Re: [PATCH v9 1/3] drm/buddy: Implement tracking clear page feature
On 01/04/2024 12:07, Paneer Selvam, Arunpravin wrote:
Hi Matthew,
On 3/28/2024 10:18 PM, Matthew Auld wrote:
On 28/03/2024 16:07, Paneer Selvam, Arunpravin wrote:
Hi Matthew,
On 3/26/2024 11:39 PM, Matthew Auld wrote:
On 18/03/2024 21:40, Arunpravin Paneer Selvam wrote:
- Add tracking clear page feature.
- Driver should enable the DRM_BUDDY_CLEARED flag if it
successfully clears the blocks in the free path. On the otherhand,
DRM buddy marks each block as cleared.
- Track the available cleared pages size
- If driver requests cleared memory we prefer cleared memory
but fallback to uncleared if we can't find the cleared blocks.
when driver requests uncleared memory we try to use uncleared but
fallback to cleared memory if necessary.
- When a block gets freed we clear it and mark the freed block as
cleared,
when there are buddies which are cleared as well we can merge them.
Otherwise, we prefer to keep the blocks as separated.
- Add a function to support defragmentation.
v1:
- Depends on the flag check DRM_BUDDY_CLEARED, enable the block as
cleared. Else, reset the clear flag for each block in the
list(Christian)
- For merging the 2 cleared blocks compare as below,
drm_buddy_is_clear(block) != drm_buddy_is_clear(buddy)(Christian)
- Defragment the memory beginning from min_order
till the required memory space is available.
v2: (Matthew)
- Add a wrapper drm_buddy_free_list_internal for the freeing of
blocks
operation within drm buddy.
- Write a macro block_incompatible() to allocate the required
blocks.
- Update the xe driver for the drm_buddy_free_list change in
arguments.
- add a warning if the two blocks are incompatible on
defragmentation
- call full defragmentation in the fini() function
- place a condition to test if min_order is equal to 0
- replace the list with safe_reverse() variant as we might
remove the block from the list.
v3:
- fix Gitlab user reported lockup issue.
- Keep DRM_BUDDY_HEADER_CLEAR define sorted(Matthew)
- modify to pass the root order instead max_order in fini()
function(Matthew)
- change bool 1 to true(Matthew)
- add check if min_block_size is power of 2(Matthew)
- modify the min_block_size datatype to u64(Matthew)
v4:
- rename the function drm_buddy_defrag with __force_merge.
- Include __force_merge directly in drm buddy file and remove
the defrag use in amdgpu driver.
- Remove list_empty() check(Matthew)
- Remove unnecessary space, headers and placement of new
variables(Matthew)
- Add a unit test case(Matthew)
Signed-off-by: Arunpravin Paneer Selvam
Signed-off-by: Matthew Auld
Suggested-by: Christian König
Suggested-by: Matthew Auld
---
drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c | 6 +-
drivers/gpu/drm/drm_buddy.c | 427
++
drivers/gpu/drm/i915/i915_ttm_buddy_manager.c | 6 +-
drivers/gpu/drm/tests/drm_buddy_test.c | 18 +-
drivers/gpu/drm/xe/xe_ttm_vram_mgr.c | 4 +-
include/drm/drm_buddy.h | 16 +-
6 files changed, 360 insertions(+), 117 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
index 8db880244324..c0c851409241 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
@@ -571,7 +571,7 @@ static int amdgpu_vram_mgr_new(struct
ttm_resource_manager *man,
return 0;
error_free_blocks:
- drm_buddy_free_list(mm, >blocks);
+ drm_buddy_free_list(mm, >blocks, 0);
mutex_unlock(>lock);
error_fini:
ttm_resource_fini(man, >base);
@@ -604,7 +604,7 @@ static void amdgpu_vram_mgr_del(struct
