From Bugzilla Helper: User-Agent: Mozilla/4.0 (compatible; MSIE 5.5; Windows NT 5.0) Description of problem: Using Kernel-2.4.18-10 (bigmem, but it happens on all of em), the kernel sees an incorrect amount of memory. The system has 4096MB ECC RAM, but the system reports a total of 3720MB. Version-Release number of selected component (if applicable): How reproducible: Always Steps to Reproduce: 1.buy a Dell PowerEdge 4600 w/ 4 GB RAM 2.use any RedHat 7.3 kernel 3. Actual Results: total mem: 3901579264 Expected Results: total mem ~4294967296 Additional info: [root@marx root]# cat /proc/meminfo total: used: free: shared: buffers: cached: Mem: 3901579264 65413120 3836166144 0 9883648 16576512 Swap: 2146754560 0 2146754560 MemTotal: 3810136 kB MemFree: 3746256 kB MemShared: 0 kB Buffers: 9652 kB Cached: 16188 kB SwapCached: 0 kB Active: 31640 kB Inact_dirty: 128 kB Inact_clean: 200 kB Inact_target: 6392 kB HighTotal: 2949056 kB HighFree: 2924936 kB LowTotal: 861080 kB LowFree: 821320 kB SwapTotal: 2096440 kB SwapFree: 2096440 kB Committed_AS: 15464 kB
can you attache the first lines of "dmesg" ? (eg the e820 table) What normally happens with 4GB+ systems is that there is a "gap" in the memory just below the 4Gb range for PCI devices (since those are generally 32 bit, the gap needs to be in the first 32 bit of address space). Most chipsets/bioses just "relocate" the ram that is in this gap to above 4Gb, however not all.
here's the whole dmesg: [root@marx root]# cat /var/log/dmesg Linux version 2.4.18-10bigmem (bhcompile.redhat.com) (gcc version 2.96 20000731 (Red Hat Linux 7.3 2.96-110)) #1 SMP Wed Aug 7 10:26:52 EDT 2002 BIOS-provided physical RAM map: BIOS-e820: 0000000000000000 - 00000000000a0000 (usable) BIOS-e820: 0000000000100000 - 00000000ebff0000 (usable) BIOS-e820: 00000000ebff0000 - 00000000ebffec00 (ACPI data) BIOS-e820: 00000000ebffec00 - 00000000ebfff000 (reserved) BIOS-e820: 00000000fec00000 - 00000000fec10000 (reserved) BIOS-e820: 00000000fee00000 - 00000000fee10000 (reserved) BIOS-e820: 00000000fff80000 - 0000000100000000 (reserved) 2879MB HIGHMEM available. 896MB LOWMEM available. found SMP MP-table at 000fe710 hm, page 000fe000 reserved twice. hm, page 000ff000 reserved twice. hm, page 000f0000 reserved twice. On node 0 totalpages: 966640 zone(0): 4096 pages. zone(1): 225280 pages. zone(2): 737264 pages. ACPI: Searched entire block, no RSDP was found. ACPI: RSDP located at physical address c00fdc60 RSD PTR v0 [DELL ] __va_range(0xfdc74, 0x68): idx=8 mapped at ffff6000 ACPI table found: RSDT v1 [DELL PE4600 0.1] __va_range(0xfdca4, 0x24): idx=8 mapped at ffff6000 __va_range(0xfdca4, 0x74): idx=8 mapped at ffff6000 ACPI table found: FACP v1 [DELL PE4600 0.1] __va_range(0xfdd18, 0x24): idx=8 mapped at ffff6000 __va_range(0xfdd18, 