Small textdump enhancements.

Allow textdumps to be called explicitly from DDB.

If "dump" is called in DDB and textdumps are enabled then abort the
dump and tell the user to turn off textdumps.

Add options TEXTDUMP_PREFERRED to turn textdumps on by default.
Add options TEXTDUMP_VERBOSE to be a bit more verbose while textdumping.

Reviewed by: rwatson

MFC after:	2 weeks

1 files changed, 4 insertions, 0 deletions

diff --git a/share/man/man4/ddb.4 b/share/man/man4/ddb.4
index cefa7dd4f6ac..c1751552b007 100644
--- a/share/man/man4/ddb.4
+++ b/share/man/man4/ddb.4
@@ -1176,6 +1176,7 @@ section for more information on the scripting facility.
 .It Ic textdump set
 .It Ic textdump status
 .It Ic textdump unset
+.It Ic textdump dump
 The
 .Ic textdump set
 command may be used to force the next kernel core dump to be a textdump
@@ -1184,6 +1185,9 @@ rather than a traditional memory dump or minidump.
 reports whether a textdump has been scheduled.
 .Ic textdump unset
 cancels a request to perform a textdump as the next kernel core dump.
+Use the 
+.Ic textdump dump
+command to immediately perform a textdump.
 More information may be found in
 .Xr textdump 4 .
 .El