options MSGBUFSIZE=

[Julian Coleman <jdc%coris.org.uk@localhost>]

Hi,

Setting "options MSGBUFSIZE" currently causes a compilation error because
MSGBUFSIZE is defined (but unused).  The attached allows MSGBUFSIZE to be
increased to 248K (253952).  Included are points that mrg@ mentioned -
AUXREG_VA and TMPMAP_VA aren't used on sparc64, and INTSTACK has been moved
by 192K (out of nearly 256M).

Comments?

Thanks,

J

PS.  I needed this because increasing the values of the USB-related debug
variables easily overruns 32K at boot.
-- 
  My other computer also runs NetBSD    /        Sailing at Newbiggin
        http://www.netbsd.org/        /   http://www.newbigginsailingclub.org/

--- src/sys/arch/sparc64/include/param.h.dist   2014-02-24 09:11:52.000000000 
+0000
+++ src/sys/arch/sparc64/include/param.h        2014-03-26 20:52:32.000000000 
+0000
@@ -168,13 +168,12 @@
 
 #define        _MAXNBPG        8192    /* fixed VAs, independent of actual 
NBPG */
 
-#define        AUXREG_VA       (      KERNEND + _MAXNBPG) /* 1 page REDZONE */
-#define        TMPMAP_VA       (    AUXREG_VA + _MAXNBPG)
-#define        MSGBUF_VA       (    TMPMAP_VA + _MAXNBPG)
+#define        MSGBUF_VA       (      KERNEND + _MAXNBPG) /* 1 page REDZONE */
 /*
+ * Maximum message buffer size is 192k.
  * Here's the location of the interrupt stack and CPU structure.
  */
-#define        INTSTACK        (      KERNEND + 8*_MAXNBPG)
+#define        INTSTACK        (      KERNEND + 32*_MAXNBPG)
 #define        EINTSTACK       (     INTSTACK + 4*_MAXNBPG)
 #define        CPUINFO_VA      (    EINTSTACK              )
 #define        PANICSTACK      (     INTSTACK + 8*_MAXNBPG)
@@ -197,7 +196,13 @@
 
 #define        MCLBYTES        (1 << MCLSHIFT) /* size of a m_buf cluster */
 
-#define MSGBUFSIZE     NBPG
+#if !defined (MSGBUFSIZE)              /* options MSGBUFSIZE=integer   */
+#define MSGBUFSIZE     4 * NBPG
+#else
+#if INTSTACK - MSGBUF_VA - MSGBUFSIZE < 0
+#error MSGBUFSIZE is too large
+#endif
+#endif
 
 /*
  * Minimum size of the kernel kmem_arena in PAGE_SIZE-sized
--- src/sys/arch/sparc64/sparc64/pmap.c.dist    2014-01-09 22:29:26.000000000 
+0000
+++ src/sys/arch/sparc64/sparc64/pmap.c 2014-03-26 20:57:29.000000000 +0000
@@ -741,8 +741,7 @@
         * Get hold or the message buffer.
         */
        msgbufp = (struct kern_msgbuf *)(vaddr_t)MSGBUF_VA;
-/* XXXXX -- increase msgbufsiz for uvmhist printing */
-       msgbufsiz = 4*PAGE_SIZE /* round_page(sizeof(struct msgbuf)) */;
+       msgbufsiz = MSGBUFSIZE /* round_page(sizeof(struct msgbuf)) */;
        BDPRINTF(PDB_BOOT, ("Trying to allocate msgbuf at %lx, size %lx\n",
                            (long)msgbufp, (long)msgbufsiz));
        if ((long)msgbufp !=