ttm_resource_manager *man,
amdgpu_vram_mgr_do_reserve(man);
- drm_buddy_free_list(mm, >blocks);
+ drm_buddy_free_list(mm, >blocks, 0);
mutex_unlock(>lock);
atomic64_sub(vis_usage, >vis_usage);
@@ -912,7 +912,7 @@ void amdgpu_vram_mgr_fini(struct amdgpu_device
*adev)
kfree(rsv);
list_for_each_entry_safe(rsv, temp, >reserved_pages,
blocks) {
- drm_buddy_free_list(>mm, >allocated);
+ drm_buddy_free_list(>mm, >allocated, 0);
kfree(rsv);
}
if (!adev->gmc.is_app_apu)
diff --git a/drivers/gpu/drm/drm_buddy.c b/drivers/gpu/drm/drm_buddy.c
index c4222b886db7..625a30a6b855 100644
--- a/drivers/gpu/drm/drm_buddy.c
+++ b/drivers/gpu/drm/drm_buddy.c
@@ -38,8 +38,8 @@ static void drm_block_free(struct drm_buddy *mm,
kmem_cache_free(slab_blocks, block);
}
-static void list_insert_sorted(struct drm_buddy *mm,
- struct drm_buddy_block *block)
+static void list_insert(struct drm_buddy *mm,
+ struct drm_buddy_block *block)
{
struct drm_buddy_block *node;
struct list_head *head;
@@ -57,6 +57,16 @@ static void list_insert_sorted(struct drm_buddy
*mm,
__list_add(>link,
Re: [PATCH v9 1/3] drm/buddy: Implement tracking clear page feature
Hi Matthew,
On 3/28/2024 10:18 PM, Matthew Auld wrote:
On 28/03/2024 16:07, Paneer Selvam, Arunpravin wrote:
Hi Matthew,
On 3/26/2024 11:39 PM, Matthew Auld wrote:
On 18/03/2024 21:40, Arunpravin Paneer Selvam wrote:
- Add tracking clear page feature.
- Driver should enable the DRM_BUDDY_CLEARED flag if it
successfully clears the blocks in the free path. On the otherhand,
DRM buddy marks each block as cleared.
- Track the available cleared pages size
- If driver requests cleared memory we prefer cleared memory
but fallback to uncleared if we can't find the cleared blocks.
when driver requests uncleared memory we try to use uncleared but
fallback to cleared memory if necessary.
- When a block gets freed we clear it and mark the freed block as
cleared,
when there are buddies which are cleared as well we can merge them.
Otherwise, we prefer to keep the blocks as separated.
- Add a function to support defragmentation.
v1:
- Depends on the flag check DRM_BUDDY_CLEARED, enable the block as
cleared. Else, reset the clear flag for each block in the
list(Christian)
- For merging the 2 cleared blocks compare as below,
drm_buddy_is_clear(block) != drm_buddy_is_clear(buddy)(Christian)
- Defragment the memory beginning from min_order
till the required memory space is available.
v2: (Matthew)
- Add a wrapper drm_buddy_free_list_internal for the freeing of
blocks
operation within drm buddy.
- Write a macro block_incompatible() to allocate the required
blocks.
- Update the xe driver for the drm_buddy_free_list change in
arguments.
- add a warning if the two blocks are incompatible on
defragmentation
- call full defragmentation in the fini() function
- place a condition to test if min_order is equal to 0
- replace the list with safe_reverse() variant as we might
remove the block from the list.
v3:
- fix Gitlab user reported lockup issue.
- Keep DRM_BUDDY_HEADER_CLEAR define sorted(Matthew)
- modify to pass the root order instead max_order in fini()
function(Matthew)
- change bool 1 to true(Matthew)
- add check if min_block_size is power of 2(Matthew)
- modify the min_block_size datatype to u64(Matthew)
v4:
- rename the function drm_buddy_defrag with __force_merge.
- Include __force_merge directly in drm buddy file and remove
the defrag use in amdgpu driver.
