[dpdk-dev] [PATCH v2 06/23] mlx4: allow applications to partially use fork()
Adrien Mazarguil
adrien.mazarguil at 6wind.com
Tue Jun 30 11:27:52 CEST 2015
From: Olga Shern <olgas at mellanox.com>
Although using the PMD from a forked process is still unsupported, this
commit makes Verbs safe enough for applications to call fork() for other
purposes.
Signed-off-by: Olga Shern <olgas at mellanox.com>
Signed-off-by: Adrien Mazarguil <adrien.mazarguil at 6wind.com>
---
drivers/net/mlx4/mlx4.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/net/mlx4/mlx4.c b/drivers/net/mlx4/mlx4.c
index 8be1574..ed68beb 100644
--- a/drivers/net/mlx4/mlx4.c
+++ b/drivers/net/mlx4/mlx4.c
@@ -4686,6 +4686,14 @@ rte_mlx4_pmd_init(const char *name, const char *args)
{
(void)name;
(void)args;
+ /*
+ * RDMAV_HUGEPAGES_SAFE tells ibv_fork_init() we intend to use
+ * huge pages. Calling ibv_fork_init() during init allows
+ * applications to use fork() safely for purposes other than
+ * using this PMD, which is not supported in forked processes.
+ */
+ setenv("RDMAV_HUGEPAGES_SAFE", "1", 1);
+ ibv_fork_init();
rte_eal_pci_register(&mlx4_driver.pci_drv);
return 0;
}
--
2.1.0
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