[PATCH 1/5] drm/ttm: add page order in page pool

[PATCH 1/5] drm/ttm: add page order in page pool

[Roger He]

to indicate page order for each element in the pool

Change-Id: Ic609925ca5d2a5d4ad49d6becf505388ce3624cf
Signed-off-by: Roger He <Hongbo.He@amd.com>
---
 drivers/gpu/drm/ttm/ttm_page_alloc.c | 42 ++++++++++++++++++++++++++----------
 1 file changed, 31 insertions(+), 11 deletions(-)

diff --git a/drivers/gpu/drm/ttm/ttm_page_alloc.c b/drivers/gpu/drm/ttm/ttm_page_alloc.c
index 7385785..2db551f 100644
--- a/drivers/gpu/drm/ttm/ttm_page_alloc.c
+++ b/drivers/gpu/drm/ttm/ttm_page_alloc.c
@@ -84,6 +84,7 @@ struct ttm_page_pool {
 	char			*name;
 	unsigned long		nfrees;
 	unsigned long		nrefills;
+	unsigned int		order;
 };
 
 /**
@@ -415,6 +416,7 @@ ttm_pool_shrink_scan(struct shrinker *shrink, struct shrink_control *sc)
 	struct ttm_page_pool *pool;
 	int shrink_pages = sc->nr_to_scan;
 	unsigned long freed = 0;
+	unsigned int nr_free_pool;
 
 	if (!mutex_trylock(&lock))
 		return SHRINK_STOP;
@@ -424,10 +426,15 @@ ttm_pool_shrink_scan(struct shrinker *shrink, struct shrink_control *sc)
 		unsigned nr_free = shrink_pages;
 		if (shrink_pages == 0)
 			break;
+
 		pool = &_manager->pools[(i + pool_offset)%NUM_POOLS];
 		/* OK to use static buffer since global mutex is held. */
-		shrink_pages = ttm_page_pool_free(pool, nr_free, true);
-		freed += nr_free - shrink_pages;
+		nr_free_pool = (nr_free >> pool->order);
+		if (nr_free_pool == 0)
+			continue;
+
+		shrink_pages = ttm_page_pool_free(pool, nr_free_pool, true);
+		freed += ((nr_free_pool - shrink_pages) << pool->order);
 	}
 	mutex_unlock(&lock);
 	return freed;
@@ -439,9 +446,12 @@ ttm_pool_shrink_count(struct shrinker *shrink, struct shrink_control *sc)
 {
 	unsigned i;
 	unsigned long count = 0;
+	struct ttm_page_pool *pool;
 
-	for (i = 0; i < NUM_POOLS; ++i)
-		count += _manager->pools[i].npages;
+	for (i = 0; i < NUM_POOLS; ++i) {
+		pool = &_manager->pools[i];
+		count += (pool->npages << pool->order);
+	}
 
 	return count;
 }
@@ -935,7 +945,7 @@ static int ttm_get_pages(struct page **pages, unsigned npages, int flags,
 }
 
 static void ttm_page_pool_init_locked(struct ttm_page_pool *pool, gfp_t flags,
-		char *name)
+		char *name, unsigned int order)
 {
 	spin_lock_init(&pool->lock);
 	pool->fill_lock = false;
@@ -943,8 +953,18 @@ static void ttm_page_pool_init_locked(struct ttm_page_pool *pool, gfp_t flags,
 	pool->npages = pool->nfrees = 0;
 	pool->gfp_flags = flags;
 	pool->name = name;
+	pool->order = order;
 }
 
+/**
+ * Actually if TRANSPARENT_HUGEPAGE not enabled, we will not use
+ * wc_pool_huge and uc_pool_huge, so no matter whatever the page
+ * order are for those two pools
+ */
+#ifndef CONFIG_TRANSPARENT_HUGEPAGE
+#define	HPAGE_PMD_ORDER	9
+#endif
+
 int ttm_page_alloc_init(struct ttm_mem_global *glob, unsigned max_pages)
 {
 	int ret;
@@ -955,23 +975,23 @@ int ttm_page_alloc_init(struct ttm_mem_global *glob, unsigned max_pages)
 
 	_manager = kzalloc(sizeof(*_manager), GFP_KERNEL);
 
-	ttm_page_pool_init_locked(&_manager->wc_pool, GFP_HIGHUSER, "wc");
+	ttm_page_pool_init_locked(&_manager->wc_pool, GFP_HIGHUSER, "wc", 0);
 
