forked from Minki/linux
documentation: update Documentation/filesystem/proc.txt and Documentation/sysctls
Now /proc/sys is described in many places and much information is redundant. This patch updates the proc.txt and move the /proc/sys desciption out to the files in Documentation/sysctls. Details are: merge - 2.1 /proc/sys/fs - File system data - 2.11 /proc/sys/fs/mqueue - POSIX message queues filesystem - 2.17 /proc/sys/fs/epoll - Configuration options for the epoll interface with Documentation/sysctls/fs.txt. remove - 2.2 /proc/sys/fs/binfmt_misc - Miscellaneous binary formats since it's not better then the Documentation/binfmt_misc.txt. merge - 2.3 /proc/sys/kernel - general kernel parameters with Documentation/sysctls/kernel.txt remove - 2.5 /proc/sys/dev - Device specific parameters since it's obsolete the sysfs is used now. remove - 2.6 /proc/sys/sunrpc - Remote procedure calls since it's not better then the Documentation/sysctls/sunrpc.txt move - 2.7 /proc/sys/net - Networking stuff - 2.9 Appletalk - 2.10 IPX to newly created Documentation/sysctls/net.txt. remove - 2.8 /proc/sys/net/ipv4 - IPV4 settings since it's not better then the Documentation/networking/ip-sysctl.txt. add - Chapter 3 Per-Process Parameters to descibe /proc/<pid>/xxx parameters. Signed-off-by: Shen Feng <shen@cn.fujitsu.com> Cc: Randy Dunlap <randy.dunlap@oracle.com> Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Shen Feng
Linus Torvalds
parent
70eed8d066
commit
760df93ecd
File diff suppressed because it is too large
Load Diff
@ -10,6 +10,8 @@ fs.txt
|
||||
- documentation for /proc/sys/fs/*.
|
||||
kernel.txt
|
||||
- documentation for /proc/sys/kernel/*.
|
||||
net.txt
|
||||
- documentation for /proc/sys/net/*.
|
||||
sunrpc.txt
|
||||
- documentation for /proc/sys/sunrpc/*.
|
||||
vm.txt
|
||||
|
||||
@ -1,5 +1,6 @@
|
||||
Documentation for /proc/sys/fs/* kernel version 2.2.10
|
||||
(c) 1998, 1999, Rik van Riel <riel@nl.linux.org>
|
||||
(c) 2009, Shen Feng<shen@cn.fujitsu.com>
|
||||
|
||||
For general info and legal blurb, please look in README.
|
||||
|
||||
@ -14,7 +15,12 @@ kernel. Since some of the files _can_ be used to screw up your
|
||||
system, it is advisable to read both documentation and source
|
||||
before actually making adjustments.
|
||||
|
||||
1. /proc/sys/fs
|
||||
----------------------------------------------------------
|
||||
|
||||
Currently, these files are in /proc/sys/fs:
|
||||
- aio-max-nr
|
||||
- aio-nr
|
||||
- dentry-state
|
||||
- dquot-max
|
||||
- dquot-nr
|
||||
@ -30,8 +36,15 @@ Currently, these files are in /proc/sys/fs:
|
||||
- super-max
|
||||
- super-nr
|
||||
|
||||
Documentation for the files in /proc/sys/fs/binfmt_misc is
|
||||
in Documentation/binfmt_misc.txt.
|
||||
==============================================================
|
||||
|
||||
aio-nr & aio-max-nr:
|
||||
|
||||
aio-nr is the running total of the number of events specified on the
|
||||
io_setup system call for all currently active aio contexts. If aio-nr
|
||||
reaches aio-max-nr then io_setup will fail with EAGAIN. Note that
|
||||
raising aio-max-nr does not result in the pre-allocation or re-sizing
|
||||
of any kernel data structures.
|
||||
|
||||
==============================================================
|
||||
|
||||
@ -178,3 +191,60 @@ requests. aio-max-nr allows you to change the maximum value
|
||||
aio-nr can grow to.
|
||||
|
||||
==============================================================
|
||||
|
||||
|
||||
2. /proc/sys/fs/binfmt_misc
|
||||
----------------------------------------------------------
|
||||
|
||||
Documentation for the files in /proc/sys/fs/binfmt_misc is
|
||||
in Documentation/binfmt_misc.txt.
|
||||
|
||||
|
||||
3. /proc/sys/fs/mqueue - POSIX message queues filesystem
|
||||
----------------------------------------------------------
|
||||
|
||||
The "mqueue" filesystem provides the necessary kernel features to enable the
|
||||
creation of a user space library that implements the POSIX message queues
|
||||
API (as noted by the MSG tag in the POSIX 1003.1-2001 version of the System
|
||||
Interfaces specification.)
