should be passed, which correspond to the SP start address of each
device (2) spm_addr_dev0 & spm_addr_dev1. If no parameters are passed,
private device type is configured.
Signed-off-by: Alex Sierra
---
v5:
Remove de
Add two more parameters to set spm_addr_dev0 & spm_addr_dev1
addresses. These two parameters configure the start SP
addresses for each device in test_hmm driver.
Consequently, this configures zone device type as public.
Signed-off-by: Alex Sierra
---
tools/testing/selftests/vm/test_hmm.sh
supports two different SP ranges of at least
256MB size. This could be specified in the kernel parameter variable
efi_fake_mem. Ex. Two SP ranges of 1GB starting at 0x1 &
0x14000 physical address. Ex.
efi_fake_mem=1G@0x1:0x4,1G@0x14000:0x4
Signed-off-by: Alex Si
builds on HMM and our SVM memory manager already merged in 5.14.
We would like to complete review and merge this migration patchset for
5.16.
Alex Sierra (10):
mm: add zone device coherent type memory support
mm: add device coherent vma selection for memory migration
drm/amdkfd: ref count init
From: Ralph Campbell
There are several places where ZONE_DEVICE struct pages assume a reference
count == 1 means the page is idle and free. Instead of open coding this,
add a helper function to hide this detail.
Signed-off-by: Ralph Campbell
Signed-off-by: Alex Sierra
Reviewed-by: Christoph
count doesn't need to
be treated specially for ZONE_DEVICE.
Signed-off-by: Ralph Campbell
Signed-off-by: Alex Sierra
Reviewed-by: Christoph Hellwig
---
v2:
AS: merged this patch in linux 5.11 version
v5:
AS: add condition at try_grab_page to check for the zone device type, while
pag
This case is used to migrate pages from device memory, back to system
memory. Device coherent type memory is cache coherent from device and CPU
point of view.
Signed-off-by: Alex Sierra
---
v2:
condition added when migrations from device coherent pages.
---
include/linux/migrate.h | 1 +
mm
.
Signed-off-by: Alex Sierra
Reviewed-by: Felix Kuehling
---
v7:
Remove lookup_resource call, so export symbol for this function
is not longer required. Patch dropped "kernel: resource:
lookup_resource as exported symbol"
---
drivers/gpu/drm/amd/amdkfd/kfd_migrate.c | 32 +++--
-off-by: Alex Sierra
---
include/linux/memremap.h | 8
include/linux/mm.h | 8
mm/memcontrol.c | 6 +++---
mm/memory-failure.c | 6 +-
mm/memremap.c| 2 ++
mm/migrate.c | 19 ---
6 files changed, 38 insertions
Coherent device type memory on VRAM to RAM migration, has similar access
as System RAM from the CPU. This flag sets the source from the sender.
Which in Coherent type case, should be set as
MIGRATE_VMA_SELECT_DEVICE_COHERENT.
Signed-off-by: Alex Sierra
Reviewed-by: Felix Kuehling
---
drivers
new ioctl cmd added to query zone device type. This will be
used once the test_hmm adds zone device coherent type.
Signed-off-by: Alex Sierra
---
lib/test_hmm.c | 15 ++-
lib/test_hmm_uapi.h | 7 +++
2 files changed, 21 insertions(+), 1 deletion(-)
diff --git a/lib
In order to configure device coherent in test_hmm, two module parameters
should be passed, which correspond to the SP start address of each
device (2) spm_addr_dev0 & spm_addr_dev1. If no parameters are passed,
private device type is configured.
Signed-off-by: Alex Sierra
---
lib/test_h
Ref counter from device pages is init to zero during memmap init zone.
The first time a new device page is allocated to migrate data into it,
its ref counter needs to be initialized to one.
Signed-off-by: Alex Sierra
---
drivers/gpu/drm/amd/amdkfd/kfd_migrate.c | 3 ++-
1 file changed, 2
supports two different SP ranges of at least
256MB size. This could be specified in the kernel parameter variable
efi_fake_mem. Ex. Two SP ranges of 1GB starting at 0x1 &
0x14000 physical address. Ex.
efi_fake_mem=1G@0x1:0x4,1G@0x14000:0x4
Signed-off-by: Alex Si
Add two more parameters to set spm_addr_dev0 & spm_addr_dev1
addresses. These two parameters configure the start SP
addresses for each device in test_hmm driver.