-	ttm_page_pool_init_locked(&_manager->uc_pool, GFP_HIGHUSER, "uc");
+	ttm_page_pool_init_locked(&_manager->uc_pool, GFP_HIGHUSER, "uc", 0);
 
 	ttm_page_pool_init_locked(&_manager->wc_pool_dma32,
-				  GFP_USER | GFP_DMA32, "wc dma");
+				  GFP_USER | GFP_DMA32, "wc dma", 0);
 
 	ttm_page_pool_init_locked(&_manager->uc_pool_dma32,
-				  GFP_USER | GFP_DMA32, "uc dma");
+				  GFP_USER | GFP_DMA32, "uc dma", 0);
 
 	ttm_page_pool_init_locked(&_manager->wc_pool_huge,
 				  GFP_TRANSHUGE	& ~(__GFP_MOVABLE | __GFP_COMP),
-				  "wc huge");
+				  "wc huge", HPAGE_PMD_ORDER);
 
 	ttm_page_pool_init_locked(&_manager->uc_pool_huge,
 				  GFP_TRANSHUGE	& ~(__GFP_MOVABLE | __GFP_COMP)
-				  , "uc huge");
+				  , "uc huge", HPAGE_PMD_ORDER);
 
 	_manager->options.max_size = max_pages;
 	_manager->options.small = SMALL_ALLOCATION;
-- 
2.7.4

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[PATCH 2/5] drm/ttm: add set_pages_wb for handling page order more than zero

[Roger He]

Change-Id: Idf5ccb579d264b343199d8b8344bddeec2c0019f
Signed-off-by: Roger He <Hongbo.He@amd.com>
---
 drivers/gpu/drm/ttm/ttm_page_alloc.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/gpu/drm/ttm/ttm_page_alloc.c b/drivers/gpu/drm/ttm/ttm_page_alloc.c
index 2db551f..fabb082 100644
--- a/drivers/gpu/drm/ttm/ttm_page_alloc.c
+++ b/drivers/gpu/drm/ttm/ttm_page_alloc.c
@@ -226,6 +226,17 @@ static struct kobj_type ttm_pool_kobj_type = {
 static struct ttm_pool_manager *_manager;
 
 #ifndef CONFIG_X86
+static int set_pages_wb(struct page *page, int numpages)
+{
+#if IS_ENABLED(CONFIG_AGP)
+	int i;
+
+	for (i = 0; i < numpages; i++)
+		unmap_page_from_agp(page++);
+#endif
+	return 0;
+}
+
 static int set_pages_array_wb(struct page **pages, int addrinarray)
 {
 #if IS_ENABLED(CONFIG_AGP)
-- 
2.7.4

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[PATCH 3/5] drm/ttm: add page order support in ttm_pages_put

[Roger He]

Change-Id: Ia55b206d95812c5afcfd6cec29f580758d1f50f0
Signed-off-by: Roger He <Hongbo.He@amd.com>
---
 drivers/gpu/drm/ttm/ttm_page_alloc.c | 19 +++++++++++--------
 1 file changed, 11 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/ttm/ttm_page_alloc.c b/drivers/gpu/drm/ttm/ttm_page_alloc.c
index fabb082..343db0b 100644
--- a/drivers/gpu/drm/ttm/ttm_page_alloc.c
+++ b/drivers/gpu/drm/ttm/ttm_page_alloc.c
@@ -299,13 +299,16 @@ static struct ttm_page_pool *ttm_get_pool(int flags, bool huge,
 }
 
 /* set memory back to wb and free the pages. */
-static void ttm_pages_put(struct page *pages[], unsigned npages)
+static void ttm_pages_put(struct page *pages[], unsigned npages,
+		unsigned int order)
 {
-	unsigned i;
-	if (set_pages_array_wb(pages, npages))
-		pr_err("Failed to set %d pages to wb!\n", npages);
-	for (i = 0; i < npages; ++i)
-		__free_page(pages[i]);
+	unsigned int i, pages_nr = (1 << order);
+
+	for (i = 0; i < npages; ++i) {
+		if (set_pages_wb(pages[i], pages_nr))
+			pr_err("Failed to set %d pages to wb!\n", pages_nr);
+		__free_pages(pages[i], order);
+	}
 }
 
 static void ttm_pool_update_free_locked(struct ttm_page_pool *pool,
@@ -368,7 +371,7 @@ static int ttm_page_pool_free(struct ttm_page_pool *pool, unsigned nr_free,
 			 */
 			spin_unlock_irqrestore(&pool->lock, irq_flags);
 
-			ttm_pages_put(pages_to_free, freed_pages);
+			ttm_pages_put(pages_to_free, freed_pages, pool->order);
 			if (likely(nr_free != FREE_ALL_PAGES))
 				nr_free -= freed_pages;
 