|
||||
|
||||
The "mqueue" filesystem contains values for determining/setting the amount of
|
||||
resources used by the file system.
|
||||
|
||||
/proc/sys/fs/mqueue/queues_max is a read/write file for setting/getting the
|
||||
maximum number of message queues allowed on the system.
|
||||
|
||||
/proc/sys/fs/mqueue/msg_max is a read/write file for setting/getting the
|
||||
maximum number of messages in a queue value. In fact it is the limiting value
|
||||
for another (user) limit which is set in mq_open invocation. This attribute of
|
||||
a queue must be less or equal then msg_max.
|
||||
|
||||
/proc/sys/fs/mqueue/msgsize_max is a read/write file for setting/getting the
|
||||
maximum message size value (it is every message queue's attribute set during
|
||||
its creation).
|
||||
|
||||
|
||||
4. /proc/sys/fs/epoll - Configuration options for the epoll interface
|
||||
--------------------------------------------------------
|
||||
|
||||
This directory contains configuration options for the epoll(7) interface.
|
||||
|
||||
max_user_instances
|
||||
------------------
|
||||
|
||||
This is the maximum number of epoll file descriptors that a single user can
|
||||
have open at a given time. The default value is 128, and should be enough
|
||||
for normal users.
|
||||
|
||||
max_user_watches
|
||||
----------------
|
||||
|
||||
Every epoll file descriptor can store a number of files to be monitored
|
||||
for event readiness. Each one of these monitored files constitutes a "watch".
|
||||
This configuration option sets the maximum number of "watches" that are
|
||||
allowed for each user.
|
||||
Each "watch" costs roughly 90 bytes on a 32bit kernel, and roughly 160 bytes
|
||||
on a 64bit one.
|
||||
The current default value for max_user_watches is the 1/32 of the available
|
||||
low memory, divided for the "watch" cost in bytes.
|
||||
|
||||
|
||||
@ -1,5 +1,6 @@
|
||||
Documentation for /proc/sys/kernel/* kernel version 2.2.10
|
||||
(c) 1998, 1999, Rik van Riel <riel@nl.linux.org>
|
||||
(c) 2009, Shen Feng<shen@cn.fujitsu.com>
|
||||
|
||||
For general info and legal blurb, please look in README.
|
||||
|
||||
@ -18,6 +19,7 @@ Currently, these files might (depending on your configuration)
|
||||
show up in /proc/sys/kernel:
|
||||
- acpi_video_flags
|
||||
- acct
|
||||
- auto_msgmni
|
||||
- core_pattern
|
||||
- core_uses_pid
|
||||
- ctrl-alt-del
|
||||
@ -33,6 +35,7 @@ show up in /proc/sys/kernel:
|
||||
- msgmax
|
||||
- msgmnb
|
||||
- msgmni
|
||||
- nmi_watchdog
|
||||
- osrelease
|
||||
- ostype
|
||||
- overflowgid
|
||||
@ -40,6 +43,7 @@ show up in /proc/sys/kernel:
|
||||
- panic
|
||||
- pid_max
|
||||
- powersave-nap [ PPC only ]
|
||||
- panic_on_unrecovered_nmi
|
||||
- printk
|
||||
- randomize_va_space
|
||||
- real-root-dev ==> Documentation/initrd.txt
|
||||
@ -55,6 +59,7 @@ show up in /proc/sys/kernel:
|
||||
- sysrq ==> Documentation/sysrq.txt
|
||||
- tainted
|
||||
- threads-max
|
||||
- unknown_nmi_panic
|
||||
- version
|
||||
|
||||
==============================================================
|
||||
@ -381,3 +386,51 @@ can be ORed together:
|
||||
512 - A kernel warning has occurred.
|
||||
1024 - A module from drivers/staging was loaded.
|
||||
|
||||
==============================================================
|
||||
|
||||
auto_msgmni:
|
||||
|
||||
Enables/Disables automatic recomputing of msgmni upon memory add/remove or
|
||||
upon ipc namespace creation/removal (see the msgmni description above).
|
||||
Echoing "1" into this file enables msgmni automatic recomputing.
|
||||
Echoing "0" turns it off.
|
||||
auto_msgmni default value is 1.
|
||||
|
||||
==============================================================
|
||||
|
||||
nmi_watchdog:
|
||||
|
||||
Enables/Disables the NMI watchdog on x86 systems. When the value is non-zero
|
||||
the NMI watchdog is enabled and will continuously test all online cpus to
|
||||
determine whether or not they are still functioning properly. Currently,
|
||||
passing "nmi_watchdog=" parameter at boot time is required for this function
|
||||
to work.
