[syslinux] Breaking the 256 command line limit

[Jim Cromie]

Andrew Lambe wrote:

>I'm building pxe-booted kiosk systems using pxelinux 3.09 and linux
>kernel 2.6.14.  I noticed a discussion on this list that 3.09 supports a
>511 character command line but that the kernel would need to be patched
>to access it beyond 255.  How can I patch the kernel to do so?
>
>Andrew Lambe
>Systems Programmer
>Information Technology
>Oral Roberts University
>Tulsa, Oklahoma
>  
>


this worked for me a while back.  havent tried lately

more patch-i386-1024-11
diff -ru linux-2.6.11/include/asm-i386/param.h 
linux-2.6.11-mod/include/asm-i386/param.h
--- linux-2.6.11/include/asm-i386/param.h       2005-03-02 
00:37:49.000000000 -0700
+++ linux-2.6.11-mod/include/asm-i386/param.h   2005-06-11 
06:37:47.000000000 -0600
@@ -18,6 +18,6 @@
 #endif

 #define MAXHOSTNAMELEN 64      /* max length of hostname */
-#define COMMAND_LINE_SIZE 256
+#define COMMAND_LINE_SIZE 1024

 #endif
Only in linux-2.6.11-mod/include/asm-i386: param.h.orig
diff -ru linux-2.6.11/include/asm-i386/setup.h 
linux-2.6.11-mod/include/asm-i386/setup.h
--- linux-2.6.11/include/asm-i386/setup.h       2005-03-02 
00:38:13.000000000 -0700
+++ linux-2.6.11-mod/include/asm-i386/setup.h   2005-06-11 
06:41:15.000000000 -0600
@@ -17,7 +17,7 @@
 #define MAX_NONPAE_PFN (1 << 20)

 #define PARAM_SIZE 2048
-#define COMMAND_LINE_SIZE 256
+#define COMMAND_LINE_SIZE 1024

 #define OLD_CL_MAGIC_ADDR      0x90020
 #define OLD_CL_MAGIC           0xA33F
Only in linux-2.6.11-mod/include/asm-i386: setup.h~
[jimc at harpo lxbuild]$