@@ -403,7 +406,7 @@ static int ttm_page_pool_free(struct ttm_page_pool *pool, unsigned nr_free,
 	spin_unlock_irqrestore(&pool->lock, irq_flags);
 
 	if (freed_pages)
-		ttm_pages_put(pages_to_free, freed_pages);
+		ttm_pages_put(pages_to_free, freed_pages, pool->order);
 out:
 	if (pages_to_free != static_buf)
 		kfree(pages_to_free);
-- 
2.7.4

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[PATCH 4/5] drm/ttm: free one in huge pool even shrink request less than one element

[Roger He]

Change-Id: Id8bd4d1ecff9f3ab14355e2dbd1c59b9fe824e01
Signed-off-by: Roger He <Hongbo.He@amd.com>
---
 drivers/gpu/drm/ttm/ttm_page_alloc.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/ttm/ttm_page_alloc.c b/drivers/gpu/drm/ttm/ttm_page_alloc.c
index 343db0b..82d40c6 100644
--- a/drivers/gpu/drm/ttm/ttm_page_alloc.c
+++ b/drivers/gpu/drm/ttm/ttm_page_alloc.c
@@ -444,11 +444,13 @@ ttm_pool_shrink_scan(struct shrinker *shrink, struct shrink_control *sc)
 		pool = &_manager->pools[(i + pool_offset)%NUM_POOLS];
 		/* OK to use static buffer since global mutex is held. */
 		nr_free_pool = (nr_free >> pool->order);
-		if (nr_free_pool == 0)
-			continue;
+		if (!nr_free_pool && pool->order)
+			nr_free_pool = 1;
 
 		shrink_pages = ttm_page_pool_free(pool, nr_free_pool, true);
 		freed += ((nr_free_pool - shrink_pages) << pool->order);
+		if (freed >= sc->nr_to_scan)
+			break;
 	}
 	mutex_unlock(&lock);
 	return freed;
-- 
2.7.4

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[PATCH 5/5] drm/ttm: delete set_pages_array_wb since no one use it anymore

[Roger He]

Change-Id: I9fa45af447c3c78d0b7b2b8958081e584c560120
Signed-off-by: Roger He <Hongbo.He@amd.com>
---
 drivers/gpu/drm/ttm/ttm_page_alloc.c | 11 -----------
 1 file changed, 11 deletions(-)

diff --git a/drivers/gpu/drm/ttm/ttm_page_alloc.c b/drivers/gpu/drm/ttm/ttm_page_alloc.c
index 82d40c6..53fd8e9 100644
--- a/drivers/gpu/drm/ttm/ttm_page_alloc.c
+++ b/drivers/gpu/drm/ttm/ttm_page_alloc.c
@@ -237,17 +237,6 @@ static int set_pages_wb(struct page *page, int numpages)
 	return 0;
 }
 
-static int set_pages_array_wb(struct page **pages, int addrinarray)
-{
-#if IS_ENABLED(CONFIG_AGP)
-	int i;
-
-	for (i = 0; i < addrinarray; i++)
-		unmap_page_from_agp(pages[i]);
-#endif
-	return 0;
-}
-
 static int set_pages_array_wc(struct page **pages, int addrinarray)
 {
 #if IS_ENABLED(CONFIG_AGP)
-- 
2.7.4

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[PATCH 1/5] drm/ttm: add page order in page pool

[Roger He]

to indicate page order for each element in the pool

Change-Id: Ic609925ca5d2a5d4ad49d6becf505388ce3624cf
Signed-off-by: Roger He <Hongbo.He@amd.com>
---
 drivers/gpu/drm/ttm/ttm_page_alloc.c | 38 +++++++++++++++++++++++++-----------
 1 file changed, 27 insertions(+), 11 deletions(-)

diff --git a/drivers/gpu/drm/ttm/ttm_page_alloc.c b/drivers/gpu/drm/ttm/ttm_page_alloc.c
index 7385785..a02bd65 100644
--- a/drivers/gpu/drm/ttm/ttm_page_alloc.c
+++ b/drivers/gpu/drm/ttm/ttm_page_alloc.c
@@ -84,6 +84,7 @@ struct ttm_page_pool {
 	char			*name;
 	unsigned long		nfrees;
 	unsigned long		nrefills;
+	unsigned int		order;
 };
 