|
||||
|
||||
If LAPIC NMI watchdog method is in use (nmi_watchdog=2 kernel parameter), the
|
||||
NMI watchdog shares registers with oprofile. By disabling the NMI watchdog,
|
||||
oprofile may have more registers to utilize.
|
||||
|
||||
==============================================================
|
||||
|
||||
unknown_nmi_panic:
|
||||
|
||||
The value in this file affects behavior of handling NMI. When the value is
|
||||
non-zero, unknown NMI is trapped and then panic occurs. At that time, kernel
|
||||
debugging information is displayed on console.
|
||||
|
||||
NMI switch that most IA32 servers have fires unknown NMI up, for example.
|
||||
If a system hangs up, try pressing the NMI switch.
|
||||
|
||||
==============================================================
|
||||
|
||||
panic_on_unrecovered_nmi:
|
||||
|
||||
The default Linux behaviour on an NMI of either memory or unknown is to continue
|
||||
operation. For many environments such as scientific computing it is preferable
|
||||
that the box is taken out and the error dealt with than an uncorrected
|
||||
parity/ECC error get propogated.
|
||||
|
||||
A small number of systems do generate NMI's for bizarre random reasons such as
|
||||
power management so the default is off. That sysctl works like the existing
|
||||
panic controls already in that directory.
|
||||
|
||||
|
||||
174
Documentation/sysctl/net.txt
Normal file
174
Documentation/sysctl/net.txt
Normal file
@ -0,0 +1,174 @@
|
||||
Documentation for /proc/sys/net/* kernel version 2.4.0-test11-pre4
|
||||
(c) 1999 Terrehon Bowden <terrehon@pacbell.net>
|
||||
Bodo Bauer <bb@ricochet.net>
|
||||
(c) 2000 Jorge Nerin <comandante@zaralinux.com>
|
||||
(c) 2009 Shen Feng <shen@cn.fujitsu.com>
|
||||
|
||||
For general info and legal blurb, please look in README.
|
||||
|
||||
==============================================================
|
||||
|
||||
This file contains the documentation for the sysctl files in
|
||||
/proc/sys/net and is valid for Linux kernel version 2.4.0-test11-pre4.
|
||||
|
||||
The interface to the networking parts of the kernel is located in
|
||||
/proc/sys/net. The following table shows all possible subdirectories.You may
|
||||
see only some of them, depending on your kernel's configuration.
|
||||
|
||||
|
||||
Table : Subdirectories in /proc/sys/net
|
||||
..............................................................................
|
||||
Directory Content Directory Content
|
||||
core General parameter appletalk Appletalk protocol
|
||||
unix Unix domain sockets netrom NET/ROM
|
||||
802 E802 protocol ax25 AX25
|
||||
ethernet Ethernet protocol rose X.25 PLP layer
|
||||
ipv4 IP version 4 x25 X.25 protocol
|
||||
ipx IPX token-ring IBM token ring
|
||||
bridge Bridging decnet DEC net
|
||||
ipv6 IP version 6
|
||||
..............................................................................
|
||||
|
||||
1. /proc/sys/net/core - Network core options
|
||||
-------------------------------------------------------
|
||||
|
||||
rmem_default
|
||||
------------
|
||||
|
||||
The default setting of the socket receive buffer in bytes.
|
||||
|
||||
rmem_max
|
||||
--------
|
||||
|
||||
The maximum receive socket buffer size in bytes.
|
||||
|
||||
wmem_default
|
||||
------------
|
||||
|
||||
The default setting (in bytes) of the socket send buffer.
|
||||
|
||||
wmem_max
|
||||
--------
|
||||
|
||||
The maximum send socket buffer size in bytes.
|
||||
|
||||
message_burst and message_cost
|
||||
------------------------------
|
||||
|
||||
These parameters are used to limit the warning messages written to the kernel
|
||||
log from the networking code. They enforce a rate limit to make a
|
||||
denial-of-service attack impossible. A higher message_cost factor, results in
|
||||
fewer messages that will be written. Message_burst controls when messages will
|
||||
be dropped. The default settings limit warning messages to one every five
|
||||
seconds.
|
||||
|
||||
warnings
|
||||
--------
|
||||
|
||||
This controls console messages from the networking stack that can occur because
|
||||
of problems on the network like duplicate address or bad checksums. Normally,
|
||||
this should be enabled, but if the problem persists the messages can be
|
||||
disabled.