- Remove list_empty() check(Matthew)
- Remove unnecessary space, headers and placement of new
variables(Matthew)
- Add a unit test case(Matthew)
Signed-off-by: Arunpravin Paneer Selvam
Signed-off-by: Matthew Auld
Suggested-by: Christian König
Suggested-by: Matthew Auld
---
drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c | 6 +-
drivers/gpu/drm/drm_buddy.c | 427
++
drivers/gpu/drm/i915/i915_ttm_buddy_manager.c | 6 +-
drivers/gpu/drm/tests/drm_buddy_test.c | 18 +-
drivers/gpu/drm/xe/xe_ttm_vram_mgr.c | 4 +-
include/drm/drm_buddy.h | 16 +-
6 files changed, 360 insertions(+), 117 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
index 8db880244324..c0c851409241 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
@@ -571,7 +571,7 @@ static int amdgpu_vram_mgr_new(struct
ttm_resource_manager *man,
return 0;
error_free_blocks:
- drm_buddy_free_list(mm, >blocks);
+ drm_buddy_free_list(mm, >blocks, 0);
mutex_unlock(>lock);
error_fini:
ttm_resource_fini(man, >base);
@@ -604,7 +604,7 @@ static void amdgpu_vram_mgr_del(struct
ttm_resource_manager *man,
amdgpu_vram_mgr_do_reserve(man);
- drm_buddy_free_list(mm, >blocks);
+ drm_buddy_free_list(mm, >blocks, 0);
mutex_unlock(>lock);
atomic64_sub(vis_usage, >vis_usage);
@@ -912,7 +912,7 @@ void amdgpu_vram_mgr_fini(struct amdgpu_device
*adev)
kfree(rsv);
list_for_each_entry_safe(rsv, temp, >reserved_pages,
blocks) {
- drm_buddy_free_list(>mm, >allocated);
+ drm_buddy_free_list(>mm, >allocated, 0);
kfree(rsv);
}
if (!adev->gmc.is_app_apu)
diff --git a/drivers/gpu/drm/drm_buddy.c b/drivers/gpu/drm/drm_buddy.c
index c4222b886db7..625a30a6b855 100644
--- a/drivers/gpu/drm/drm_buddy.c
+++ b/drivers/gpu/drm/drm_buddy.c
@@ -38,8 +38,8 @@ static void drm_block_free(struct drm_buddy *mm,
kmem_cache_free(slab_blocks, block);
}
-static void list_insert_sorted(struct drm_buddy *mm,
- struct drm_buddy_block *block)
+static void list_insert(struct drm_buddy *mm,
+ struct drm_buddy_block *block)
{
struct drm_buddy_block *node;
struct list_head *head;
@@ -57,6 +57,16 @@ static void list_insert_sorted(struct drm_buddy
*mm,
__list_add(>link, node->link.prev, >link);
}
+static void
Re: [PATCH v9 1/3] drm/buddy: Implement tracking clear page feature
On 28/03/2024 16:07, Paneer Selvam, Arunpravin wrote:
Hi Matthew,
On 3/26/2024 11:39 PM, Matthew Auld wrote:
On 18/03/2024 21:40, Arunpravin Paneer Selvam wrote:
- Add tracking clear page feature.
- Driver should enable the DRM_BUDDY_CLEARED flag if it
successfully clears the blocks in the free path. On the otherhand,
DRM buddy marks each block as cleared.
- Track the available cleared pages size
- If driver requests cleared memory we prefer cleared memory
but fallback to uncleared if we can't find the cleared blocks.
when driver requests uncleared memory we try to use uncleared but
fallback to cleared memory if necessary.
- When a block gets freed we clear it and mark the freed block as
cleared,
when there are buddies which are cleared as well we can merge them.
Otherwise, we prefer to keep the blocks as separated.