 /**
@@ -415,6 +416,7 @@ ttm_pool_shrink_scan(struct shrinker *shrink, struct shrink_control *sc)
 	struct ttm_page_pool *pool;
 	int shrink_pages = sc->nr_to_scan;
 	unsigned long freed = 0;
+	unsigned int nr_free_pool;
 
 	if (!mutex_trylock(&lock))
 		return SHRINK_STOP;
@@ -424,10 +426,15 @@ ttm_pool_shrink_scan(struct shrinker *shrink, struct shrink_control *sc)
 		unsigned nr_free = shrink_pages;
 		if (shrink_pages == 0)
 			break;
+
 		pool = &_manager->pools[(i + pool_offset)%NUM_POOLS];
 		/* OK to use static buffer since global mutex is held. */
-		shrink_pages = ttm_page_pool_free(pool, nr_free, true);
-		freed += nr_free - shrink_pages;
+		nr_free_pool = (nr_free >> pool->order);
+		if (nr_free_pool == 0)
+			continue;
+
+		shrink_pages = ttm_page_pool_free(pool, nr_free_pool, true);
+		freed += ((nr_free_pool - shrink_pages) << pool->order);
 	}
 	mutex_unlock(&lock);
 	return freed;
@@ -439,9 +446,12 @@ ttm_pool_shrink_count(struct shrinker *shrink, struct shrink_control *sc)
 {
 	unsigned i;
 	unsigned long count = 0;
+	struct ttm_page_pool *pool;
 
-	for (i = 0; i < NUM_POOLS; ++i)
-		count += _manager->pools[i].npages;
+	for (i = 0; i < NUM_POOLS; ++i) {
+		pool = &_manager->pools[i];
+		count += (pool->npages << pool->order);
+	}
 
 	return count;
 }
@@ -935,7 +945,7 @@ static int ttm_get_pages(struct page **pages, unsigned npages, int flags,
 }
 
 static void ttm_page_pool_init_locked(struct ttm_page_pool *pool, gfp_t flags,
-		char *name)
+		char *name, unsigned int order)
 {
 	spin_lock_init(&pool->lock);
 	pool->fill_lock = false;
@@ -943,11 +953,17 @@ static void ttm_page_pool_init_locked(struct ttm_page_pool *pool, gfp_t flags,
 	pool->npages = pool->nfrees = 0;
 	pool->gfp_flags = flags;
 	pool->name = name;
+	pool->order = order;
 }
 
 int ttm_page_alloc_init(struct ttm_mem_global *glob, unsigned max_pages)
 {
 	int ret;
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+	unsigned order = HPAGE_PMD_ORDER;
+#else
+	unsigned order = 0;
+#endif
 
 	WARN_ON(_manager);
 
@@ -955,23 +971,23 @@ int ttm_page_alloc_init(struct ttm_mem_global *glob, unsigned max_pages)
 
 	_manager = kzalloc(sizeof(*_manager), GFP_KERNEL);
 
-	ttm_page_pool_init_locked(&_manager->wc_pool, GFP_HIGHUSER, "wc");
+	ttm_page_pool_init_locked(&_manager->wc_pool, GFP_HIGHUSER, "wc", 0);
 
-	ttm_page_pool_init_locked(&_manager->uc_pool, GFP_HIGHUSER, "uc");
+	ttm_page_pool_init_locked(&_manager->uc_pool, GFP_HIGHUSER, "uc", 0);
 
 	ttm_page_pool_init_locked(&_manager->wc_pool_dma32,
-				  GFP_USER | GFP_DMA32, "wc dma");
+				  GFP_USER | GFP_DMA32, "wc dma", 0);
 
 	ttm_page_pool_init_locked(&_manager->uc_pool_dma32,
-				  GFP_USER | GFP_DMA32, "uc dma");
+				  GFP_USER | GFP_DMA32, "uc dma", 0);
 
 	ttm_page_pool_init_locked(&_manager->wc_pool_huge,
 				  GFP_TRANSHUGE	& ~(__GFP_MOVABLE | __GFP_COMP),
-				  "wc huge");
+				  "wc huge", order);
 
 	ttm_page_pool_init_locked(&_manager->uc_pool_huge,
 				  GFP_TRANSHUGE	& ~(__GFP_MOVABLE | __GFP_COMP)
-				  , "uc huge");
+				  , "uc huge", order);
 
 	_manager->options.max_size = max_pages;
 	_manager->options.small = SMALL_ALLOCATION;
-- 
2.7.4

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Re: [PATCH 1/5] drm/ttm: add page order in page pool

[Christian König]

Am 22.11.2017 um 10:17 schrieb Roger He:
> to indicate page order for each element in the pool
>
> Change-Id: Ic609925ca5d2a5d4ad49d6becf505388ce3624cf
> Signed-off-by: Roger He <Hongbo.He@amd.com>

Reviewed-by: Christian König <christian.koenig@amd.com> for this one.

