diff --git a/Documentation/sysctl/kernel.txt b/Documentation/sysctl/kernel.txt
index 89bf8c2..0bc7f1e 100644
--- a/Documentation/sysctl/kernel.txt
+++ b/Documentation/sysctl/kernel.txt
@@ -86,7 +86,7 @@
 core_pattern:
 
 core_pattern is used to specify a core dumpfile pattern name.
-. max length 64 characters; default value is "core"
+. max length 128 characters; default value is "core"
 . core_pattern is used as a pattern template for the output filename;
   certain string patterns (beginning with '%') are substituted with
   their actual values.
@@ -105,6 +105,9 @@
 	%h	hostname
 	%e	executable filename
 	%<OTHER> both are dropped
+. If the first character of the pattern is a '|', the kernel will treat
+  the rest of the pattern as a command to run.  The core dump will be
+  written to the standard input of that program instead of to a file.
 
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