|
||||
|
||||
netdev_budget
|
||||
-------------
|
||||
|
||||
Maximum number of packets taken from all interfaces in one polling cycle (NAPI
|
||||
poll). In one polling cycle interfaces which are registered to polling are
|
||||
probed in a round-robin manner. The limit of packets in one such probe can be
|
||||
set per-device via sysfs class/net/<device>/weight .
|
||||
|
||||
netdev_max_backlog
|
||||
------------------
|
||||
|
||||
Maximum number of packets, queued on the INPUT side, when the interface
|
||||
receives packets faster than kernel can process them.
|
||||
|
||||
optmem_max
|
||||
----------
|
||||
|
||||
Maximum ancillary buffer size allowed per socket. Ancillary data is a sequence
|
||||
of struct cmsghdr structures with appended data.
|
||||
|
||||
2. /proc/sys/net/unix - Parameters for Unix domain sockets
|
||||
-------------------------------------------------------
|
||||
|
||||
There are only two files in this subdirectory. They control the delays for
|
||||
deleting and destroying socket descriptors.
|
||||
|
||||
|
||||
3. /proc/sys/net/ipv4 - IPV4 settings
|
||||
-------------------------------------------------------
|
||||
Please see: Documentation/networking/ip-sysctl.txt and ipvs-sysctl.txt for
|
||||
descriptions of these entries.
|
||||
|
||||
|
||||
4. Appletalk
|
||||
-------------------------------------------------------
|
||||
|
||||
The /proc/sys/net/appletalk directory holds the Appletalk configuration data
|
||||
when Appletalk is loaded. The configurable parameters are:
|
||||
|
||||
aarp-expiry-time
|
||||
----------------
|
||||
|
||||
The amount of time we keep an ARP entry before expiring it. Used to age out
|
||||
old hosts.
|
||||
|
||||
aarp-resolve-time
|
||||
-----------------
|
||||
|
||||
The amount of time we will spend trying to resolve an Appletalk address.
|
||||
|
||||
aarp-retransmit-limit
|
||||
---------------------
|
||||
|
||||
The number of times we will retransmit a query before giving up.
|
||||
|
||||
aarp-tick-time
|
||||
--------------
|
||||
|
||||
Controls the rate at which expires are checked.
|
||||
|
||||
The directory /proc/net/appletalk holds the list of active Appletalk sockets
|
||||
on a machine.
|
||||
|
||||
The fields indicate the DDP type, the local address (in network:node format)
|
||||
the remote address, the size of the transmit pending queue, the size of the
|
||||
received queue (bytes waiting for applications to read) the state and the uid
|
||||
owning the socket.
|
||||
|
||||
/proc/net/atalk_iface lists all the interfaces configured for appletalk.It
|
||||
shows the name of the interface, its Appletalk address, the network range on
|
||||
that address (or network number for phase 1 networks), and the status of the
|
||||
interface.
|
||||
|
||||
/proc/net/atalk_route lists each known network route. It lists the target
|
||||
(network) that the route leads to, the router (may be directly connected), the
|
||||
route flags, and the device the route is using.
|
||||
|
||||
|
||||
5. IPX
|
||||
-------------------------------------------------------
|
||||
|
||||
The IPX protocol has no tunable values in proc/sys/net.
|
||||
|
||||
The IPX protocol does, however, provide proc/net/ipx. This lists each IPX
|
||||
socket giving the local and remote addresses in Novell format (that is
|
||||
network:node:port). In accordance with the strange Novell tradition,
|
||||
everything but the port is in hex. Not_Connected is displayed for sockets that
|
||||
are not tied to a specific remote address. The Tx and Rx queue sizes indicate
|
||||
the number of bytes pending for transmission and reception. The state
|
||||
indicates the state the socket is in and the uid is the owning uid of the
|
||||
socket.
|
||||
|
||||
The /proc/net/ipx_interface file lists all IPX interfaces. For each interface
|
||||
it gives the network number, the node number, and indicates if the network is
|
||||
the primary network. It also indicates which device it is bound to (or
|
||||
Internal for internal networks) and the Frame Type if appropriate. Linux
|
||||
supports 802.3, 802.2, 802.2 SNAP and DIX (Blue Book) ethernet framing for
|
||||
IPX.
|
||||
|
||||
The /proc/net/ipx_route table holds a list of IPX routes. For each route it
|
||||
gives the destination network, the router node (or Directly) and the network
|
||||
address of the router (or Connected) for internal networks.
|
||||
Loading…
Reference in New Issue
Block a user