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-rw-r--r--Documentation/admin-guide/sysctl/net.rst10
1 files changed, 9 insertions, 1 deletions
diff --git a/Documentation/admin-guide/sysctl/net.rst b/Documentation/admin-guide/sysctl/net.rst
index c7525942f1..7250c05428 100644
--- a/Documentation/admin-guide/sysctl/net.rst
+++ b/Documentation/admin-guide/sysctl/net.rst
@@ -206,6 +206,11 @@ Will increase power usage.
Default: 0 (off)
+mem_pcpu_rsv
+------------
+
+Per-cpu reserved forward alloc cache size in page units. Default 1MB per CPU.
+
rmem_default
------------
@@ -345,7 +350,10 @@ optmem_max
----------
Maximum ancillary buffer size allowed per socket. Ancillary data is a sequence
-of struct cmsghdr structures with appended data.
+of struct cmsghdr structures with appended data. TCP tx zerocopy also uses
+optmem_max as a limit for its internal structures.
+
+Default : 128 KB
fb_tunnels_only_for_init_net
----------------------------