0x88): idx=8 mapped at ffff6000 ACPI table found: APIC v1 [DELL PE4600 0.1] __va_range(0xfdd18, 0x88): idx=8 mapped at ffff6000 LAPIC (acpi_id[0x0001] id[0x0] enabled[1]) CPU 0 (0x0000) enabledProcessor #0 Pentium 4(tm) XEON(tm) APIC version 16 LAPIC (acpi_id[0x0002] id[0x2] enabled[1]) CPU 1 (0x0200) enabledProcessor #2 Pentium 4(tm) XEON(tm) APIC version 16 LAPIC (acpi_id[0x0003] id[0x1] enabled[1]) CPU 2 (0x0100) enabledProcessor #1 Pentium 4(tm) XEON(tm) APIC version 16 LAPIC (acpi_id[0x0004] id[0x3] enabled[1]) CPU 3 (0x0300) enabledProcessor #3 Pentium 4(tm) XEON(tm) APIC version 16 IOAPIC (id[0x4] address[0xfec00000] global_irq_base[0x0]) IOAPIC (id[0x5] address[0xfec01000] global_irq_base[0x10]) IOAPIC (id[0x6] address[0xfec02000] global_irq_base[0x20]) LAPIC_NMI (acpi_id[0x0001] polarity[0x1] trigger[0x1] lint[0x1]) LAPIC_NMI (acpi_id[0x0002] polarity[0x1] trigger[0x1] lint[0x1]) LAPIC_NMI (acpi_id[0x0003] polarity[0x1] trigger[0x1] lint[0x1]) LAPIC_NMI (acpi_id[0x0004] polarity[0x1] trigger[0x1] lint[0x1]) 4 CPUs total Local APIC address fee00000 __va_range(0xfdda0, 0x24): idx=8 mapped at ffff6000 __va_range(0xfdda0, 0x50): idx=8 mapped at ffff6000 ACPI table found: SPCR v1 [DELL PE4600 0.1] Enabling the CPU's according to the ACPI table Intel MultiProcessor Specification v1.4 Virtual Wire compatibility mode. OEM ID: DELL Product ID: PE 0106 APIC at: 0xFEE00000 I/O APIC #4 Version 17 at 0xFEC00000. I/O APIC #5 Version 17 at 0xFEC01000. I/O APIC #6 Version 17 at 0xFEC02000. Processors: 4 Kernel command line: ro root=/dev/sda6 Initializing CPU#0 Detected 2393.794 MHz processor. Console: colour VGA+ 80x25 Calibrating delay loop... 4771.02 BogoMIPS Memory: 3809560k/3866560k available (1236k kernel code, 56616k reserved, 867k data, 320k init, 2949056k highmem) Dentry cache hash table entries: 262144 (order: 9, 2097152 bytes) Inode cache hash table entries: 262144 (order: 9, 2097152 bytes) Mount cache hash table entries: 65536 (order: 7, 524288 bytes) Buffer cache hash table entries: 262144 (order: 8, 1048576 bytes) Page-cache hash table entries: 524288 (order: 9, 2097152 bytes) CPU: Before vendor init, caps: 3febfbff 00000000 00000000, vendor = 0 CPU: L1 I cache: 12K, L1 D cache: 8K CPU: L2 cache: 512K CPU: Physical Processor ID: 0 CPU: After vendor init, caps: 3febfbff 00000000 00000000 00000000 Intel machine check architecture supported. Intel machine check reporting enabled on CPU#0. CPU: After generic, caps: 3febfbff 00000000 00000000 00000000 CPU: Common caps: 3febfbff 00000000 00000000 00000000 Enabling fast FPU save and restore... done. Enabling unmasked SIMD FPU exception support... done. Checking 'hlt' instruction... OK. POSIX conformance testing by UNIFIX mtrr: v1.40 (20010327) Richard Gooch (rgooch.au) mtrr: detected mtrr