[CPUFREQ] Documentation: Add Blackfin to list of supported processors

[linux-2.6-omap-h63xx.git] / Documentation / sysctl / fs.txt

diff --git a/Documentation/sysctl/fs.txt b/Documentation/sysctl/fs.txt
index 0b62c62142cf9023c27e04c83b417f675b917587..f99254327ae59b59971d979b38cc083d3ac096e5 100644 (file)
--- a/Documentation/sysctl/fs.txt
+++ b/Documentation/sysctl/fs.txt
@@ -23,8 +23,10 @@ Currently, these files are in /proc/sys/fs:
 - inode-max
 - inode-nr
 - inode-state
+- nr_open
 - overflowuid
 - overflowgid
+- suid_dumpable
 - super-max
 - super-nr
 
@@ -90,6 +92,15 @@ usage of file handles and you don't need to increase the maximum.
 
 ==============================================================
 
+nr_open:
+
+This denotes the maximum number of file-handles a process can
+allocate. Default value is 1024*1024 (1048576) which should be
+enough for most machines. Actual limit depends on RLIMIT_NOFILE
+resource limit.
+
+==============================================================
+
 inode-max, inode-nr & inode-state:
 
 As with file handles, the kernel allocates the inode structures
@@ -131,6 +142,25 @@ The default is 65534.
 
 ==============================================================
 
+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 administrators are
+       attempting to debug problems in a normal environment.
+
+==============================================================
+
 super-max & super-nr:
 
 These numbers control the maximum number of superblocks, and