- Add a function to support defragmentation.
v1:
- Depends on the flag check DRM_BUDDY_CLEARED, enable the block as
cleared. Else, reset the clear flag for each block in the
list(Christian)
- For merging the 2 cleared blocks compare as below,
drm_buddy_is_clear(block) != drm_buddy_is_clear(buddy)(Christian)
- Defragment the memory beginning from min_order
till the required memory space is available.
v2: (Matthew)
- Add a wrapper drm_buddy_free_list_internal for the freeing of
blocks
operation within drm buddy.
- Write a macro block_incompatible() to allocate the required blocks.
- Update the xe driver for the drm_buddy_free_list change in
arguments.
- add a warning if the two blocks are incompatible on
defragmentation
- call full defragmentation in the fini() function
- place a condition to test if min_order is equal to 0
- replace the list with safe_reverse() variant as we might
remove the block from the list.
v3:
- fix Gitlab user reported lockup issue.
- Keep DRM_BUDDY_HEADER_CLEAR define sorted(Matthew)
- modify to pass the root order instead max_order in fini()
function(Matthew)
- change bool 1 to true(Matthew)
- add check if min_block_size is power of 2(Matthew)
- modify the min_block_size datatype to u64(Matthew)
v4:
- rename the function drm_buddy_defrag with __force_merge.
- Include __force_merge directly in drm buddy file and remove
the defrag use in amdgpu driver.
- Remove list_empty() check(Matthew)
- Remove unnecessary space, headers and placement of new
variables(Matthew)
- Add a unit test case(Matthew)
Signed-off-by: Arunpravin Paneer Selvam
Signed-off-by: Matthew Auld
Suggested-by: Christian König
Suggested-by: Matthew Auld
---
drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c | 6 +-
drivers/gpu/drm/drm_buddy.c | 427 ++
drivers/gpu/drm/i915/i915_ttm_buddy_manager.c | 6 +-
drivers/gpu/drm/tests/drm_buddy_test.c | 18 +-
drivers/gpu/drm/xe/xe_ttm_vram_mgr.c | 4 +-
include/drm/drm_buddy.h | 16 +-
6 files changed, 360 insertions(+), 117 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
index 8db880244324..c0c851409241 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
@@ -571,7 +571,7 @@ static int amdgpu_vram_mgr_new(struct
ttm_resource_manager *man,
return 0;
error_free_blocks:
- drm_buddy_free_list(mm, >blocks);
+ drm_buddy_free_list(mm, >blocks, 0);
mutex_unlock(>lock);
error_fini:
ttm_resource_fini(man, >base);
@@ -604,7 +604,7 @@ static void amdgpu_vram_mgr_del(struct
ttm_resource_manager *man,
amdgpu_vram_mgr_do_reserve(man);
- drm_buddy_free_list(mm, >blocks);
+ drm_buddy_free_list(mm, >blocks, 0);
mutex_unlock(>lock);
atomic64_sub(vis_usage, >vis_usage);
@@ -912,7 +912,7 @@ void amdgpu_vram_mgr_fini(struct amdgpu_device
*adev)
kfree(rsv);
list_for_each_entry_safe(rsv, temp, >reserved_pages,
blocks) {
- drm_buddy_free_list(>mm, >allocated);
+ drm_buddy_free_list(>mm, >allocated, 0);
kfree(rsv);
}
if (!adev->gmc.is_app_apu)
diff --git a/drivers/gpu/drm/drm_buddy.c b/drivers/gpu/drm/drm_buddy.c
index c4222b886db7..625a30a6b855 100644
--- a/drivers/gpu/drm/drm_buddy.c
+++ b/drivers/gpu/drm/drm_buddy.c
@@ -38,8 +38,8 @@ static void drm_block_free(struct drm_buddy *mm,
kmem_cache_free(slab_blocks, block);
}
-static void list_insert_sorted(struct drm_buddy *mm,
- struct drm_buddy_block *block)
+static void list_insert(struct drm_buddy *mm,
+ struct drm_buddy_block *block)
{
struct drm_buddy_block *node;
struct list_head *head;
@@ -57,6 +57,16 @@ static void list_insert_sorted(struct drm_buddy *mm,
__list_add(>link, node->link.prev, >link);
}
+static void clear_reset(struct drm_buddy_block *block)
+{
+ block->header &=
Re: [PATCH v9 1/3] drm/buddy: Implement tracking clear page feature
Hi Matthew,
On 3/26/2024 11:39 PM, Matthew Auld wrote:
On 18/03/2024 21:40, Arunpravin Paneer Selvam wrote:
- Add tracking clear page feature.