type: Intel CPU: Before vendor init, caps: 3febfbff 00000000 00000000, vendor = 0 CPU: L1 I cache: 12K, L1 D cache: 8K CPU: L2 cache: 512K CPU: Physical Processor ID: 0 CPU: After vendor init, caps: 3febfbff 00000000 00000000 00000000 Intel machine check reporting enabled on CPU#0. CPU: After generic, caps: 3febfbff 00000000 00000000 00000000 CPU: Common caps: 3febfbff 00000000 00000000 00000000 CPU0: Intel(R) XEON(TM) CPU 2.40GHz stepping 04 per-CPU timeslice cutoff: 1462.91 usecs. task migration cache decay timeout: 10 msecs. enabled ExtINT on CPU#0 ESR value before enabling vector: 00000040 ESR value after enabling vector: 00000000 Booting processor 1/1 eip 2000 Initializing CPU#1 masked ExtINT on CPU#1 ESR value before enabling vector: 00000000 ESR value after enabling vector: 00000000 Calibrating delay loop... 4784.12 BogoMIPS CPU: Before vendor init, caps: 3febfbff 00000000 00000000, vendor = 0 CPU: L1 I cache: 12K, L1 D cache: 8K CPU: L2 cache: 512K CPU: Physical Processor ID: 0 CPU: After vendor init, caps: 3febfbff 00000000 00000000 00000000 Intel machine check reporting enabled on CPU#1. CPU: After generic, caps: 3febfbff 00000000 00000000 00000000 CPU: Common caps: 3febfbff 00000000 00000000 00000000 CPU1: Intel(R) XEON(TM) CPU 2.40GHz stepping 04 Booting processor 2/2 eip 2000 Initializing CPU#2 masked ExtINT on CPU#2 ESR value before enabling vector: 00000000 ESR value after enabling vector: 00000000 Calibrating delay loop... 4784.12 BogoMIPS CPU: Before vendor init, caps: 3febfbff 00000000 00000000, vendor = 0 CPU: L1 I cache: 12K, L1 D cache: 8K CPU: L2 cache: 512K CPU: Physical Processor ID: 3 CPU: After vendor init, caps: 3febfbff 00000000 00000000 00000000 Intel machine check reporting enabled on CPU#2. CPU: After generic, caps: 3febfbff 00000000 00000000 00000000 CPU: Common caps: 3febfbff 00000000 00000000 00000000 CPU2: Intel(R) XEON(TM) CPU 2.40GHz stepping 04 Booting processor 3/3 eip 2000 Initializing CPU#3 masked ExtINT on CPU#3 ESR value before enabling vector: 00000000 ESR value after enabling vector: 00000000 Calibrating delay loop... 4784.12 BogoMIPS CPU: Before vendor init, caps: 3febfbff 00000000 00000000, vendor = 0 CPU: L1 I cache: 12K, L1 D cache: 8K CPU: L2 cache: 512K CPU: Physical Processor ID: 3 CPU: After vendor init, caps: 3febfbff 00000000 00000000 00000000 Intel machine check reporting enabled on CPU#3. CPU: After generic, caps: 3febfbff 00000000 00000000 00000000 CPU: Common caps: 3febfbff 00000000 00000000 00000000 CPU3: Intel(R) XEON(TM) CPU 2.40GHz stepping 04 Total of 4 processors activated (19123.40 BogoMIPS). cpu_sibling_map[0] = 1 cpu_sibling_map[1] = 0 cpu_sibling_map[2] = 3 cpu_sibling_map[3] = 2 ENABLING IO-APIC IRQs Setting 4 in the phys_id_present_map ...changing IO-APIC physical APIC