Feel free to commit it preliminary, but I think we still need to work on 
the rest.

Regards,
Christian.

> ---
>   drivers/gpu/drm/ttm/ttm_page_alloc.c | 38 +++++++++++++++++++++++++-----------
>   1 file changed, 27 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/gpu/drm/ttm/ttm_page_alloc.c b/drivers/gpu/drm/ttm/ttm_page_alloc.c
> index 7385785..a02bd65 100644
> --- a/drivers/gpu/drm/ttm/ttm_page_alloc.c
> +++ b/drivers/gpu/drm/ttm/ttm_page_alloc.c
> @@ -84,6 +84,7 @@ struct ttm_page_pool {
>   	char			*name;
>   	unsigned long		nfrees;
>   	unsigned long		nrefills;
> +	unsigned int		order;
>   };
>   
>   /**
> @@ -415,6 +416,7 @@ ttm_pool_shrink_scan(struct shrinker *shrink, struct shrink_control *sc)
>   	struct ttm_page_pool *pool;
>   	int shrink_pages = sc->nr_to_scan;
>   	unsigned long freed = 0;
> +	unsigned int nr_free_pool;
>   
>   	if (!mutex_trylock(&lock))
>   		return SHRINK_STOP;
> @@ -424,10 +426,15 @@ ttm_pool_shrink_scan(struct shrinker *shrink, struct shrink_control *sc)
>   		unsigned nr_free = shrink_pages;
>   		if (shrink_pages == 0)
>   			break;
> +
>   		pool = &_manager->pools[(i + pool_offset)%NUM_POOLS];
>   		/* OK to use static buffer since global mutex is held. */
> -		shrink_pages = ttm_page_pool_free(pool, nr_free, true);
> -		freed += nr_free - shrink_pages;
> +		nr_free_pool = (nr_free >> pool->order);
> +		if (nr_free_pool == 0)
> +			continue;
> +
> +		shrink_pages = ttm_page_pool_free(pool, nr_free_pool, true);
> +		freed += ((nr_free_pool - shrink_pages) << pool->order);
>   	}
>   	mutex_unlock(&lock);
>   	return freed;
> @@ -439,9 +446,12 @@ ttm_pool_shrink_count(struct shrinker *shrink, struct shrink_control *sc)
>   {
>   	unsigned i;
>   	unsigned long count = 0;
> +	struct ttm_page_pool *pool;
>   
> -	for (i = 0; i < NUM_POOLS; ++i)
> -		count += _manager->pools[i].npages;
> +	for (i = 0; i < NUM_POOLS; ++i) {
> +		pool = &_manager->pools[i];
> +		count += (pool->npages << pool->order);
> +	}
>   
>   	return count;
>   }
> @@ -935,7 +945,7 @@ static int ttm_get_pages(struct page **pages, unsigned npages, int flags,
>   }
>   
>   static void ttm_page_pool_init_locked(struct ttm_page_pool *pool, gfp_t flags,
> -		char *name)
> +		char *name, unsigned int order)
>   {
>   	spin_lock_init(&pool->lock);
>   	pool->fill_lock = false;
> @@ -943,11 +953,17 @@ static void ttm_page_pool_init_locked(struct ttm_page_pool *pool, gfp_t flags,
>   	pool->npages = pool->nfrees = 0;
>   	pool->gfp_flags = flags;
>   	pool->name = name;
> +	pool->order = order;
>   }
>   
>   int ttm_page_alloc_init(struct ttm_mem_global *glob, unsigned max_pages)
>   {
>   	int ret;
> +#ifdef CONFIG_TRANSPARENT_HUGEPAGE
> +	unsigned order = HPAGE_PMD_ORDER;
> +#else
> +	unsigned order = 0;
> +#endif
>   
>   	WARN_ON(_manager);
>   
> @@ -955,23 +971,23 @@ int ttm_page_alloc_init(struct ttm_mem_global *glob, unsigned max_pages)
>   
>   	_manager = kzalloc(sizeof(*_manager), GFP_KERNEL);
>   
> -	ttm_page_pool_init_locked(&_manager->wc_pool, GFP_HIGHUSER, "wc");
> +	ttm_page_pool_init_locked(&_manager->wc_pool, GFP_HIGHUSER, "wc", 0);
>   
> -	ttm_page_pool_init_locked(&_manager->uc_pool, GFP_HIGHUSER, "uc");
> +	ttm_page_pool_init_locked(&_manager->uc_pool, GFP_HIGHUSER, "uc", 0);
>   
>   	ttm_page_pool_init_locked(&_manager->wc_pool_dma32,
> -				  GFP_USER | GFP_DMA32, "wc dma");
> +				  GFP_USER | GFP_DMA32, "wc dma", 0);
>   
>   	ttm_page_pool_init_locked(&_manager->uc_pool_dma32,
> -				  GFP_USER | GFP_DMA32, "uc dma");
> +				  GFP_USER | GFP_DMA32, "uc dma", 0);
>   
>   	ttm_page_pool_init_locked(&_manager->wc_pool_huge,
>   				  GFP_TRANSHUGE	& ~(__GFP_MOVABLE | __GFP_COMP),
> -				  "wc huge");
> +				  "wc huge", order);
>   
>   	ttm_page_pool_init_locked(&_manager->uc_pool_huge,
>   				  GFP_TRANSHUGE	& ~(__GFP_MOVABLE | __GFP_COMP)
> -				  , "uc huge");
> +				  , "uc huge", order);
>   
>   	_manager->options.max_size = max_pages;
>   	_manager->options.small = SMALL_ALLOCATION;