- Driver should enable the DRM_BUDDY_CLEARED flag if it
successfully clears the blocks in the free path. On the otherhand,
DRM buddy marks each block as cleared.
- Track the available cleared pages size
- If driver requests cleared memory we prefer cleared memory
but fallback to uncleared if we can't find the cleared blocks.
when driver requests uncleared memory we try to use uncleared but
fallback to cleared memory if necessary.
- When a block gets freed we clear it and mark the freed block as
cleared,
when there are buddies which are cleared as well we can merge them.
Otherwise, we prefer to keep the blocks as separated.
- Add a function to support defragmentation.
v1:
- Depends on the flag check DRM_BUDDY_CLEARED, enable the block as
cleared. Else, reset the clear flag for each block in the
list(Christian)
- For merging the 2 cleared blocks compare as below,
drm_buddy_is_clear(block) != drm_buddy_is_clear(buddy)(Christian)
- Defragment the memory beginning from min_order
till the required memory space is available.
v2: (Matthew)
- Add a wrapper drm_buddy_free_list_internal for the freeing of
blocks
operation within drm buddy.
- Write a macro block_incompatible() to allocate the required blocks.
- Update the xe driver for the drm_buddy_free_list change in
arguments.
- add a warning if the two blocks are incompatible on
defragmentation
- call full defragmentation in the fini() function
- place a condition to test if min_order is equal to 0
- replace the list with safe_reverse() variant as we might
remove the block from the list.
v3:
- fix Gitlab user reported lockup issue.
- Keep DRM_BUDDY_HEADER_CLEAR define sorted(Matthew)
- modify to pass the root order instead max_order in fini()
function(Matthew)
- change bool 1 to true(Matthew)
- add check if min_block_size is power of 2(Matthew)
- modify the min_block_size datatype to u64(Matthew)
v4:
- rename the function drm_buddy_defrag with __force_merge.
- Include __force_merge directly in drm buddy file and remove
the defrag use in amdgpu driver.
- Remove list_empty() check(Matthew)
- Remove unnecessary space, headers and placement of new
variables(Matthew)
- Add a unit test case(Matthew)
Signed-off-by: Arunpravin Paneer Selvam
Signed-off-by: Matthew Auld
Suggested-by: Christian König
Suggested-by: Matthew Auld
---
drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c | 6 +-
drivers/gpu/drm/drm_buddy.c | 427 ++
drivers/gpu/drm/i915/i915_ttm_buddy_manager.c | 6 +-
drivers/gpu/drm/tests/drm_buddy_test.c | 18 +-
drivers/gpu/drm/xe/xe_ttm_vram_mgr.c | 4 +-
include/drm/drm_buddy.h | 16 +-
6 files changed, 360 insertions(+), 117 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
index 8db880244324..c0c851409241 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
@@ -571,7 +571,7 @@ static int amdgpu_vram_mgr_new(struct
ttm_resource_manager *man,
return 0;
error_free_blocks:
- drm_buddy_free_list(mm, >blocks);
+ drm_buddy_free_list(mm, >blocks, 0);
mutex_unlock(>lock);
error_fini:
ttm_resource_fini(man, >base);
@@ -604,7 +604,7 @@ static void amdgpu_vram_mgr_del(struct
ttm_resource_manager *man,
amdgpu_vram_mgr_do_reserve(man);
- drm_buddy_free_list(mm, >blocks);
+ drm_buddy_free_list(mm, >blocks, 0);
mutex_unlock(>lock);
