From 1c7d6584a7811b7785ae5c1e378f14b5ba0971cf Mon Sep 17 00:00:00 2001 From: takeshi_hoshina Date: Mon, 2 Nov 2020 11:07:33 +0900 Subject: basesystem-jj recipes --- .../0014-ivshmem-net-Map-shmem-region-as-RAM.patch | 30 ++++++++++++++++++++++ 1 file changed, 30 insertions(+) create mode 100644 meta-agl-devel/meta-agl-jailhouse/recipes-kernel/linux/linux/0014-ivshmem-net-Map-shmem-region-as-RAM.patch (limited to 'meta-agl-devel/meta-agl-jailhouse/recipes-kernel/linux/linux/0014-ivshmem-net-Map-shmem-region-as-RAM.patch') diff --git a/meta-agl-devel/meta-agl-jailhouse/recipes-kernel/linux/linux/0014-ivshmem-net-Map-shmem-region-as-RAM.patch b/meta-agl-devel/meta-agl-jailhouse/recipes-kernel/linux/linux/0014-ivshmem-net-Map-shmem-region-as-RAM.patch new file mode 100644 index 00000000..de66d7a7 --- /dev/null +++ b/meta-agl-devel/meta-agl-jailhouse/recipes-kernel/linux/linux/0014-ivshmem-net-Map-shmem-region-as-RAM.patch @@ -0,0 +1,30 @@ +From b70f2ecb71b212225f403a8f26d3d5bdca70a107 Mon Sep 17 00:00:00 2001 +From: Jan Kiszka +Date: Thu, 24 Nov 2016 08:27:45 +0100 +Subject: [PATCH 14/32] 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 +--- + drivers/net/ivshmem-net.c | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +diff --git a/drivers/net/ivshmem-net.c b/drivers/net/ivshmem-net.c +index b676bed2cc2e..a535cb71adde 100644 +--- a/drivers/net/ivshmem-net.c ++++ b/drivers/net/ivshmem-net.c +@@ -802,7 +802,7 @@ static int ivshm_net_probe(struct pci_dev *pdev, + 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; + +-- +2.11.0 + -- cgit 1.2.3-korg