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| author | Keith Busch <kbusch@kernel.org> | 2025-04-25 20:06:34 -0600 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2025-05-20 05:34:27 +0200 |
| commit | 1c9a93bf1d01729c54e9acbaa538db81f16563b2 (patch) | |
| tree | 7cba687e7c24600f9c3b28fcc1427bedebf37bb7 /mm/dmapool.c | |
| parent | 0164d1350a651fd208a8c7138443dc4af82e0fa5 (diff) | |
| download | linux-1c9a93bf1d01729c54e9acbaa538db81f16563b2.tar.gz | |
dmapool: add NUMA affinity support
Introduce dma_pool_create_node(), like dma_pool_create() but taking an
additional NUMA node argument. Allocate struct dma_pool on the desired
node, and store the node on dma_pool for allocating struct dma_page.
Make dma_pool_create() an alias for dma_pool_create_node() with node set
to NUMA_NO_NODE.
Signed-off-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Caleb Sander Mateos <csander@purestorage.com>
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Kanchan Joshi <joshi.k@samsung.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'mm/dmapool.c')
| -rw-r--r-- | mm/dmapool.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/mm/dmapool.c b/mm/dmapool.c index f0bfc6c490f4e1..5be8cc1c652922 100644 --- a/mm/dmapool.c +++ b/mm/dmapool.c @@ -56,6 +56,7 @@ struct dma_pool { /* the pool */ unsigned int size; unsigned int allocation; unsigned int boundary; + int node; char name[32]; struct list_head pools; }; @@ -199,12 +200,13 @@ static void pool_block_push(struct dma_pool *pool, struct dma_block *block, /** - * dma_pool_create - Creates a pool of consistent memory blocks, for dma. + * dma_pool_create_node - Creates a pool of consistent memory blocks, for dma. * @name: name of pool, for diagnostics * @dev: device that will be doing the DMA * @size: size of the blocks in this pool. * @align: alignment requirement for blocks; must be a power of two * @boundary: returned blocks won't cross this power of two boundary + * @node: optional NUMA node to allocate structs 'dma_pool' and 'dma_page' on * Context: not in_interrupt() * * Given one of these pools, dma_pool_alloc() @@ -221,8 +223,8 @@ static void pool_block_push(struct dma_pool *pool, struct dma_block *block, * Return: a dma allocation pool with the requested characteristics, or * %NULL if one can't be created. */ -struct dma_pool *dma_pool_create(const char *name, struct device *dev, - size_t size, size_t align, size_t boundary) +struct dma_pool *dma_pool_create_node(const char *name, struct device *dev, + size_t size, size_t align, size_t boundary, int node) { struct dma_pool *retval; size_t allocation; @@ -251,7 +253,7 @@ struct dma_pool *dma_pool_create(const char *name, struct device *dev, boundary = min(boundary, allocation); - retval = kzalloc(sizeof(*retval), GFP_KERNEL); + retval = kzalloc_node(sizeof(*retval), GFP_KERNEL, node); if (!retval) return retval; @@ -264,6 +266,7 @@ struct dma_pool *dma_pool_create(const char *name, struct device *dev, retval->size = size; retval->boundary = boundary; retval->allocation = allocation; + retval->node = node; INIT_LIST_HEAD(&retval->pools); /* @@ -295,7 +298,7 @@ struct dma_pool *dma_pool_create(const char *name, struct device *dev, mutex_unlock(&pools_reg_lock); return retval; } -EXPORT_SYMBOL(dma_pool_create); +EXPORT_SYMBOL(dma_pool_create_node); static void pool_initialise_page(struct dma_pool *pool, struct dma_page *page) { @@ -335,7 +338,7 @@ static struct dma_page *pool_alloc_page(struct dma_pool *pool, gfp_t mem_flags) { struct dma_page *page; - page = kmalloc(sizeof(*page), mem_flags); + page = kmalloc_node(sizeof(*page), mem_flags, pool->node); if (!page) return NULL; |