linux-kernel - [PATCH 4/4] iommu/dma, numa: Use NUMA aware memory allocations in __iommu_dma_alloc

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Date:   Thu, 21 Sep 2017 14:29:22 +0530
From:   Ganapatrao Kulkarni <ganapatrao.kulkarni@...ium.com>
To:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        iommu@...ts.linux-foundation.org, linux-mm@...ck.org
Cc:     Will.Deacon@....com, robin.murphy@....com,
        lorenzo.pieralisi@....com, hanjun.guo@...aro.org, joro@...tes.org,
        vbabka@...e.cz, akpm@...ux-foundation.org, mhocko@...e.com,
        Tomasz.Nowicki@...ium.com, Robert.Richter@...ium.com,
        jnair@...iumnetworks.com, gklkml16@...il.com
Subject: [PATCH 4/4] iommu/dma, numa: Use NUMA aware memory allocations in __iommu_dma_alloc_pages

Change function __iommu_dma_alloc_pages to allocate memory/pages
for dma from respective device numa node.

Signed-off-by: Ganapatrao Kulkarni <ganapatrao.kulkarni@...ium.com>
---
 drivers/iommu/dma-iommu.c | 17 ++++++++++-------
 1 file changed, 10 insertions(+), 7 deletions(-)

diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c
index 9d1cebe..0626b58 100644
--- a/drivers/iommu/dma-iommu.c
+++ b/drivers/iommu/dma-iommu.c
@@ -428,20 +428,21 @@ static void __iommu_dma_free_pages(struct page **pages, int count)
 	kvfree(pages);
 }
 
-static struct page **__iommu_dma_alloc_pages(unsigned int count,
-		unsigned long order_mask, gfp_t gfp)
+static struct page **__iommu_dma_alloc_pages(struct device *dev,
+		unsigned int count, unsigned long order_mask, gfp_t gfp)
 {
 	struct page **pages;
 	unsigned int i = 0, array_size = count * sizeof(*pages);
+	int numa_node = dev_to_node(dev);
 
 	order_mask &= (2U << MAX_ORDER) - 1;
 	if (!order_mask)
 		return NULL;
 
 	if (array_size <= PAGE_SIZE)
-		pages = kzalloc(array_size, GFP_KERNEL);
+		pages = kzalloc_node(array_size, GFP_KERNEL, numa_node);
 	else
-		pages = vzalloc(array_size);
+		pages = vzalloc_node(array_size, numa_node);
 	if (!pages)
 		return NULL;
 
@@ -462,8 +463,9 @@ static struct page **__iommu_dma_alloc_pages(unsigned int count,
 			unsigned int order = __fls(order_mask);
 
 			order_size = 1U << order;
-			page = alloc_pages((order_mask - order_size) ?
-					   gfp | __GFP_NORETRY : gfp, order);
+			page = alloc_pages_node(numa_node,
+					(order_mask - order_size) ?
+				   gfp | __GFP_NORETRY : gfp, order);
 			if (!page)
 				continue;
 			if (!order)
@@ -548,7 +550,8 @@ struct page **iommu_dma_alloc(struct device *dev, size_t size, gfp_t gfp,
 		alloc_sizes = min_size;
 
 	count = PAGE_ALIGN(size) >> PAGE_SHIFT;
-	pages = __iommu_dma_alloc_pages(count, alloc_sizes >> PAGE_SHIFT, gfp);
+	pages = __iommu_dma_alloc_pages(dev, count, alloc_sizes >> PAGE_SHIFT,
+			gfp);
 	if (!pages)
 		return NULL;
 
-- 
2.9.4