diff options
Diffstat (limited to 'target/linux/layerscape/patches-5.4/809-jailhouse-0002-ivshmem-net-Map-shmem-region-as-RAM.patch')
| -rw-r--r-- | target/linux/layerscape/patches-5.4/809-jailhouse-0002-ivshmem-net-Map-shmem-region-as-RAM.patch | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/target/linux/layerscape/patches-5.4/809-jailhouse-0002-ivshmem-net-Map-shmem-region-as-RAM.patch b/target/linux/layerscape/patches-5.4/809-jailhouse-0002-ivshmem-net-Map-shmem-region-as-RAM.patch new file mode 100644 index 0000000000..8a3bcd6502 --- /dev/null +++ b/target/linux/layerscape/patches-5.4/809-jailhouse-0002-ivshmem-net-Map-shmem-region-as-RAM.patch @@ -0,0 +1,26 @@ +From 4677dd55d55832dab1e4f41fe9a7fabe8bb95197 Mon Sep 17 00:00:00 2001 +From: Jan Kiszka <jan.kiszka@siemens.com> +Date: Thu, 24 Nov 2016 08:27:45 +0100 +Subject: [PATCH] ivshmem-net: Map shmem region as RAM + +No need for special caching, simply map the shared memory region like +RAM, thus write-back. This gives us another order of magnitude in +throughput. + +Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> +(cherry picked from commit af59c6541a65622cab498851e01653dd378cd9f8) +--- + drivers/net/ivshmem-net.c | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +--- a/drivers/net/ivshmem-net.c ++++ b/drivers/net/ivshmem-net.c +@@ -802,7 +802,7 @@ static int ivshm_net_probe(struct pci_de + if (!devm_request_mem_region(&pdev->dev, shmaddr, shmlen, DRV_NAME)) + return -EBUSY; + +- shm = devm_memremap(&pdev->dev, shmaddr, shmlen, MEMREMAP_WC); ++ shm = devm_memremap(&pdev->dev, shmaddr, shmlen, MEMREMAP_WB); + if (!shm) + return -ENOMEM; + |