Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Wed, 2 Jan 2002 18:55:04 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 2 Jan 2002 18:54:42 -0500 Received: from laweleka.austria.eu.net ([193.154.160.152]:62365 "EHLO laweleka.austria.eu.net") by vger.kernel.org with ESMTP id ; Wed, 2 Jan 2002 18:53:14 -0500 Subject: Re: i686 SMP systems with more then 12 GB ram with 2.4.x kernel ? From: Harald Holzer To: "linux-kernel@vger.kernel.org" Cc: "Timothy D. Witham" In-Reply-To: <1009995669.1253.17.camel@wookie-laptop.pdx.osdl.net> In-Reply-To: <1009649897.12942.2.camel@hh2.hhhome.at> <1009992652.1249.11.camel@wookie-laptop.pdx.osdl.net> <1009994687.12942.14.camel@hh2.hhhome.at> <1009995669.1253.17.camel@wookie-laptop.pdx.osdl.net> Content-Type: text/plain Content-Transfer-Encoding: 7bit X-Mailer: Evolution/1.0 (Preview Release) Date: 03 Jan 2002 00:50:50 +0100 Message-Id: <1010015450.15492.19.camel@hh2.hhhome.at> Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Today i checked some memory configurations and noticed that the low memory decreases, when i add more memory to the system, and the size of reserved memory increases: at 1GB ram, are 16,936kB low mem reserved. 4GB ram, 72,824kB reserved 8GB ram, 142,332kB reserved 16GB ram, 269,424kB reserved 32GB ram, 532,080kB reserved, usable low mem: 352 MB 64GB ram ?? Which function does the reserved memory fulfill ? Is it all for paging ? Harald Holzer Memory related startup messages at 32GB: Jan 1 15:56:05 localhost kernel: Linux version 2.4.17-64g (root@bigbox) (gcc version 2.96 20000731 (Red Hat Linux 7.1 2.96-98)) #1 SMP Tue Jan 1 14:19:36 CET 2002 Jan 1 15:56:05 localhost kernel: BIOS-provided physical RAM map: Jan 1 15:56:05 localhost kernel: BIOS-e820: 0000000000000000 - 000000000009d800 (usable) Jan 1 15:56:05 localhost kernel: BIOS-e820: 000000000009d800 - 00000000000a0000 (reserved) Jan 1 15:56:05 localhost kernel: BIOS-e820: 00000000000e0000 - 0000000000100000 (reserved) Jan 1 15:56:05 localhost kernel: BIOS-e820: 0000000000100000 - 0000000003ff8000 (usable) Jan 1 15:56:05 localhost kernel: BIOS-e820: 0000000003ff8000 - 0000000003fffc00 (ACPI data) Jan 1 15:56:05 localhost kernel: BIOS-e820: 0000000003fffc00 - 0000000004000000 (ACPI NVS) Jan 1 15:56:05 localhost kernel: BIOS-e820: 0000000004000000 - 00000000f0000000 (usable) Jan 1 15:56:05 localhost kernel: BIOS-e820: 00000000fec00000 - 0000000100000000 (reserved) Jan 1 15:56:05 localhost kernel: BIOS-e820: 0000000100000000 - 0000000810000000 (usable) Jan 1 15:56:05 localhost kernel: 32128MB HIGHMEM available. Jan 1 15:56:05 localhost kernel: found SMP MP-table at 000f65d0 Jan 1 15:56:05 localhost kernel: hm, page 000f6000 reserved twice. Jan 1 15:56:05 localhost kernel: hm, page 000f7000 reserved twice. Jan 1 15:56:05 localhost kernel: hm, page 0009d000 reserved twice. Jan 1 15:56:05 localhost kernel: hm, page 0009e000 reserved twice. Jan 1 15:56:05 localhost kernel: On node 0 totalpages: 8454144 Jan 1 15:56:05 localhost kernel: zone(0): 4096 pages. Jan 1 15:56:05 localhost kernel: zone(1): 225280 pages. Jan 1 15:56:05 localhost kernel: zone(2): 8224768 pages. Jan 1 15:56:05 localhost kernel: Intel MultiProcessor Specification v1.4 Jan 1 15:56:05 localhost kernel: Virtual Wire compatibility mode. Jan 1 15:56:05 localhost kernel: OEM ID: INTEL Product ID: SPM8 APIC at: 0xFEE00000 Jan 1 15:56:05 localhost kernel: Processor #7 Pentium(tm) Pro APIC version 17 Jan 1 15:56:05 localhost kernel: Processor #0 Pentium(tm) Pro APIC version 17 Jan 1 15:56:05 localhost kernel: Processor #1 Pentium(tm) Pro APIC version 17 Jan 1 15:56:05 localhost kernel: Processor #2 Pentium(tm) Pro APIC version 17 Jan 1 15:56:05 localhost kernel: Processor #3 Pentium(tm) Pro APIC version 17 Jan 1 15:56:05 localhost kernel: Processor #4 Pentium(tm) Pro APIC version 17 Jan 1 15:56:05 localhost kernel: Processor #5 Pentium(tm) Pro APIC version 17 Jan 1 15:56:05 localhost kernel: Processor #6 Pentium(tm) Pro APIC version 17 Jan 1 15:56:05 localhost kernel: I/O APIC #8 Version 19 at 0xFEC00000. Jan 1 15:56:05 localhost kernel: Processors: 8 Jan 1 15:56:05 localhost kernel: Kernel command line: BOOT_IMAGE=linux-17-64g ro root=802 BOOT_FILE=/boot/vmlinuz-2.4.17-64g console=ttyS0,38400 Jan 1 15:56:05 localhost kernel: Initializing CPU#0 Jan 1 15:56:05 localhost kernel: Detected 700.082 MHz processor. Jan 1 15:56:05 localhost kernel: Console: colour VGA+ 80x25 Jan 1 15:56:05 localhost kernel: Calibrating delay loop... 1395.91 BogoMIPS -->Jan 1 15:56:05 localhost kernel: Memory: 33021924k/33816576k available (1081k kernel code, 532080k reserved, 290k data, 248k init, 32636928k highmem) Jan 1 15:56:05 localhost kernel: Dentry-cache hash table entries: 262144 (order: 9, 2097152 bytes) Jan 1 15:56:05 localhost kernel: Inode-cache hash table entries: 262144 (order: 9, 2097152 bytes) Jan 1 15:56:05 localhost kernel: Mount-cache hash table entries: 262144 (order: 9, 2097152 bytes) Jan 1 15:56:05 localhost kernel: Buffer-cache hash table entries: 524288 (order: 9, 2097152 bytes) Jan 1 15:56:05 localhost kernel: Page-cache hash table entries: 524288 (order: 9, 2097152 bytes) - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/