ID to 4 ... ok. Setting 5 in the phys_id_present_map ...changing IO-APIC physical APIC ID to 5 ... ok. Setting 6 in the phys_id_present_map ...changing IO-APIC physical APIC ID to 6 ... ok. init IO_APIC IRQs IO-APIC (apicid-pin) 4-0, 4-5, 4-7, 4-10, 4-11, 4-13, 6-15 not connected. ..TIMER: vector=0x31 pin1=2 pin2=0 ..MP-BIOS bug: 8254 timer not connected to IO-APIC ...trying to set up timer (IRQ0) through the 8259A ... ..... (found pin 0) ...works. number of MP IRQ sources: 46. number of IO-APIC #4 registers: 16. number of IO-APIC #5 registers: 16. number of IO-APIC #6 registers: 16. testing the IO APIC....................... IO APIC #4...... .... register #00: 04000000 ....... : physical APIC id: 04 .... register #01: 000F0011 ....... : max redirection entries: 000F ....... : PRQ implemented: 0 ....... : IO APIC version: 0011 .... register #02: 04000000 ....... : arbitration: 04 .... IRQ redirection table: NR Log Phy Mask Trig IRR Pol Stat Dest Deli Vect: 00 00F 0F 0 0 0 0 0 1 1 31 01 00F 0F 0 0 0 0 0 1 1 39 02 000 00 1 0 0 0 0 0 0 00 03 00F 0F 0 0 0 0 0 1 1 41 04 00F 0F 0 0 0 0 0 1 1 49 05 000 00 1 0 0 0 0 0 0 00 06 00F 0F 0 0 0 0 0 1 1 51 07 000 00 1 0 0 0 0 0 0 00 08 00F 0F 0 0 0 0 0 1 1 59 09 00F 0F 0 0 0 0 0 1 1 61 0a 000 00 1 0 0 0 0 0 0 00 0b 000 00 1 0 0 0 0 0 0 00 0c 00F 0F 0 0 0 0 0 1 1 69 0d 000 00 1 0 0 0 0 0 0 00 0e 00F 0F 0 0 0 0 0 1 1 71 0f 00F 0F 0 0 0 0 0 1 1 79 IO APIC #5...... .... register #00: 05000000 ....... : physical APIC id: 05 .... register #01: 000F0011 ....... : max redirection entries: 000F ....... : PRQ implemented: 0 ....... : IO APIC version: 0011 .... register #02: 05000000 ....... : arbitration: 05 .... IRQ redirection table: NR Log Phy Mask Trig IRR Pol Stat Dest Deli Vect: 00 00F 0F 1 1 0 1 0 1 1 81 01 00F 0F 1 1 0 1 0 1 1 89 02 00F 0F 1 1 0 1 0 1 1 91 03 00F 0F 1 1 0 1 0 1 1 99 04 00F 0F 1 1 0 1 0 1 1 A1 05 00F 0F 1 1 0 1 0 1 1 A9 06 00F 0F 1 1 0 1 0 1 1 B1 07 00F 0F 1 1 0 1 0 1 1 B9 08 00F 0F 1 1 0 1 0 1 1 C1 09 00F 0F 1 1 0 1 0 1 1 C9 0a 00F 0F 1 1 0 1 0 1 1 D1 0b 00F 0F 1 1 0 1 0 1 1 D9 0c 00F 0F 1 1 0 1 0 1 1 E1 0d 00F 0F 1 1 0 1 0 1 1 E9 0e 00F 0F 1 1 0 1 0 1 1 32 0f 00F 0F 1 1 0 1 0 1 1 3A IO APIC #6...... .... register #00: 06000000 ....... : physical APIC id: 06 .... register #01: 000F0011 ....... : max redirection entries: 000F ....... : PRQ implemented: 0 ....... : IO APIC version: 0011 .... register #02: 06000000 ....... : arbitration: 06 .... IRQ redirection table: NR Log Phy Mask Trig IRR Pol Stat Dest Deli Vect: 00 00F 0F 1 1 0 1 0 1 1 42 01 00F 0F 1 1 0 1 0 1 1 4A 02 00F 0F 1 1 0 1 0 1 1 52 03 00F 0F 1 1 0 1 0 1 1 5A 04 00F 0F 1 1 0 1 0 1 1 62 05 00F 0F 1 1 0 1 0 1 1 6A 06 00F 0F 1 1 0 1 0 1 1 72 07 00F 0F 1 1 0 1 0 1 1 7A 08 00F 0F 1 1 0 1 0 1 1 82 09 00F 0F 1 1 0 1 0 1 1 8A 0a 00F 0F 