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 ------------------------------------------------------------------------------
47 1. /proc/sys/net/core - Network core options
51 --------------
57 and security (e.g. seccomp). LLVM has a BPF back end that can compile
63   - x86_64
64   - x86_32
65   - arm64
66   - arm32
67   - ppc64
68   - ppc32
69   - sparc64
70   - mips64
71   - s390x
72   - riscv64
73   - riscv32
77   - mips
78   - sparc
83 tcpdump filters, seccomp rules, etc, but not mentioned eBPF
88 	- 0 - disable the JIT (default value)
89 	- 1 - enable the JIT
90 	- 2 - enable the JIT and ask the compiler to emit traces on kernel log.
93 --------------
101 	- 0 - disable JIT hardening (default value)
102 	- 1 - enable JIT hardening for unprivileged users only
103 	- 2 - enable JIT hardening for all users
109 ----------------
119 	- 0 - disable JIT kallsyms export (default value)
120 	- 1 - enable JIT kallsyms export for privileged users only
123 -------------
131 ----------
134 it's a Per-CPU variable. For drivers that support LRO or GRO_HW, a hardware
140 ------------------
153 ------------------
164 -------------
180 ---------
194 ----------------
209 ------------
211 Per-cpu reserved forward alloc cache size in page units. Default 1MB per CPU.
214 ------------
219 --------
224 ----------------
230 -----------------
239 ------------
244 --------
249 ------------------------------
253 denial-of-service attack  impossible. A higher message_cost factor, results in
259 --------
271 -------------
275 probed in a round-robin manner. Also, a polling cycle may not exceed
280 ---------------------
287 ------------------
293 --------------
298 provide ethtool -x support yet.
313   myhost:~# ethtool -x eth0
320 ----------------------
330 ------------------------------
341 -------------
343 Max size (in skbs) of the per-cpu list of skbs being freed
349 ----------
355 ----------------------------
366 "2" is pointless after boot if these modules are built-in, so there is
367 a kernel command-line option that can change this default. Please refer to
368 Documentation/admin-guide/kernel-parameters.txt for additional details.
376 ------------------------
392 --------
401 ----------------
405 GRO has decided not to coalesce, it is placed on a per-NAPI list. This
410 ------------------------
412 By default the allocator for page frags tries to use high order pages (order-3
415 true on older kernels (< 5.14) when high-order pages were not stored on per-cpu
416 lists. This allows to opt-in for order-0 allocation instead but is now mostly of
421 2. /proc/sys/net/unix - Parameters for Unix domain sockets
422 ----------------------------------------------------------
429 3. /proc/sys/net/ipv4 - IPV4 settings
430 -------------------------------------
431 Please see: Documentation/networking/ip-sysctl.rst and
432 Documentation/admin-guide/sysctl/net.rst for descriptions of these entries.
436 ------------
441 aarp-expiry-time
442 ----------------
447 aarp-resolve-time
448 -----------------
452 aarp-retransmit-limit
453 ---------------------
457 aarp-tick-time
458 --------------
480 -------
483 ---------
486 tcp_rmem - i.e. a vector of 3 INTEGERs: (min, default, max)
500 -------------