atomic64_sub(vis_usage, >vis_usage);
@@ -912,7 +912,7 @@ void amdgpu_vram_mgr_fini(struct amdgpu_device
*adev)
kfree(rsv);
list_for_each_entry_safe(rsv, temp, >reserved_pages,
blocks) {
- drm_buddy_free_list(>mm, >allocated);
+ drm_buddy_free_list(>mm, >allocated, 0);
kfree(rsv);
}
if (!adev->gmc.is_app_apu)
diff --git a/drivers/gpu/drm/drm_buddy.c b/drivers/gpu/drm/drm_buddy.c
index c4222b886db7..625a30a6b855 100644
--- a/drivers/gpu/drm/drm_buddy.c
+++ b/drivers/gpu/drm/drm_buddy.c
@@ -38,8 +38,8 @@ static void drm_block_free(struct drm_buddy *mm,
kmem_cache_free(slab_blocks, block);
}
-static void list_insert_sorted(struct drm_buddy *mm,
- struct drm_buddy_block *block)
+static void list_insert(struct drm_buddy *mm,
+ struct drm_buddy_block *block)
{
struct drm_buddy_block *node;
struct list_head *head;
@@ -57,6 +57,16 @@ static void list_insert_sorted(struct drm_buddy *mm,
__list_add(>link, node->link.prev, >link);
}
+static void clear_reset(struct drm_buddy_block *block)
+{
+ block->header &= ~DRM_BUDDY_HEADER_CLEAR;
+}
+
+static void mark_cleared(struct
Re: [PATCH v9 1/3] drm/buddy: Implement tracking clear page feature
On 18/03/2024 21:40, Arunpravin Paneer Selvam wrote:
- Add tracking clear page feature.
- Driver should enable the DRM_BUDDY_CLEARED flag if it
successfully clears the blocks in the free path. On the otherhand,
DRM buddy marks each block as cleared.
- Track the available cleared pages size
- If driver requests cleared memory we prefer cleared memory
but fallback to uncleared if we can't find the cleared blocks.
when driver requests uncleared memory we try to use uncleared but
fallback to cleared memory if necessary.
- When a block gets freed we clear it and mark the freed block as cleared,
when there are buddies which are cleared as well we can merge them.
Otherwise, we prefer to keep the blocks as separated.
- Add a function to support defragmentation.
v1:
- Depends on the flag check DRM_BUDDY_CLEARED, enable the block as
cleared. Else, reset the clear flag for each block in the list(Christian)
- For merging the 2 cleared blocks compare as below,
drm_buddy_is_clear(block) != drm_buddy_is_clear(buddy)(Christian)
- Defragment the memory beginning from min_order
till the required memory space is available.
v2: (Matthew)
- Add a wrapper drm_buddy_free_list_internal for the freeing of blocks
operation within drm buddy.
- Write a macro block_incompatible() to allocate the required blocks.
- Update the xe driver for the drm_buddy_free_list change in arguments.
- add a warning if the two blocks are incompatible on
defragmentation
- call full defragmentation in the fini() function
- place a condition to test if min_order is equal to 0
- replace the list with safe_reverse() variant as we might
remove the block from the list.
v3:
- fix Gitlab user reported lockup issue.
- Keep DRM_BUDDY_HEADER_CLEAR define sorted(Matthew)
- modify to pass the root order instead max_order in fini()
function(Matthew)
- change bool 1 to true(Matthew)
- add check if min_block_size is power of 2(Matthew)
- modify the min_block_size datatype to u64(Matthew)
v4:
- rename the function drm_buddy_defrag with __force_merge.
- Include __force_merge directly in drm buddy file and remove
the defrag use in amdgpu driver.
