Make TTYHOG tunable.

Reviewed by:	mike (mentor)

sys/conf/NOTES

@@ -1038,6 +1038,9 @@ options 	LIBICONV
 # Size of the kernel message buffer.  Should be N * pagesize.
 options 	MSGBUF_SIZE=40960
 
+# Maximum size of a tty or pty input buffer.
+options 	TTYHOG=8193
+
 
 #####################################################################
 # HARDWARE DEVICE CONFIGURATION

sys/conf/options

@@ -141,6 +141,7 @@ SYSVSHM		opt_sysvipc.h
 VFS_AIO
 WLCACHE		opt_wavelan.h
 WLDEBUG		opt_wavelan.h
+TTYHOG		opt_tty.h
 
 # POSIX kernel options
 _KPOSIX_PRIORITY_SCHEDULING	opt_posix.h

sys/dev/dgb/dgb.c

@@ -58,6 +58,7 @@
 
 #include "opt_compat.h"
 #include "opt_dgb.h"
+#include "opt_tty.h"
 
 #include "dgb.h"
 

sys/dev/nmdm/nmdm.c

@@ -39,6 +39,8 @@
  */
 
 #include "opt_compat.h"
+#include "opt_tty.h"
+
 #include <sys/param.h>
 #include <sys/systm.h>
 #if defined(COMPAT_43) || defined(COMPAT_SUNOS)

sys/dev/rc/rc.c

@@ -35,6 +35,8 @@
 
 /*#define RCDEBUG*/
 
+#include "opt_tty.h"
+
 #include <sys/param.h>
 #include <sys/systm.h>
 #include <sys/bus.h>

sys/dev/si/si.c

@@ -41,6 +41,7 @@ static const char si_copyright1[] =  "@(#) Copyright (C) Specialix International
 
 #include "opt_compat.h"
 #include "opt_debug_si.h"
+#include "opt_tty.h"
 
 #include <sys/param.h>
 #include <sys/systm.h>

sys/i386/isa/istallion.c

@@ -39,6 +39,7 @@
 /*****************************************************************************/
 
 #include "opt_compat.h"
+#include "opt_tty.h"
 
 #define	TTYDEFCHARS	1
 

sys/i386/isa/stallion.c

@@ -41,6 +41,7 @@
 #define	TTYDEFCHARS	1
 
 #include "opt_compat.h"
+#include "opt_tty.h"
 
 #include <sys/param.h>
 #include <sys/systm.h>

sys/kern/tty.c

@@ -76,6 +76,7 @@
  */
 
 #include "opt_compat.h"
+#include "opt_tty.h"
 
 #include <sys/param.h>
 #include <sys/systm.h>

sys/kern/tty_pty.c

@@ -39,6 +39,7 @@
  * (Actually two drivers, requiring two entries in 'cdevsw')
  */
 #include "opt_compat.h"
+#include "opt_tty.h"
 #include <sys/param.h>
 #include <sys/systm.h>
 #include <sys/lock.h>

sys/modules/nmdm/Makefile

@@ -4,9 +4,12 @@
 
 KMOD=	nmdm
 SRCS=	nmdm.c
-SRCS+=	opt_compat.h vnode_if.h
+SRCS+=	opt_compat.h opt_tty.h vnode_if.h
 
 opt_compat.h:
 	echo "#define COMPAT_43 1" >opt_compat.h
 
+opt_tty.h:
+	echo "#define TTYHOG 8192" >opt_tty.h
+
 .include <bsd.kmod.mk>

sys/modules/rc/Makefile

@@ -3,6 +3,9 @@
 .PATH: ${.CURDIR}/../../dev/rc
 
 KMOD=	rc
-SRCS=	rc.c device_if.h bus_if.h isa_if.h
+SRCS=	rc.c device_if.h bus_if.h isa_if.h opt_tty.h
+
+opt_tty.h:
+	echo "#define TTYHOG 8192" >opt_tty.h
 
 .include <bsd.kmod.mk>