libibverbs: ignore IBV_FORK_SAFE et.al. when kernel has fork support

ibv_fork_init will now check if IBV_FORK_UNNEEDED is true, and if so will skip initialization of mm_root. Environment variables like IBV_FORK_SAFE and UCX_IB_FORK_INIT are silently ignored when the kernel has the necessary fork support. Signed-off-by: Kevan Rehm <[email protected]>
linux-rdma · Feb 20, 2024 · 5a11b68 · 5a11b68
1 parent 40fcc1c
commit 5a11b68
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/libibverbs/memory.c b/libibverbs/memory.c
@@ -134,6 +134,9 @@ int ibv_fork_init(void)
  if (mm_root)
  return 0;
 
+ if (ibv_is_fork_initialized() == IBV_FORK_UNNEEDED)
+ return 0;
+
  if (too_late)
  return EINVAL;