Date: Tue, 22 Jul 1997 01:14:22 -0700 From: David Greenman <dg@root.com> To: Jim Dixon <jdd@vbc.net> Cc: hackers@FreeBSD.ORG Subject: Re: MAX physical memory for FreeBSD ? Message-ID: <199707220814.BAA12568@implode.root.com> In-Reply-To: Your message of "Tue, 22 Jul 1997 07:31:16 BST." <Pine.BSI.3.91.970722072939.25642Y-100000@avon-gw.uk1.vbc.net>
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>> There isn't any specific limit, but some kernel parameters need to be
>> tweaked before more than 256MB can be used.
>
>Which? We have a machine (a root name server) that needs to be brought
>up to 512 MB urgently.
Ugh. Actually, the kernel virtual address space must be increased and this
requires, in addition to changing some kernel parameters (which are hardcoded
in a couple of source files), that you do a "make world" to fix certain
kernel start address assumptions that are in some of the system utilities.
Patches attached. Note that the process limit increases aren't strictly
necessary, but are probably desired.
-DG
David Greenman
Core-team/Principal Architect, The FreeBSD Project
Index: i386/conf/Makefile.i386
===================================================================
RCS file: /home/ncvs/src/sys/i386/conf/Makefile.i386,v
retrieving revision 1.89.2.3
diff -c -r1.89.2.3 Makefile.i386
*** Makefile.i386 1997/06/29 16:44:41 1.89.2.3
--- Makefile.i386 1997/07/02 08:56:28
***************
*** 36,42 ****
.endif
COPTS= ${INCLUDES} ${IDENT} -DKERNEL
CFLAGS= ${COPTFLAGS} ${CWARNFLAGS} ${DEBUG} ${COPTS}
! LOAD_ADDRESS?= F0100000
.if defined(PROF)
CFLAGS+= -malign-functions=4
.if ${PROFLEVEL} >= 2
--- 36,42 ----
.endif
COPTS= ${INCLUDES} ${IDENT} -DKERNEL
CFLAGS= ${COPTFLAGS} ${CWARNFLAGS} ${DEBUG} ${COPTS}
! LOAD_ADDRESS?= E0100000
.if defined(PROF)
CFLAGS+= -malign-functions=4
.if ${PROFLEVEL} >= 2
Index: i386/include/pmap.h
===================================================================
RCS file: /home/ncvs/src/sys/i386/include/pmap.h,v
retrieving revision 1.46
diff -c -r1.46 pmap.h
*** pmap.h 1996/10/13 03:14:57 1.46
--- pmap.h 1997/04/07 08:12:53
***************
*** 91,97 ****
#define NKPT 9 /* actual number of kernel page tables */
#endif
#ifndef NKPDE
! #define NKPDE 63 /* addressable number of page tables/pde's */
#endif
/*
--- 91,97 ----
#define NKPT 9 /* actual number of kernel page tables */
#endif
#ifndef NKPDE
! #define NKPDE 127 /* addressable number of page tables/pde's */
#endif
/*
Index: i386/include/vmparam.h
===================================================================
RCS file: /home/ncvs/src/sys/i386/include/vmparam.h,v
retrieving revision 1.21.2.1
diff -c -r1.21.2.1 vmparam.h
*** vmparam.h 1997/03/25 04:54:02 1.21.2.1
--- vmparam.h 1997/04/07 08:12:53
***************
*** 52,67 ****
*/
#define MAXTSIZ (16UL*1024*1024) /* max text size */
#ifndef DFLDSIZ
! #define DFLDSIZ (64UL*1024*1024) /* initial data size limit */
#endif
#ifndef MAXDSIZ
! #define MAXDSIZ (128UL*1024*1024) /* max data size */
#endif
#ifndef DFLSSIZ
#define DFLSSIZ (8UL*1024*1024) /* initial stack size limit */
#endif
#ifndef MAXSSIZ
! #define MAXSSIZ (64UL*1024*1024) /* max stack size */
#endif
#ifndef SGROWSIZ
#define SGROWSIZ (128UL*1024) /* amount to grow stack */
--- 52,67 ----
*/
#define MAXTSIZ (16UL*1024*1024) /* max text size */
#ifndef DFLDSIZ
! #define DFLDSIZ (256UL*1024*1024) /* initial data size limit */
#endif
#ifndef MAXDSIZ
! #define MAXDSIZ (256UL*1024*1024) /* max data size */
#endif
#ifndef DFLSSIZ
#define DFLSSIZ (8UL*1024*1024) /* initial stack size limit */
#endif
#ifndef MAXSSIZ
! #define MAXSSIZ (128UL*1024*1024) /* max stack size */
#endif
#ifndef SGROWSIZ
#define SGROWSIZ (128UL*1024) /* amount to grow stack */
***************
*** 114,120 ****
#define VM_MIN_ADDRESS ((vm_offset_t)0)
/* virtual sizes (bytes) for various kernel submaps */
! #define VM_KMEM_SIZE (32 * 1024 * 1024)
/* read and exec are the same thing */
#define VM_PROT_READ_IS_EXEC
--- 114,120 ----
#define VM_MIN_ADDRESS ((vm_offset_t)0)
/* virtual sizes (bytes) for various kernel submaps */
! #define VM_KMEM_SIZE (96 * 1024 * 1024)
/* read and exec are the same thing */
#define VM_PROT_READ_IS_EXEC
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