1 1 0 1 0 1 1 92 0b 00F 0F 1 1 0 1 0 1 1 9A 0c 00F 0F 1 1 0 1 0 1 1 A2 0d 00F 0F 1 1 0 1 0 1 1 AA 0e 00F 0F 1 1 0 1 0 1 1 B2 0f 000 00 1 0 0 0 0 0 0 00 IRQ to pin mappings: IRQ0 -> 0:0 IRQ1 -> 0:1 IRQ3 -> 0:3 IRQ4 -> 0:4 IRQ6 -> 0:6 IRQ8 -> 0:8 IRQ9 -> 0:9 IRQ12 -> 0:12 IRQ14 -> 0:14 IRQ15 -> 0:15 IRQ16 -> 1:0 IRQ17 -> 1:1 IRQ18 -> 1:2 IRQ19 -> 1:3 IRQ20 -> 1:4 IRQ21 -> 1:5 IRQ22 -> 1:6 IRQ23 -> 1:7 IRQ24 -> 1:8 IRQ25 -> 1:9 IRQ26 -> 1:10 IRQ27 -> 1:11 IRQ28 -> 1:12 IRQ29 -> 1:13 IRQ30 -> 1:14 IRQ31 -> 1:15 IRQ32 -> 2:0 IRQ33 -> 2:1 IRQ34 -> 2:2 IRQ35 -> 2:3 IRQ36 -> 2:4 IRQ37 -> 2:5 IRQ38 -> 2:6 IRQ39 -> 2:7 IRQ40 -> 2:8 IRQ41 -> 2:9 IRQ42 -> 2:10 IRQ43 -> 2:11 IRQ44 -> 2:12 IRQ45 -> 2:13 IRQ46 -> 2:14 .................................... done. Using local APIC timer interrupts. calibrating APIC timer ... ..... CPU clock speed is 2393.6957 MHz. ..... host bus clock speed is 99.7371 MHz. cpu: 0, clocks: 997371, slice: 199474 CPU0<T0:997360,T1:797872,D:14,S:199474,C:997371> cpu: 1, clocks: 997371, slice: 199474 cpu: 2, clocks: 997371, slice: 199474 cpu: 3, clocks: 997371, slice: 199474 CPU2<T0:997360,T1:398928,D:10,S:199474,C:997371> CPU3<T0:997360,T1:199456,D:8,S:199474,C:997371> CPU1<T0:997360,T1:598400,D:12,S:199474,C:997371> checking TSC synchronization across CPUs: passed. migration_task 0 on cpu=0 migration_task 1 on cpu=1 migration_task 2 on cpu=2 migration_task 3 on cpu=3 PCI: PCI BIOS revision 2.10 entry at 0xfc66e, last bus=13 PCI: Using configuration type 1 PCI: Probing PCI hardware Unknown bridge resource 2: assuming transparent PCI: Discovered primary peer bus 01 [IRQ] PCI: Discovered primary peer bus 03 [IRQ] PCI: Discovered primary peer bus 08 [IRQ] PCI: Discovered primary peer bus 0d [IRQ] PCI: Using IRQ router ServerWorks [1166/0201] at 00:0f.0 PCI->APIC IRQ transform: (B0,I6,P0) -> 18 PCI->APIC IRQ transform: (B1,I8,P0) -> 20 PCI->APIC IRQ transform: (B2,I6,P0) -> 20 PCI->APIC IRQ transform: (B2,I6,P1) -> 21 PCI->APIC IRQ transform: (B3,I6,P0) -> 27 isapnp: Scanning for PnP cards... isapnp: No Plug & Play device found Linux NET4.0 for Linux 2.4 Based upon Swansea University Computer Society NET3.039 Initializing RT netlink socket apm: BIOS not found. Starting kswapd allocated 256 pages and 256 bhs reserved for the highmem bounces VFS: Diskquotas version dquot_6.5.0 initialized pty: 2048 Unix98 ptys configured Serial driver version 5.05c (2001-07-08) with MANY_PORTS MULTIPORT SHARE_IRQ SERIAL_PCI ISAPNP enabled ttyS00 at 0x03f8 (irq = 4) is a 16550A ttyS01 at 0x02f8 (irq = 3) is a 16550A Real Time Clock Driver v1.10e block: 1024 slots per queue, batch=256 Uniform Multi-Platform E-IDE driver Revision: 6.31 ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx SvrWks CSB5: IDE controller on PCI bus 00 dev 79 SvrWks CSB5: