Date: Mon, 24 Dec 2007 17:21:32 -0500 From: Robert Fitzpatrick <lists@webtent.net> To: FreeBSD <freebsd-questions@freebsd.org> Subject: 4GB memory and more Message-ID: <1198534892.11590.8.camel@columbus.webtent.org>
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I have a couple of Supermicro servers and upgraded both with more memory. I upgraded our ESMTP server from 1GB to 4GB and our MX server from 2GB to 5GB. Below are the dmesg memory findings and, yes, I get the memory over 4GB ignored when booting up. The ESMTP even says that about 130MB is ignored. I was reading about building into the kernel PAE options for using above 4GB of memory, but in the dmesg I see PAE in the Features. Does this mean the support is there and I just need some BIOS tweaking? esmtp# dmesg Copyright (c) 1992-2005 The FreeBSD Project. Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994 The Regents of the University of California. All rights reserved. FreeBSD 5.4-RELEASE #1: Tue Dec 13 16:00:53 EST 2005 admin@esmtp.webtent.net:/usr/src/sys/i386/compile/WEBTENT Timecounter "i8254" frequency 1193182 Hz quality 0 CPU: Intel(R) Xeon(TM) CPU 2.40GHz (2399.33-MHz 686-class CPU) Origin = "GenuineIntel" Id = 0xf25 Stepping = 5 Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE> Hyperthreading: 2 logical CPUs real memory = 4160225280 (3967 MB) avail memory = 4073279488 (3884 MB) <snip> mx1# dmesg Copyright (c) 1992-2007 The FreeBSD Project. Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994 The Regents of the University of California. All rights reserved. FreeBSD is a registered trademark of The FreeBSD Foundation. FreeBSD 6.2-RELEASE-p5 #0: Sat Jun 2 11:11:40 EDT 2007 root@mx1.webtent.net:/usr/obj/usr/src/sys/WEBTENT Timecounter "i8254" frequency 1193182 Hz quality 0 CPU: Intel(R) Xeon(TM) CPU 3.00GHz (3000.12-MHz 686-class CPU) Origin = "GenuineIntel" Id = 0xf41 Stepping = 1 Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE> Features2=0x641d<SSE3,RSVD2,MON,DS_CPL,CNTX-ID,CX16,<b14>> AMD Features=0x20100000<NX,LM> Logical CPUs per core: 2 real memory = 3220635648 (3071 MB) avail memory = 3150565376 (3004 MB) <snip> Thanks in advance. -- Robert
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