| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame] | 1 | From 4677dd55d55832dab1e4f41fe9a7fabe8bb95197 Mon Sep 17 00:00:00 2001 |
| 2 | From: Jan Kiszka <jan.kiszka@siemens.com> |
| 3 | Date: Thu, 24 Nov 2016 08:27:45 +0100 |
| 4 | Subject: [PATCH] ivshmem-net: Map shmem region as RAM |
| 5 | |
| 6 | No need for special caching, simply map the shared memory region like |
| 7 | RAM, thus write-back. This gives us another order of magnitude in |
| 8 | throughput. |
| 9 | |
| 10 | Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> |
| 11 | (cherry picked from commit af59c6541a65622cab498851e01653dd378cd9f8) |
| 12 | --- |
| 13 | drivers/net/ivshmem-net.c | 2 +- |
| 14 | 1 file changed, 1 insertion(+), 1 deletion(-) |
| 15 | |
| 16 | --- a/drivers/net/ivshmem-net.c |
| 17 | +++ b/drivers/net/ivshmem-net.c |
| 18 | @@ -802,7 +802,7 @@ static int ivshm_net_probe(struct pci_de |
| 19 | if (!devm_request_mem_region(&pdev->dev, shmaddr, shmlen, DRV_NAME)) |
| 20 | return -EBUSY; |
| 21 | |
| 22 | - shm = devm_memremap(&pdev->dev, shmaddr, shmlen, MEMREMAP_WC); |
| 23 | + shm = devm_memremap(&pdev->dev, shmaddr, shmlen, MEMREMAP_WB); |
| 24 | if (!shm) |
| 25 | return -ENOMEM; |
| 26 | |