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r: 163506
b: refs/heads/master
c: 0858d9c
h: refs/heads/master
v: v3
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Paul Mundt committed Aug 23, 2009
1 parent 9679987 commit ce61a37
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2 changes: 1 addition & 1 deletion [refs]
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@@ -1,2 +1,2 @@
---
refs/heads/master: 963e04cafbf001ec431025a46ec246ae6d89daba
refs/heads/master: 0858d9c0c591ce9baa1baf72eaf6f67823f3bc25
26 changes: 12 additions & 14 deletions trunk/Documentation/filesystems/afs.txt
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Expand Up @@ -23,15 +23,13 @@ it does support include:

(*) Security (currently only AFS kaserver and KerberosIV tickets).

(*) File reading.
(*) File reading and writing.

(*) Automounting.

It does not yet support the following AFS features:

(*) Write support.
(*) Local caching (via fscache).

(*) Local caching.
It does not yet support the following AFS features:

(*) pioctl() system call.

Expand All @@ -56,7 +54,7 @@ They permit the debugging messages to be turned on dynamically by manipulating
the masks in the following files:

/sys/module/af_rxrpc/parameters/debug
/sys/module/afs/parameters/debug
/sys/module/kafs/parameters/debug


=====
Expand All @@ -66,9 +64,9 @@ USAGE
When inserting the driver modules the root cell must be specified along with a
list of volume location server IP addresses:

insmod af_rxrpc.o
insmod rxkad.o
insmod kafs.o rootcell=cambridge.redhat.com:172.16.18.73:172.16.18.91
modprobe af_rxrpc
modprobe rxkad
modprobe kafs rootcell=cambridge.redhat.com:172.16.18.73:172.16.18.91

The first module is the AF_RXRPC network protocol driver. This provides the
RxRPC remote operation protocol and may also be accessed from userspace. See:
Expand All @@ -81,7 +79,7 @@ is the actual filesystem driver for the AFS filesystem.
Once the module has been loaded, more modules can be added by the following
procedure:

echo add grand.central.org 18.7.14.88:128.2.191.224 >/proc/fs/afs/cells
echo add grand.central.org 18.9.48.14:128.2.203.61:130.237.48.87 >/proc/fs/afs/cells

Where the parameters to the "add" command are the name of a cell and a list of
volume location servers within that cell, with the latter separated by colons.
Expand All @@ -101,7 +99,7 @@ The name of the volume can be suffixes with ".backup" or ".readonly" to
specify connection to only volumes of those types.

The name of the cell is optional, and if not given during a mount, then the
named volume will be looked up in the cell specified during insmod.
named volume will be looked up in the cell specified during modprobe.

Additional cells can be added through /proc (see later section).

Expand Down Expand Up @@ -163,14 +161,14 @@ THE CELL DATABASE

The filesystem maintains an internal database of all the cells it knows and the
IP addresses of the volume location servers for those cells. The cell to which
the system belongs is added to the database when insmod is performed by the
the system belongs is added to the database when modprobe is performed by the
"rootcell=" argument or, if compiled in, using a "kafs.rootcell=" argument on
the kernel command line.

Further cells can be added by commands similar to the following:

echo add CELLNAME VLADDR[:VLADDR][:VLADDR]... >/proc/fs/afs/cells
echo add grand.central.org 18.7.14.88:128.2.191.224 >/proc/fs/afs/cells
echo add grand.central.org 18.9.48.14:128.2.203.61:130.237.48.87 >/proc/fs/afs/cells

No other cell database operations are available at this time.

Expand Down Expand Up @@ -233,7 +231,7 @@ insmod /tmp/kafs.o rootcell=cambridge.redhat.com:172.16.18.91
mount -t afs \%root.afs. /afs
mount -t afs \%cambridge.redhat.com:root.cell. /afs/cambridge.redhat.com/

echo add grand.central.org 18.7.14.88:128.2.191.224 > /proc/fs/afs/cells
echo add grand.central.org 18.9.48.14:128.2.203.61:130.237.48.87 > /proc/fs/afs/cells
mount -t afs "#grand.central.org:root.cell." /afs/grand.central.org/
mount -t afs "#grand.central.org:root.archive." /afs/grand.central.org/archive
mount -t afs "#grand.central.org:root.contrib." /afs/grand.central.org/contrib
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15 changes: 5 additions & 10 deletions trunk/Documentation/filesystems/proc.txt
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Expand Up @@ -1167,13 +1167,11 @@ CHAPTER 3: PER-PROCESS PARAMETERS
3.1 /proc/<pid>/oom_adj - Adjust the oom-killer score
------------------------------------------------------

This file can be used to adjust the score used to select which processes should
be killed in an out-of-memory situation. The oom_adj value is a characteristic
of the task's mm, so all threads that share an mm with pid will have the same
oom_adj value. A high value will increase the likelihood of this process being
killed by the oom-killer. Valid values are in the range -16 to +15 as
explained below and a special value of -17, which disables oom-killing
altogether for threads sharing pid's mm.
This file can be used to adjust the score used to select which processes
should be killed in an out-of-memory situation. Giving it a high score will
increase the likelihood of this process being killed by the oom-killer. Valid
values are in the range -16 to +15, plus the special value -17, which disables
oom-killing altogether for this process.

The process to be killed in an out-of-memory situation is selected among all others
based on its badness score. This value equals the original memory size of the process
Expand All @@ -1187,9 +1185,6 @@ the parent's score if they do not share the same memory. Thus forking servers
are the prime candidates to be killed. Having only one 'hungry' child will make
parent less preferable than the child.

/proc/<pid>/oom_adj cannot be changed for kthreads since they are immune from
oom-killing already.

/proc/<pid>/oom_score shows process' current badness score.

The following heuristics are then applied:
Expand Down
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