84eb8d0608
Randy brought it to my attention that in proper english "can not" should always be written "cannot". I donot see any reason to argue, even if I mightnot understand why this rule exists. This patch fixes "can not" in several Documentation files as well as three Kconfigs. Signed-off-by: Matt LaPlante <kernel1@cyberdogtech.com> Acked-by: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by: Adrian Bunk <bunk@stusta.de>
57 lines
2.2 KiB
Text
57 lines
2.2 KiB
Text
|
|
started by Ingo Molnar <mingo@redhat.com>, 2001.09.17
|
|
2.6 port and netpoll api by Matt Mackall <mpm@selenic.com>, Sep 9 2003
|
|
|
|
Please send bug reports to Matt Mackall <mpm@selenic.com>
|
|
|
|
This module logs kernel printk messages over UDP allowing debugging of
|
|
problem where disk logging fails and serial consoles are impractical.
|
|
|
|
It can be used either built-in or as a module. As a built-in,
|
|
netconsole initializes immediately after NIC cards and will bring up
|
|
the specified interface as soon as possible. While this doesn't allow
|
|
capture of early kernel panics, it does capture most of the boot
|
|
process.
|
|
|
|
It takes a string configuration parameter "netconsole" in the
|
|
following format:
|
|
|
|
netconsole=[src-port]@[src-ip]/[<dev>],[tgt-port]@<tgt-ip>/[tgt-macaddr]
|
|
|
|
where
|
|
src-port source for UDP packets (defaults to 6665)
|
|
src-ip source IP to use (interface address)
|
|
dev network interface (eth0)
|
|
tgt-port port for logging agent (6666)
|
|
tgt-ip IP address for logging agent
|
|
tgt-macaddr ethernet MAC address for logging agent (broadcast)
|
|
|
|
Examples:
|
|
|
|
linux netconsole=4444@10.0.0.1/eth1,9353@10.0.0.2/12:34:56:78:9a:bc
|
|
|
|
or
|
|
|
|
insmod netconsole netconsole=@/,@10.0.0.2/
|
|
|
|
Built-in netconsole starts immediately after the TCP stack is
|
|
initialized and attempts to bring up the supplied dev at the supplied
|
|
address.
|
|
|
|
The remote host can run either 'netcat -u -l -p <port>' or syslogd.
|
|
|
|
WARNING: the default target ethernet setting uses the broadcast
|
|
ethernet address to send packets, which can cause increased load on
|
|
other systems on the same ethernet segment.
|
|
|
|
NOTE: the network device (eth1 in the above case) can run any kind
|
|
of other network traffic, netconsole is not intrusive. Netconsole
|
|
might cause slight delays in other traffic if the volume of kernel
|
|
messages is high, but should have no other impact.
|
|
|
|
Netconsole was designed to be as instantaneous as possible, to
|
|
enable the logging of even the most critical kernel bugs. It works
|
|
from IRQ contexts as well, and does not enable interrupts while
|
|
sending packets. Due to these unique needs, configuration cannot
|
|
be more automatic, and some fundamental limitations will remain:
|
|
only IP networks, UDP packets and ethernet devices are supported.
|