Re: Only 3.2G ram out of 4G seen in an i386 box

[Thomas Stewart <thomas@stewarts.org.uk>]

On Tue, Aug 08, 2006 at 11:13:00AM +0200, Mikael Pettersson wrote:
> Most likely the BIOS is reserving large parts of the [0,4GB[ range for
> PCI devices and some for itself. Please post the E820 memory map the
> kernel prints near the start of the boot sequence on your machine.

Linux version 2.6.16-2-686 (Debian 2.6.16-17) (waldi@debian.org) (gcc version 4.6BIOS-provided physical RAM map:
 BIOS-e820: 0000000000000000 - 00000000000a0000 (usable)
 BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved)
 BIOS-e820: 0000000000100000 - 00000000cfe86c00 (usable)
 BIOS-e820: 00000000cfe86c00 - 00000000cfe88c00 (ACPI NVS)
 BIOS-e820: 00000000cfe88c00 - 00000000cfe8ac00 (ACPI data)
 BIOS-e820: 00000000cfe8ac00 - 00000000d0000000 (reserved)
 BIOS-e820: 00000000e0000000 - 00000000f0000000 (reserved)
 BIOS-e820: 00000000fec00000 - 00000000fed00400 (reserved)
 BIOS-e820: 00000000fed20000 - 00000000feda0000 (reserved)
 BIOS-e820: 00000000fee00000 - 00000000fef00000 (reserved)
 BIOS-e820: 00000000ffb00000 - 0000000100000000 (reserved)
2174MB HIGHMEM available.
1152MB LOWMEM available.

Linux version 2.6.18-rc3-git3-ts1 (root@coke) (gcc version 4.0.4 20060507 (prer6BIOS-provided physical RAM map:
 BIOS-e820: 0000000000000000 - 00000000000a0000 (usable)
 BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved)
 BIOS-e820: 0000000000100000 - 00000000cfe86c00 (usable)
 BIOS-e820: 00000000cfe86c00 - 00000000cfe88c00 (ACPI NVS)
 BIOS-e820: 00000000cfe88c00 - 00000000cfe8ac00 (ACPI data)
 BIOS-e820: 00000000cfe8ac00 - 00000000d0000000 (reserved)
 BIOS-e820: 00000000e0000000 - 00000000f0000000 (reserved)
 BIOS-e820: 00000000fec00000 - 00000000fed00400 (reserved)
 BIOS-e820: 00000000fed20000 - 00000000feda0000 (reserved)
 BIOS-e820: 00000000fee00000 - 00000000fef00000 (reserved)
 BIOS-e820: 00000000ffb00000 - 0000000100000000 (reserved)
2430MB HIGHMEM available.
896MB LOWMEM available.

Linux version 2.6.18-rc2-mm1-ts1 (root@coke) (gcc version 4.0.4 20060507 (prere6BIOS-provided physical RAM map:
sanitize start
sanitize end
copy_e820_map() start: 0000000000000000 size: 00000000000a0000 end: 000000000001copy_e820_map() type is E820_RAM
copy_e820_map() start: 00000000000f0000 size: 0000000000010000 end: 000000000012copy_e820_map() start: 0000000000100000 size: 00000000cfd86c00 end: 00000000cfe1copy_e820_map() type is E820_RAM
copy_e820_map() start: 00000000cfe86c00 size: 0000000000002000 end: 00000000cfe4copy_e820_map() start: 00000000cfe88c00 size: 0000000000002000 end: 00000000cfe3copy_e820_map() start: 00000000cfe8ac00 size: 0000000000175400 end: 00000000d002copy_e820_map() start: 00000000e0000000 size: 0000000010000000 end: 00000000f002copy_e820_map() start: 00000000fec00000 size: 0000000000100400 end: 00000000fed2copy_e820_map() start: 00000000fed20000 size: 0000000000080000 end: 00000000fed2copy_e820_map() start: 00000000fee00000 size: 0000000000100000 end: 00000000fef2copy_e820_map() start: 00000000ffb00000 size: 0000000000500000 end: 000000010002 BIOS-e820: 0000000000000000 - 00000000000a0000 (usable)
 BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved)
 BIOS-e820: 0000000000100000 - 00000000cfe86c00 (usable)
 BIOS-e820: 00000000cfe86c00 - 00000000cfe88c00 (ACPI NVS)
 BIOS-e820: 00000000cfe88c00 - 00000000cfe8ac00 (ACPI data)
 BIOS-e820: 00000000cfe8ac00 - 00000000d0000000 (reserved)
 BIOS-e820: 00000000e0000000 - 00000000f0000000 (reserved)
 BIOS-e820: 00000000fec00000 - 00000000fed00400 (reserved)
 BIOS-e820: 00000000fed20000 - 00000000feda0000 (reserved)
 BIOS-e820: 00000000fee00000 - 00000000fef00000 (reserved)
 BIOS-e820: 00000000ffb00000 - 0000000100000000 (reserved)
2430MB HIGHMEM available.
896MB LOWMEM available.

Regards
--
Tom
-
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/