- Remove list_empty() check(Matthew)
- Remove unnecessary space, headers and placement of new variables(Matthew)
- Add a unit test case(Matthew)
Signed-off-by: Arunpravin Paneer Selvam
Signed-off-by: Matthew Auld
Suggested-by: Christian König
Suggested-by: Matthew Auld
---
drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c | 6 +-
drivers/gpu/drm/drm_buddy.c | 427 ++
drivers/gpu/drm/i915/i915_ttm_buddy_manager.c | 6 +-
drivers/gpu/drm/tests/drm_buddy_test.c| 18 +-
drivers/gpu/drm/xe/xe_ttm_vram_mgr.c | 4 +-
include/drm/drm_buddy.h | 16 +-
6 files changed, 360 insertions(+), 117 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
index 8db880244324..c0c851409241 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
@@ -571,7 +571,7 @@ static int amdgpu_vram_mgr_new(struct ttm_resource_manager
*man,
return 0;
error_free_blocks:
- drm_buddy_free_list(mm, >blocks);
+ drm_buddy_free_list(mm, >blocks, 0);
mutex_unlock(>lock);
error_fini:
ttm_resource_fini(man, >base);
@@ -604,7 +604,7 @@ static void amdgpu_vram_mgr_del(struct ttm_resource_manager
*man,
amdgpu_vram_mgr_do_reserve(man);
- drm_buddy_free_list(mm, >blocks);
+ drm_buddy_free_list(mm, >blocks, 0);
mutex_unlock(>lock);
atomic64_sub(vis_usage, >vis_usage);
@@ -912,7 +912,7 @@ void amdgpu_vram_mgr_fini(struct amdgpu_device *adev)
kfree(rsv);
list_for_each_entry_safe(rsv, temp, >reserved_pages, blocks) {
- drm_buddy_free_list(>mm, >allocated);
+ drm_buddy_free_list(>mm, >allocated, 0);
kfree(rsv);
}
if (!adev->gmc.is_app_apu)
diff --git a/drivers/gpu/drm/drm_buddy.c b/drivers/gpu/drm/drm_buddy.c
index c4222b886db7..625a30a6b855 100644
--- a/drivers/gpu/drm/drm_buddy.c
+++ b/drivers/gpu/drm/drm_buddy.c
@@ -38,8 +38,8 @@ static void drm_block_free(struct drm_buddy *mm,
kmem_cache_free(slab_blocks, block);
}
-static void list_insert_sorted(struct drm_buddy *mm,
- struct drm_buddy_block *block)
+static void list_insert(struct drm_buddy *mm,
+ struct drm_buddy_block *block)
{
struct drm_buddy_block *node;
struct list_head *head;
@@ -57,6 +57,16 @@ static void list_insert_sorted(struct drm_buddy *mm,
__list_add(>link, node->link.prev, >link);
}
+static void clear_reset(struct drm_buddy_block *block)
+{
+ block->header &= ~DRM_BUDDY_HEADER_CLEAR;
+}
+
+static void
Re: [PATCH v9 1/3] drm/buddy: Implement tracking clear page feature
Hi Matthew,
ping?
Thanks,
Arun.
On 3/19/2024 3:10 AM, Arunpravin Paneer Selvam wrote:
- Add tracking clear page feature.
- Driver should enable the DRM_BUDDY_CLEARED flag if it
successfully clears the blocks in the free path. On the otherhand,
DRM buddy marks each block as cleared.
- Track the available cleared pages size
- If driver requests cleared memory we prefer cleared memory
but fallback to uncleared if we can't find the cleared blocks.
when driver requests uncleared memory we try to use uncleared but
fallback to cleared memory if necessary.
- When a block gets freed we clear it and mark the freed block as cleared,
when there are buddies which are cleared as well we can merge them.
Otherwise, we prefer to keep the blocks as separated.
- Add a function to support defragmentation.
v1:
- Depends on the flag check DRM_BUDDY_CLEARED, enable the block as
cleared. Else, reset the clear flag for each block in the list(Christian)
- For merging the 2 cleared blocks compare as below,
drm_buddy_is_clear(block) != drm_buddy_is_clear(buddy)(Christian)
- Defragment the memory beginning from min_order
till the required memory space is available.
v2: (Matthew)
- Add a wrapper drm_buddy_free_list_internal for the freeing of blocks
operation within drm buddy.
