Fedora kernel-2.6.17-1.2142_FC4 patched with stable patch-2.6.17.4-vs2.0.2-rc26.diff

[linux-2.6.git] / Documentation / sysctl / kernel.txt

diff --git a/Documentation/sysctl/kernel.txt b/Documentation/sysctl/kernel.txt
index 9a193fc..b0c7ab9 100644 (file)
--- a/Documentation/sysctl/kernel.txt
+++ b/Documentation/sysctl/kernel.txt
@@ -16,6 +16,7 @@ before actually making adjustments.
 
 Currently, these files might (depending on your configuration)
 show up in /proc/sys/kernel:
+- acpi_video_flags
 - acct
 - core_pattern
 - core_uses_pid
@@ -23,7 +24,6 @@ show up in /proc/sys/kernel:
 - dentry-state
 - domainname
 - hostname
-- htab-reclaim                [ PPC only ]
 - hotplug
 - java-appletviewer           [ binfmt_java, obsolete ]
 - java-interpreter            [ binfmt_java, obsolete ]
@@ -50,11 +50,20 @@ show up in /proc/sys/kernel:
 - shmmax                      [ sysv ipc ]
 - shmmni
 - stop-a                      [ SPARC only ]
+- suid_dumpable
 - sysrq                       ==> Documentation/sysrq.txt
 - tainted
 - threads-max
 - version
-- zero-paged                  [ PPC only ]
+
+==============================================================
+
+acpi_video_flags:
+
+flags
+
+See Doc*/kernel/power/video.txt, it allows mode of video boot to be
+set during run time.
 
 ==============================================================
 
@@ -133,8 +142,8 @@ domainname and hostname, i.e.:
 # echo "darkstar" > /proc/sys/kernel/hostname
 # echo "mydomain" > /proc/sys/kernel/domainname
 has the same effect as
-# hostname "darkstar" > /proc/sys/kernel/hostname
-# domainname "mydomain" > /proc/sys/kernel/domainname
+# hostname "darkstar"
+# domainname "mydomain"
 
 Note, however, that the classic darkstar.frop.org has the
 hostname "darkstar" and DNS (Internet Domain Name Server)
@@ -145,14 +154,6 @@ see the hostname(1) man page.
 
 ==============================================================
 
-htab-reclaim: (PPC only)
-
-Setting this to a non-zero value, the PowerPC htab
-(see Documentation/powerpc/ppc_htab.txt) is pruned
-each time the system hits the idle loop.
- 
-==============================================================
-
 hotplug:
 
 Path for the hotplug policy agent.
@@ -310,6 +311,25 @@ kernel.  This value defaults to SHMMAX.
 
 ==============================================================
 
+suid_dumpable:
+
+This value can be used to query and set the core dump mode for setuid
+or otherwise protected/tainted binaries. The modes are
+
+0 - (default) - traditional behaviour. Any process which has changed
+       privilege levels or is execute only will not be dumped
+1 - (debug) - all processes dump core when possible. The core dump is
+       owned by the current user and no security is applied. This is
+       intended for system debugging situations only. Ptrace is unchecked.
+2 - (suidsafe) - any binary which normally would not be dumped is dumped
+       readable by root only. This allows the end user to remove
+       such a dump but not access it directly. For security reasons
+       core dumps in this mode will not overwrite one another or
+       other files. This mode is appropriate when adminstrators are
+       attempting to debug problems in a normal environment.
+
+==============================================================
+
 tainted: 
 
 Non-zero if the kernel has been tainted.  Numeric values, which
@@ -322,11 +342,3 @@ can be ORed together:
       Set by modutils >= 2.4.9 and module-init-tools.
   4 - Unsafe SMP processors: SMP with CPUs not designed for SMP.
 
-==============================================================
-
-zero-paged: (PPC only)
-
-When enabled (non-zero), Linux-PPC will pre-zero pages in
-the idle loop, possibly speeding up get_free_pages. Since
-this only affects what the idle loop is doing, you should
-enable this and see if anything changes.