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Re: [PATCH 1/5] drm/ttm: add page order in page pool

[Chunming Zhou]

the patch set looks ok to me, Reviewed-by: Chunming Zhou 
<david1.zhou@amd.com>


On 2017年11月22日 17:17, Roger He wrote:
> to indicate page order for each element in the pool
>
> Change-Id: Ic609925ca5d2a5d4ad49d6becf505388ce3624cf
> Signed-off-by: Roger He <Hongbo.He@amd.com>
> ---
>   drivers/gpu/drm/ttm/ttm_page_alloc.c | 38 +++++++++++++++++++++++++-----------
>   1 file changed, 27 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/gpu/drm/ttm/ttm_page_alloc.c b/drivers/gpu/drm/ttm/ttm_page_alloc.c
> index 7385785..a02bd65 100644
> --- a/drivers/gpu/drm/ttm/ttm_page_alloc.c
> +++ b/drivers/gpu/drm/ttm/ttm_page_alloc.c
> @@ -84,6 +84,7 @@ struct ttm_page_pool {
>   	char			*name;
>   	unsigned long		nfrees;
>   	unsigned long		nrefills;
> +	unsigned int		order;
>   };
>   
>   /**
> @@ -415,6 +416,7 @@ ttm_pool_shrink_scan(struct shrinker *shrink, struct shrink_control *sc)
>   	struct ttm_page_pool *pool;
>   	int shrink_pages = sc->nr_to_scan;
>   	unsigned long freed = 0;
> +	unsigned int nr_free_pool;
>   
>   	if (!mutex_trylock(&lock))
>   		return SHRINK_STOP;
> @@ -424,10 +426,15 @@ ttm_pool_shrink_scan(struct shrinker *shrink, struct shrink_control *sc)
>   		unsigned nr_free = shrink_pages;
>   		if (shrink_pages == 0)
>   			break;
> +
>   		pool = &_manager->pools[(i + pool_offset)%NUM_POOLS];
>   		/* OK to use static buffer since global mutex is held. */
> -		shrink_pages = ttm_page_pool_free(pool, nr_free, true);
> -		freed += nr_free - shrink_pages;
> +		nr_free_pool = (nr_free >> pool->order);
> +		if (nr_free_pool == 0)
> +			continue;
> +
> +		shrink_pages = ttm_page_pool_free(pool, nr_free_pool, true);
> +		freed += ((nr_free_pool - shrink_pages) << pool->order);
>   	}
>   	mutex_unlock(&lock);
>   	return freed;
> @@ -439,9 +446,12 @@ ttm_pool_shrink_count(struct shrinker *shrink, struct shrink_control *sc)
>   {
>   	unsigned i;
>   	unsigned long count = 0;
> +	struct ttm_page_pool *pool;
>   
> -	for (i = 0; i < NUM_POOLS; ++i)
> -		count += _manager->pools[i].npages;
> +	for (i = 0; i < NUM_POOLS; ++i) {
> +		pool = &_manager->pools[i];
> +		count += (pool->npages << pool->order);
> +	}
>   
>   	return count;
>   }
> @@ -935,7 +945,7 @@ static int ttm_get_pages(struct page **pages, unsigned npages, int flags,
>   }
>   
>   static void ttm_page_pool_init_locked(struct ttm_page_pool *pool, gfp_t flags,
> -		char *name)
> +		char *name, unsigned int order)
>   {
>   	spin_lock_init(&pool->lock);
>   	pool->fill_lock = false;
> @@ -943,11 +953,17 @@ static void ttm_page_pool_init_locked(struct ttm_page_pool *pool, gfp_t flags,
>   	pool->npages = pool->nfrees = 0;
>   	pool->gfp_flags = flags;
>   	pool->name = name;
> +	pool->order = order;
>   }
>   
>   int ttm_page_alloc_init(struct ttm_mem_global *glob, unsigned max_pages)
>   {
>   	int ret;
> +#ifdef CONFIG_TRANSPARENT_HUGEPAGE
> +	unsigned order = HPAGE_PMD_ORDER;
> +#else
> +	unsigned order = 0;
> +#endif
>   
>   	WARN_ON(_manager);
>   
> @@ -955,23 +971,23 @@ int ttm_page_alloc_init(struct ttm_mem_global *glob, unsigned max_pages)
>   
>   	_manager = kzalloc(sizeof(*_manager), GFP_KERNEL);
>   
> -	ttm_page_pool_init_locked(&_manager->wc_pool, GFP_HIGHUSER, "wc");
> +	ttm_page_pool_init_locked(&_manager->wc_pool, GFP_HIGHUSER, "wc", 0);
>   
> -	ttm_page_pool_init_locked(&_manager->uc_pool, GFP_HIGHUSER, "uc");
> +	ttm_page_pool_init_locked(&_manager->uc_pool, GFP_HIGHUSER, "uc", 0);
>   
>   	ttm_page_pool_init_locked(&_manager->wc_pool_dma32,
> -				  GFP_USER | GFP_DMA32, "wc dma");
> +				  GFP_USER | GFP_DMA32, "wc dma", 0);
>   
>   	ttm_page_pool_init_locked(&_manager->uc_pool_dma32,
> -				  GFP_USER | GFP_DMA32, "uc dma");
> +				  GFP_USER | GFP_DMA32, "uc dma", 0);
>   
>   	ttm_page_pool_init_locked(&_manager->wc_pool_huge,
>   				  GFP_TRANSHUGE	& ~(__GFP_MOVABLE | __GFP_COMP),
> -				  "wc huge");
> +				  "wc huge", order);
>   
>   	ttm_page_pool_init_locked(&_manager->uc_pool_huge,
>   				  GFP_TRANSHUGE	& ~(__GFP_MOVABLE | __GFP_COMP)
> -				  , "uc huge");
> +				  , "uc huge", order);
>   
>   	_manager->options.max_size = max_pages;
>   	_manager->options.small = SMALL_ALLOCATION;