- Write a macro block_incompatible() to allocate the required blocks.
- Update the xe driver for the drm_buddy_free_list change in arguments.
- add a warning if the two blocks are incompatible on
defragmentation
- call full defragmentation in the fini() function
- place a condition to test if min_order is equal to 0
- replace the list with safe_reverse() variant as we might
remove the block from the list.
v3:
- fix Gitlab user reported lockup issue.
- Keep DRM_BUDDY_HEADER_CLEAR define sorted(Matthew)
- modify to pass the root order instead max_order in fini()
function(Matthew)
- change bool 1 to true(Matthew)
- add check if min_block_size is power of 2(Matthew)
- modify the min_block_size datatype to u64(Matthew)
v4:
- rename the function drm_buddy_defrag with __force_merge.
- Include __force_merge directly in drm buddy file and remove
the defrag use in amdgpu driver.
- Remove list_empty() check(Matthew)
- Remove unnecessary space, headers and placement of new variables(Matthew)
- Add a unit test case(Matthew)
Signed-off-by: Arunpravin Paneer Selvam
Signed-off-by: Matthew Auld
Suggested-by: Christian König
Suggested-by: Matthew Auld
---
drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c | 6 +-
drivers/gpu/drm/drm_buddy.c | 427 ++
drivers/gpu/drm/i915/i915_ttm_buddy_manager.c | 6 +-
drivers/gpu/drm/tests/drm_buddy_test.c| 18 +-
drivers/gpu/drm/xe/xe_ttm_vram_mgr.c | 4 +-
include/drm/drm_buddy.h | 16 +-
6 files changed, 360 insertions(+), 117 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
index 8db880244324..c0c851409241 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
@@ -571,7 +571,7 @@ static int amdgpu_vram_mgr_new(struct ttm_resource_manager
*man,
return 0;
error_free_blocks:
- drm_buddy_free_list(mm, >blocks);
+ drm_buddy_free_list(mm, >blocks, 0);
mutex_unlock(>lock);
error_fini:
ttm_resource_fini(man, >base);
@@ -604,7 +604,7 @@ static void amdgpu_vram_mgr_del(struct ttm_resource_manager
*man,
amdgpu_vram_mgr_do_reserve(man);
- drm_buddy_free_list(mm, >blocks);
+ drm_buddy_free_list(mm, >blocks, 0);
mutex_unlock(>lock);
atomic64_sub(vis_usage, >vis_usage);
@@ -912,7 +912,7 @@ void amdgpu_vram_mgr_fini(struct amdgpu_device *adev)
kfree(rsv);
list_for_each_entry_safe(rsv, temp, >reserved_pages, blocks) {
- drm_buddy_free_list(>mm, >allocated);
+ drm_buddy_free_list(>mm, >allocated, 0);
kfree(rsv);
}
if (!adev->gmc.is_app_apu)
diff --git a/drivers/gpu/drm/drm_buddy.c b/drivers/gpu/drm/drm_buddy.c
index c4222b886db7..625a30a6b855 100644
--- a/drivers/gpu/drm/drm_buddy.c
+++ b/drivers/gpu/drm/drm_buddy.c
@@ -38,8 +38,8 @@ static void drm_block_free(struct drm_buddy *mm,
kmem_cache_free(slab_blocks, block);
}
-static void list_insert_sorted(struct drm_buddy *mm,
- struct drm_buddy_block *block)
+static void list_insert(struct drm_buddy *mm,
+ struct drm_buddy_block *block)
{
struct drm_buddy_block *node;
struct list_head *head;
@@ -57,6 +57,16 @@ static void list_insert_sorted(struct drm_buddy *mm,
__list_add(>link, node->link.prev, >link);
}
+static void clear_reset(struct drm_buddy_block *block)
+{
+ block->header &= ~DRM_BUDDY_HEADER_CLEAR;
+}
