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[Xen-users] System-RAM: 3325MB question

To: xen-users Mailinglist <xen-users@xxxxxxxxxxxxxxxxxxx>
Subject: [Xen-users] System-RAM: 3325MB question
From: Frank Schubert <schubert@xxxxxxxxxxxx>
Date: Fri, 28 Apr 2006 10:47:08 +0200
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Hi,

first I want to send many thanks to the Xen developers and to this list.

Here's my question:
Today i upgraded a server to 4GB RAM but Xen only shows 3325MB RAM?:

 Xen version 3.0.2-2 (xenod@xxxxxxxxxxxx) (gcc version 3.3.3 20040412 (Red Hat
Linux 3.3.3-7)) Thu Apr 13 17:34:06 BST 2006
 Latest ChangeSet: Thu Apr 13 15:18:37 2006 +0100 9617:5802713c159b

(XEN) Physical RAM map:
(XEN)  0000000000000000 - 000000000009fc00 (usable)
(XEN)  000000000009fc00 - 00000000000a0000 (reserved)
(XEN)  00000000000e8000 - 0000000000100000 (reserved)
(XEN)  0000000000100000 - 00000000cfe30000 (usable)
(XEN)  00000000cfe30000 - 00000000cfe40000 (ACPI data)
(XEN)  00000000cfe40000 - 00000000cfef0000 (ACPI NVS)
(XEN)  00000000cfef0000 - 00000000cff00000 (reserved)
(XEN)  00000000ffb80000 - 0000000100000000 (reserved)
(XEN) System RAM: 3325MB (3405628kB)
(XEN) Xen heap: 10MB (10532kB)
(XEN) Using scheduler: Simple EDF Scheduler (sedf)
(XEN) PAE disabled.
(XEN) found SMP MP-table at 000ff780
(XEN) DMI 2.3 present.
(XEN) Using APIC driver default
(XEN) ACPI: RSDP (v002 ACPIAM                                ) @ 0x000f9e60
(XEN) ACPI: XSDT (v001 A M I  OEMXSDT  0x09000302 MSFT 0x00000097) @ 0xcfe30100
(XEN) ACPI: FADT (v003 A M I  OEMFACP  0x09000302 MSFT 0x00000097) @ 0xcfe30290
(XEN) ACPI: MADT (v001 A M I  OEMAPIC  0x09000302 MSFT 0x00000097) @ 0xcfe30390
(XEN) ACPI: OEMB (v001 A M I  OEMBIOS  0x09000302 MSFT 0x00000097) @ 0xcfe40040
(XEN) ACPI: DSDT (v001  P4CED P4CED091 0x00000091 INTL 0x02002026) @ 0x00000000
(XEN) ACPI: Local APIC address 0xfee00000
(XEN) ACPI: LAPIC (acpi_id[0x01] lapic_id[0x00] enabled)
(XEN) Processor #0 15:2 APIC version 20
(XEN) ACPI: LAPIC (acpi_id[0x02] lapic_id[0x01] enabled)
(XEN) Processor #1 15:2 APIC version 20
(XEN) ACPI: IOAPIC (id[0x02] address[0xfec00000] gsi_base[0])
(XEN) IOAPIC[0]: apic_id 2, version 32, address 0xfec00000, GSI 0-23
(XEN) ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
(XEN) ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
(XEN) ACPI: IRQ0 used by override.
(XEN) ACPI: IRQ2 used by override.
(XEN) ACPI: IRQ9 used by override.
(XEN) Enabling APIC mode:  Flat.  Using 1 I/O APICs
(XEN) Using ACPI (MADT) for SMP configuration information
(XEN) Initializing CPU#0
(XEN) Detected 2598.808 MHz processor.
(XEN) CPU: Trace cache: 12K uops, L1 D cache: 8K
(XEN) CPU: L2 cache: 512K
(XEN) CPU: Physical Processor ID: 0
(XEN) Intel machine check architecture supported.
(XEN) Intel machine check reporting enabled on CPU#0.
(XEN) CPU0: Intel P4/Xeon Extended MCE MSRs (12) available
(XEN) CPU0: Thermal monitoring enabled
(XEN) CPU0: Intel(R) Pentium(R) 4 CPU 2.60GHz stepping 09
(XEN) Booting processor 1/1 eip 90000
(XEN) Initializing CPU#1
(XEN) CPU: Trace cache: 12K uops, L1 D cache: 8K
(XEN) CPU: L2 cache: 512K
(XEN) CPU: Physical Processor ID: 0
(XEN) Intel machine check architecture supported.
(XEN) Intel machine check reporting enabled on CPU#1.
(XEN) CPU1: Intel P4/Xeon Extended MCE MSRs (12) available
(XEN) CPU1: Thermal monitoring enabled
(XEN) CPU1: Intel(R) Pentium(R) 4 CPU 2.60GHz stepping 09
(XEN) Total of 2 processors activated.
(XEN) ENABLING IO-APIC IRQs
(XEN) ..TIMER: vector=0x31 apic1=0 pin1=2 apic2=-1 pin2=-1
(XEN) checking TSC synchronization across 2 CPUs: passed.
(XEN) Platform timer is 1.193MHz PIT
(XEN) Brought up 2 CPUs
(XEN) Machine check exception polling timer started.
(XEN) Using IPI Shortcut mode
(XEN) *** LOADING DOMAIN 0 ***
(XEN) Domain 0 kernel supports features = { 0000001f }.
(XEN) Domain 0 kernel requires features = { 00000000 }.
(XEN) PHYSICAL MEMORY ARRANGEMENT:
(XEN)  Dom0 alloc.:   03000000->04000000 (28654 pages to be allocated)
(XEN) VIRTUAL MEMORY ARRANGEMENT:
(XEN)  Loaded kernel: c0100000->c044a254
(XEN)  Init. ramdisk: c044b000->c08e4000
(XEN)  Phys-Mach map: c08e4000->c0903fb8
(XEN)  Start info:    c0904000->c0905000
(XEN)  Page tables:   c0905000->c0909000
(XEN)  Boot stack:    c0909000->c090a000
(XEN)  TOTAL:         c0000000->c0c00000
(XEN)  ENTRY ADDRESS: c0100000
(XEN) Dom0 has maximum 2 VCPUs
(XEN) Initrd len 0x499000, start at 0xc044b000
(XEN) Scrubbing Free RAM: ..................................done.
(XEN) Xen trace buffers: disabled


Do i already need PAE extension for this?
(I thought PAE is only needed if i want more than 4GB.)

Thank you in advance,
Frank Schubert

-- 
Frank Schubert
Systemadministration
EsPresto AG
Breite Str. 30-31
10178 Berlin/Germany
Tel: +49.(0)30.90 226.750
Fax: +49.(0)30.90 226.760
f.schubert@xxxxxxxxxxxx

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