From ce234d838d3b0566bcbf3fd13b546f176564ca07 Mon Sep 17 00:00:00 2001 From: Israel Rukshin Date: Mon, 24 Nov 2025 08:49:20 +0200 Subject: [PATCH] nvmet-rdma: use kvcalloc for commands and responses arrays Replace kcalloc with kvcalloc for allocation of the commands and responses arrays. Each command structure is 272 bytes and each response structure is 672 bytes. These arrays typically exceed a single page, and grow much larger with high queue depths (e.g., commands >2MB, responses >170KB) kvcalloc automatically falls back to vmalloc for large or fragmented allocations, improving reliability. In our case, this memory is not aimed for DMA operations and could be safely allocated by kvcalloc. Using virtually contiguous memory helps to avoid allocation failures and out-of-memory conditions common with kcalloc on large pools. Signed-off-by: Israel Rukshin Reviewed-by: Max Gurtovoy Reviewed-by: Christoph Hellwig Signed-off-by: Keith Busch --- drivers/nvme/target/rdma.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/drivers/nvme/target/rdma.c b/drivers/nvme/target/rdma.c index 0485e25ab797c..9c12b2361a6d7 100644 --- a/drivers/nvme/target/rdma.c +++ b/drivers/nvme/target/rdma.c @@ -367,7 +367,7 @@ nvmet_rdma_alloc_cmds(struct nvmet_rdma_device *ndev, struct nvmet_rdma_cmd *cmds; int ret = -EINVAL, i; - cmds = kcalloc(nr_cmds, sizeof(struct nvmet_rdma_cmd), GFP_KERNEL); + cmds = kvcalloc(nr_cmds, sizeof(struct nvmet_rdma_cmd), GFP_KERNEL); if (!cmds) goto out; @@ -382,7 +382,7 @@ nvmet_rdma_alloc_cmds(struct nvmet_rdma_device *ndev, out_free: while (--i >= 0) nvmet_rdma_free_cmd(ndev, cmds + i, admin); - kfree(cmds); + kvfree(cmds); out: return ERR_PTR(ret); } @@ -394,7 +394,7 @@ static void nvmet_rdma_free_cmds(struct nvmet_rdma_device *ndev, for (i = 0; i < nr_cmds; i++) nvmet_rdma_free_cmd(ndev, cmds + i, admin); - kfree(cmds); + kvfree(cmds); } static int nvmet_rdma_alloc_rsp(struct nvmet_rdma_device *ndev, @@ -455,7 +455,7 @@ nvmet_rdma_alloc_rsps(struct nvmet_rdma_queue *queue) NUMA_NO_NODE, false, true)) goto out; - queue->rsps = kcalloc(nr_rsps, sizeof(struct nvmet_rdma_rsp), + queue->rsps = kvcalloc(nr_rsps, sizeof(struct nvmet_rdma_rsp), GFP_KERNEL); if (!queue->rsps) goto out_free_sbitmap; @@ -473,7 +473,7 @@ nvmet_rdma_alloc_rsps(struct nvmet_rdma_queue *queue) out_free: while (--i >= 0) nvmet_rdma_free_rsp(ndev, &queue->rsps[i]); - kfree(queue->rsps); + kvfree(queue->rsps); out_free_sbitmap: sbitmap_free(&queue->rsp_tags); out: @@ -487,7 +487,7 @@ static void nvmet_rdma_free_rsps(struct nvmet_rdma_queue *queue) for (i = 0; i < nr_rsps; i++) nvmet_rdma_free_rsp(ndev, &queue->rsps[i]); - kfree(queue->rsps); + kvfree(queue->rsps); sbitmap_free(&queue->rsp_tags); } -- 2.47.3