Consequently, this configures zone device type as coherent.
Signed-off-by: Alex Sierra
---
tools/testing/selftests/vm/test_hm
migrate_ping_pong test case added to test explicit migration
from device to sys memory for both private and coherent zone
types.
Helpers to migrate from device to sys memory and vicerversa
were also added.
Signed-off-by: Alex Sierra
---
tools/testing/selftests/vm/hmm-tests.c | 137
count doesn't need to
be treated specially for ZONE_DEVICE.
Signed-off-by: Ralph Campbell
Signed-off-by: Alex Sierra
Reviewed-by: Christoph Hellwig
---
v2:
AS: merged this patch in linux 5.11 version
v5:
AS: add condition at try_grab_page to check for the zone device type, while
pag
This patch cleans up ZONE_DEVICE page refcounting. Quoting Matthew
Wilcox, "it removes a ton of cruft from every call to put_page()"
This work was originally done by Ralph Campbell and submitted as RFC.
As of today, it has been ack by Theodore Ts'o / Darrick J. Wong, and
reviewed by Christoph Hellw
From: Ralph Campbell
There are several places where ZONE_DEVICE struct pages assume a reference
count == 1 means the page is idle and free. Instead of open coding this,
add a helper function to hide this detail.
Signed-off-by: Ralph Campbell
Signed-off-by: Alex Sierra
Reviewed-by: Christoph
.
Signed-off-by: Alex Sierra
---
v4:
- use the same system entry path for coherent device pages at
migrate_vma_insert_page.
- Add coherent device type support for try_to_migrate /
try_to_migrate_one.
---
include/linux/memremap.h | 8 +++
include/linux/mm.h | 16 ++
mm/memcontrol.c
_migrate_one.
- Include number of coherent device pages successfully migrated back to
system at test_hmm. Made the proper changes to hmm-test to read/check
this number.
Alex Sierra (10):
mm: add zone device coherent type memory support
mm: add device coherent vma selection for memory
This case is used to migrate pages from device memory, back to system
memory. Device coherent type memory is cache coherent from device and CPU
point of view.
Signed-off-by: Alex Sierra
---
v2:
condition added when migrations from device coherent pages.
---
include/linux/migrate.h | 1 +
mm
new ioctl cmd added to query zone device type. This will be
used once the test_hmm adds zone device coherent type.
Signed-off-by: Alex Sierra
---
lib/test_hmm.c | 23 +--
lib/test_hmm_uapi.h | 8
2 files changed, 29 insertions(+), 2 deletions(-)
diff --git a
e easily accessed from user
space through /dev/hmm_mirror. Usually num_device 0 and 1
are for private, and 2 and 3 for coherent types. If no module
parameters are passed, two instances of private type device_mirror will
be created only.
Signed-off-by: Alex Sierra
---
v4:
Return number of coherent devi
.
Signed-off-by: Alex Sierra
Reviewed-by: Felix Kuehling
---
v7:
Remove lookup_resource call, so export symbol for this function
is not longer required. Patch dropped "kernel: resource:
lookup_resource as exported symbol"
---
drivers/gpu/drm/amd/amdkfd/kfd_migrate.c | 29 +++--
In order to configure device coherent in test_hmm, two module parameters
should be passed, which correspond to the SP start address of each
device (2) spm_addr_dev0 & spm_addr_dev1. If no parameters are passed,
private device type is configured.
Signed-off-by: Alex Sierra
---
lib/test_h
migrate_ping_pong test case
added to test explicit migration from device to sys memory for both
private and coherent zone types.
Helpers to migrate from device to sys memory and vicerversa
were also added.
Signed-off-by: Alex Sierra
---
v2:
Set FIXTURE_VARIANT to add multiple device types to the
Coherent device type memory on VRAM to RAM migration, has similar access
as System RAM from the CPU. This flag sets the source from the sender.
Which in Coherent type case, should be set as
MIGRATE_VMA_SELECT_DEVICE_COHERENT.
Signed-off-by: Alex Sierra
Reviewed-by: Felix Kuehling
---
drivers
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