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Re: [PATCH 1/5] drm/ttm: add page order in page pool

[kbuild test robot]

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Hi Roger,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on drm/drm-next]
[also build test WARNING on next-20171122]
[cannot apply to v4.14]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Roger-He/drm-ttm-add-page-order-in-page-pool/20171124-035121
base:   git://people.freedesktop.org/~airlied/linux.git drm-next
config: i386-randconfig-x008-201747 (attached as .config)
compiler: gcc-6 (Debian 6.4.0-9) 6.4.0 20171026
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/ttm/ttm_page_alloc.c:963:0: warning: "HPAGE_PMD_ORDER" redefined
    #define HPAGE_PMD_ORDER 9
    
   In file included from include/linux/mm.h:451:0,
                    from include/linux/highmem.h:7,
                    from drivers/gpu/drm/ttm/ttm_page_alloc.c:38:
   include/linux/huge_mm.h:78:0: note: this is the location of the previous definition
    #define HPAGE_PMD_ORDER (HPAGE_PMD_SHIFT-PAGE_SHIFT)
    
   In file included from include/uapi/linux/stddef.h:1:0,
                    from include/linux/stddef.h:4,
                    from include/uapi/linux/posix_types.h:4,
                    from include/uapi/linux/types.h:13,
                    from include/linux/types.h:5,
                    from include/linux/list.h:4,
                    from drivers/gpu/drm/ttm/ttm_page_alloc.c:36:
   include/linux/compiler.h:162:4: warning: '______f' is static but declared in inline function 'strcpy' which is not static
       ______f = {     \
       ^
   include/linux/compiler.h:154:23: note: in expansion of macro '__trace_if'
    #define if(cond, ...) __trace_if( (cond , ## __VA_ARGS__) )
                          ^~~~~~~~~~
   include/linux/string.h:421:2: note: in expansion of macro 'if'
     if (p_size == (size_t)-1 && q_size == (size_t)-1)
     ^~
   include/linux/compiler.h:162:4: warning: '______f' is static but declared in inline function 'kmemdup' which is not static
       ______f = {     \
       ^
   include/linux/compiler.h:154:23: note: in expansion of macro '__trace_if'
    #define if(cond, ...) __trace_if( (cond , ## __VA_ARGS__) )
                          ^~~~~~~~~~
   include/linux/string.h:411:2: note: in expansion of macro 'if'
     if (p_size < size)
     ^~
   include/linux/compiler.h:162:4: warning: '______f' is static but declared in inline function 'kmemdup' which is not static
       ______f = {     \
       ^
   include/linux/compiler.h:154:23: note: in expansion of macro '__trace_if'
    #define if(cond, ...) __trace_if( (cond , ## __VA_ARGS__) )
                          ^~~~~~~~~~
   include/linux/string.h:409:2: note: in expansion of macro 'if'
     if (__builtin_constant_p(size) && p_size < size)
     ^~
   include/linux/compiler.h:162:4: warning: '______f' is static but declared in inline function 'memchr_inv' which is not static
       ______f = {     \
       ^
   include/linux/compiler.h:154:23: note: in expansion of macro '__trace_if'
    #define if(cond, ...) __trace_if( (cond , ## __VA_ARGS__) )