chipset revision 147 SvrWks CSB5: not 100% native mode: will probe irqs later SvrWks CSB5: simplex device: DMA forced ide0: BM-DMA at 0x08b0-0x08b7, BIOS settings: hda:DMA, hdb:pio SvrWks CSB5: simplex device: DMA forced ide1: BM-DMA at 0x08b8-0x08bf, BIOS settings: hdc:DMA, hdd:DMA hda: SAMSUNG CD-ROM SN-124, ATAPI CD/DVD-ROM drive ide0 at 0x1f0-0x1f7,0x3f6 on irq 14 ide-floppy driver 0.99.newide Floppy drive(s): fd0 is 1.44M FDC 0 is a National Semiconductor PC87306 RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize ide-floppy driver 0.99.newide md: md driver 0.90.0 MAX_MD_DEVS=256, MD_SB_DISKS=27 md: Autodetecting RAID arrays. md: autorun ... md: ... autorun DONE. pci_hotplug: PCI Hot Plug PCI Core version: 0.4 NET4: Linux TCP/IP 1.0 for NET4.0 IP Protocols: ICMP, UDP, TCP, IGMP IP: routing cache hash table of 32768 buckets, 256Kbytes TCP: Hash tables configured (established 262144 bind 65536) Linux IP multicast router 0.06 plus PIM-SM NET4: Unix domain sockets 1.0/SMP for Linux NET4.0. RAMDISK: Compressed image found at block 0 Freeing initrd memory: 254k freed VFS: Mounted root (ext2 filesystem). SCSI subsystem driver Revision: 1.00 kmod: failed to exec /sbin/modprobe -s -k scsi_hostadapter, errno = 2 (scsi0) <Adaptec AIC-7890/1 Ultra2 SCSI host adapter> found at PCI 0/6/0 (scsi0) Wide Channel, SCSI ID=7, 32/255 SCBs (scsi0) Downloading sequencer code... 398 instructions downloaded scsi0 : Adaptec AHA274x/284x/294x (EISA/VLB/PCI-Fast SCSI) 5.2.4/5.2.0 <Adaptec AIC-7890/1 Ultra2 SCSI host adapter> blk: queue f768d818, I/O limit 4095Mb (mask 0xffffffff) Vendor: HP Model: Ultrium 1-SCSI Rev: E21V Type: Sequential-Access ANSI SCSI revision: 03 blk: queue f7fc3a18, I/O limit 4095Mb (mask 0xffffffff) Red Hat/Adaptec aacraid driver, Aug 7 2002 scsi1 : percraid Vendor: DELL Model: PERCRAID RAID5 Rev: 0001 Type: Direct-Access ANSI SCSI revision: 02 Attached scsi removable disk sda at scsi1, channel 0, id 0, lun 0 SCSI device sda: 1003500288 512-byte hdwr sectors (513792 MB) sda: Write Protect is off Partition check: sda: sda1 sda2 sda3 sda4 < sda5 sda6 sda7 sda8 sda9 sda10 > Journalled Block Device driver loaded kjournald starting. Commit interval 5 seconds EXT3-fs: mounted filesystem with ordered data mode. Freeing unused kernel memory: 320k freed Adding Swap: 2096440k swap-space (priority -1) EXT3 FS 2.4-0.9.18, 14 May 2002 on sd(8,6), internal journal kjournald starting. Commit interval 5 seconds EXT3 FS 2.4-0.9.18, 14 May 2002 on sd(8,1), internal journal EXT3-fs: mounted filesystem with ordered data mode.
the e820 table (this is the table the bios gives to linux to say how much memory is where) only shows 4 Gbyte minus 320Mb = 3776 of memory..... I recommend contacting Dell, for example via their excellent mailinglist linux-poweredge