admin-guide/sysctl/net.rst

9 	- Terrehon Bowden <terrehon@pacbell.net>
10 	- Bodo Bauer <bb@ricochet.net>
14 	- Jorge Nerin <comandante@zaralinux.com>
18 	- Shen Feng <shen@cn.fujitsu.com>
22 ------------------------------------------------------------------------------
29 see only some of them, depending on your kernel's configuration.
46 1. /proc/sys/net/core - Network core options
50 --------------
62   - x86_64
63   - x86_32
64   - arm64
65   - arm32
66   - ppc64
67   - sparc64
68   - mips64
69   - s390x
70   - riscv64
71   - riscv32
75   - mips
76   - ppc
77   - sparc
81 compile them transparently. Older cBPF JITs can only translate
87 	- 0 - disable the JIT (default value)
88 	- 1 - enable the JIT
89 	- 2 - enable the JIT and ask the compiler to emit traces on kernel log.
92 --------------
100 	- 0 - disable JIT hardening (default value)
101 	- 1 - enable JIT hardening for unprivileged users only
102 	- 2 - enable JIT hardening for all users
105 ----------------
115 	- 0 - disable JIT kallsyms export (default value)
116 	- 1 - enable JIT kallsyms export for privileged users only
119 -------------
127 ----------
130 it's a Per-CPU variable. For drivers that support LRO or GRO_HW, a hardware
136 ------------------
138 RPS (e.g. RFS, aRFS) processing is competing with the registered NAPI poll function
149 ------------------
160 -------------
176 ---------
178 Low latency busy poll timeout for socket reads. (needs CONFIG_NET_RX_BUSY_POLL)
190 ----------------
191 Low latency busy poll timeout for poll and select. (needs CONFIG_NET_RX_BUSY_POLL)
193 Recommended value depends on the number of sockets you poll on.
196 Note that only sockets with SO_BUSY_POLL set will be busy polled,
205 ------------
210 --------
215 -----------------
224 ------------
229 --------
234 ------------------------------
238 denial-of-service attack  impossible. A higher message_cost factor, results in
244 --------
256 -------------
259 poll). In one polling cycle interfaces which are registered to polling are
260 probed in a round-robin manner. Also, a polling cycle may not exceed
265 ---------------------
269 poll cycle or the number of packets processed reaches netdev_budget.
272 ------------------
278 --------------
283 provide ethtool -x support yet.
294   but most drivers only use 40 bytes of it.
298   myhost:~# ethtool -x eth0
305 ----------------------
315 ----------
321 ----------------------------
328 created only in init net namespace and every other net namespace will
332 "2" is pointless after boot if these modules are built-in, so there is
333 a kernel command-line option that can change this default. Please refer to
334 Documentation/admin-guide/kernel-parameters.txt for additional details.
337 whatever is needed only and avoid creating devices which are redundant.
342 ------------------------
357 2. /proc/sys/net/unix - Parameters for Unix domain sockets
358 ----------------------------------------------------------
360 There is only one file in this directory.
365 3. /proc/sys/net/ipv4 - IPV4 settings
366 -------------------------------------
367 Please see: Documentation/networking/ip-sysctl.rst and
368 Documentation/admin-guide/sysctl/net.rst for descriptions of these entries.
372 ------------
377 aarp-expiry-time
378 ----------------
383 aarp-resolve-time
384 -----------------
388 aarp-retransmit-limit
389 ---------------------
393 aarp-tick-time
394 --------------
416 -------
419 ---------
422 tcp_rmem - i.e. a vector of 3 INTEGERs: (min, default, max)
436 -------------