Default: 4K
udp_wmem_min - INTEGER
- Minimal size of send buffer used by UDP sockets in moderation.
- Each UDP socket is able to use the size for sending data, even if
- total pages of UDP sockets exceed udp_mem pressure. The unit is byte.
-
- Default: 4K
+ UDP does not have tx memory accounting and this tunable has no effect.
RAW variables
=============
cipso_cache_bucket_size - INTEGER
The CIPSO label cache consists of a fixed size hash table with each
hash bucket containing a number of cache entries. This variable limits
- the number of entries in each hash bucket; the larger the value the
+ the number of entries in each hash bucket; the larger the value is, the
more CIPSO label mappings that can be cached. When the number of
entries in a given hash bucket reaches this limit adding new entries
causes the oldest entry in the bucket to be removed to make room.
option should only be set by experts.
Default: 0
-ip_dynaddr - BOOLEAN
+ip_dynaddr - INTEGER
If set non-zero, enables support for dynamic addresses.
If set to a non-zero value larger than 1, a kernel log
message will be printed when dynamic address rewriting
Default: 4K
sctp_wmem - vector of 3 INTEGERs: min, default, max
- Currently this tunable has no effect.
+ Only the first value ("min") is used, "default" and "max" are
+ ignored.
+
+ min: Minimum size of send buffer that can be used by SCTP sockets.
+ It is guaranteed to each SCTP socket (but not association) even
+ under moderate memory pressure.
+
+ Default: 4K
addr_scope_policy - INTEGER
Control IPv4 address scoping - draft-stewart-tsvwg-sctp-ipv4-00