                          ^~~~~~~~~~
   include/linux/string.h:400:2: note: in expansion of macro 'if'
     if (p_size < size)
     ^~
   include/linux/compiler.h:162:4: warning: '______f' is static but declared in inline function 'memchr_inv' which is not static
       ______f = {     \
       ^
   include/linux/compiler.h:154:23: note: in expansion of macro '__trace_if'
    #define if(cond, ...) __trace_if( (cond , ## __VA_ARGS__) )
                          ^~~~~~~~~~
   include/linux/string.h:398:2: note: in expansion of macro 'if'
     if (__builtin_constant_p(size) && p_size < size)
     ^~
   include/linux/compiler.h:162:4: warning: '______f' is static but declared in inline function 'memchr' which is not static
       ______f = {     \
       ^
   include/linux/compiler.h:154:23: note: in expansion of macro '__trace_if'
    #define if(cond, ...) __trace_if( (cond , ## __VA_ARGS__) )
                          ^~~~~~~~~~
   include/linux/string.h:389:2: note: in expansion of macro 'if'
     if (p_size < size)
     ^~
   include/linux/compiler.h:162:4: warning: '______f' is static but declared in inline function 'memchr' which is not static
       ______f = {     \
       ^
   include/linux/compiler.h:154:23: note: in expansion of macro '__trace_if'
    #define if(cond, ...) __trace_if( (cond , ## __VA_ARGS__) )
                          ^~~~~~~~~~
   include/linux/string.h:387:2: note: in expansion of macro 'if'
     if (__builtin_constant_p(size) && p_size < size)
     ^~
   include/linux/compiler.h:162:4: warning: '______f' is static but declared in inline function 'memcmp' which is not static
       ______f = {     \
       ^
   include/linux/compiler.h:154:23: note: in expansion of macro '__trace_if'
    #define if(cond, ...) __trace_if( (cond , ## __VA_ARGS__) )
                          ^~~~~~~~~~
   include/linux/string.h:379:2: note: in expansion of macro 'if'
     if (p_size < size || q_size < size)
     ^~
   include/linux/compiler.h:162:4: warning: '______f' is static but declared in inline function 'memcmp' which is not static
       ______f = {     \
       ^
   include/linux/compiler.h:154:23: note: in expansion of macro '__trace_if'
    #define if(cond, ...) __trace_if( (cond , ## __VA_ARGS__) )
                          ^~~~~~~~~~
   include/linux/string.h:376:3: note: in expansion of macro 'if'
      if (q_size < size)
      ^~
   include/linux/compiler.h:162:4: warning: '______f' is static but declared in inline function 'memcmp' which is not static
       ______f = {     \
       ^
   include/linux/compiler.h:154:23: note: in expansion of macro '__trace_if'

vim +/HPAGE_PMD_ORDER +963 drivers/gpu/drm/ttm/ttm_page_alloc.c

   956	
   957	/**
   958	 * Actually if TRANSPARENT_HUGEPAGE not enabled, we will not use
   959	 * wc_pool_huge and uc_pool_huge, so no matter whatever the page
   960	 * order are for those two pools
   961	 */
   962	#ifndef CONFIG_TRANSPARENT_HUGEPAGE
 > 963	#define	HPAGE_PMD_ORDER	9
   964	#endif
   965	

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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