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-rw-r--r--Documentation/sysrq.txt5
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/sysrq.txt b/Documentation/sysrq.txt
index 535aeb936dbc..cf42b820ff9d 100644
--- a/Documentation/sysrq.txt
+++ b/Documentation/sysrq.txt
@@ -81,6 +81,8 @@ On all - write a character to /proc/sysrq-trigger. e.g.:
'i' - Send a SIGKILL to all processes, except for init.
+'j' - Forcibly "Just thaw it" - filesystems frozen by the FIFREEZE ioctl.
+
'k' - Secure Access Key (SAK) Kills all programs on the current virtual
console. NOTE: See important comments below in SAK section.
@@ -162,6 +164,9 @@ t'E'rm and k'I'll are useful if you have some sort of runaway process you
are unable to kill any other way, especially if it's spawning other
processes.
+"'J'ust thaw it" is useful if your system becomes unresponsive due to a frozen
+(probably root) filesystem via the FIFREEZE ioctl.
+
* Sometimes SysRq seems to get 'stuck' after using it, what can I do?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
That happens to me, also. I've found that tapping shift, alt, and control