Re: Missing 1GB RAM, where is it?

[andrzej-kardas]

> OK, easiest things first, could you show us:
> 1. the output of  "grep -i highmem " toward your running kernel config file?

Highmem is on:

cat /boot/config-2.6.33.1  | grep -i highmem
# CONFIG_NOHIGHMEM is not set
# CONFIG_HIGHMEM4G is not set
CONFIG_HIGHMEM64G=y
CONFIG_HIGHMEM=y
# CONFIG_DEBUG_HIGHMEM is not set

> 
> 2. the complete entry grub/lilo stanza that is responsible to execute
> your current running kernel
> 

menuentry 'Linux 2.6.33.1' --class ubuntu --class gnu-linux --class gnu --class os {
       recordfail
       insmod ext2
       set root='(hd0,2)'
       search --no-floppy --fs-uuid --set 2875dab1-590c-4c56-a1a8-69ac3221e339
       linux   /boot/vmlinuz-2.6.33.1 root=UUID=2875dab1-590c-4c56-a1a8-69ac3221e339 ro   quiet splash
       initrd  /boot/initrd.img-2.6.33.1
}

I noticed that addresses in /proc/iomem are not contiguous as follow:


root at lpt:~# cat /proc/iomem
00000000-00001fff : System RAM
00002000-0000ffff : reserved
00010000-0009f7ff : System RAM
0009f800-0009ffff : reserved
000a0000-000bffff : Video RAM area
000c0000-000c7fff : Video ROM
000cf000-000d07ff : Adapter ROM        


hole - how about address range from 000d0800 to 000dffff ?? 

000e0000-000fffff : reserved
  000f0000-000fffff : System ROM
00100000-bf67ffff : System RAM
  00100000-005951c8 : Kernel code
  005951c9-007be6e7 : Kernel data
  00854000-008dfadb : Kernel bss
bf680000-bf6fffff : ACPI Non-volatile Storage
bf700000-bfffffff : reserved
c0000000-c3ffffff : PCI Bus 0000:06
  c0000000-c3ffffff : PCI CardBus 0000:07
c4000000-c41fffff : PCI Bus 0000:02
c4200000-c43fffff : PCI Bus 0000:02
c4400000-c45fffff : PCI Bus 0000:03
c4600000-c47fffff : PCI Bus 0000:03
c4800000-c49fffff : PCI Bus 0000:04
c4a00000-c4bfffff : PCI Bus 0000:04
c4c00000-c4dfffff : PCI Bus 0000:05
c4e00000-c4e00fff : Intel Flush Page

next hole, c4e01000 - c7ffffff ?

c8000000-cbffffff : PCI CardBus 0000:07
d0000000-dfffffff : 0000:00:02.0
e0000000-efffffff : PCI MMCONFIG 0000 [bus 00-ff]
  e0000000-efffffff : reserved
    e0000000-efffffff : pnp 00:01
f0000000-f007ffff : 0000:00:02.0
f0080000-f00fffff : 0000:00:02.1
f0100000-f01fffff : PCI Bus 0000:05
  f0100000-f0100fff : 0000:05:00.0
    f0100000-f0100fff : iwl3945
f0200000-f02fffff : PCI Bus 0000:06
  f0200000-f0201fff : 0000:06:01.0
    f0200000-f0201fff : 0000:06:01.0
  f0202000-f0202fff : 0000:06:04.0
    f0202000-f0202fff : yenta_socket
  f0203000-f020307f : 0000:06:04.1
  f0203100-f02031ff : 0000:06:04.4
    f0203100-f02031ff : mmc1
  f0203400-f02034ff : 0000:06:04.2
    f0203400-f02034ff : mmc0
  f0203800-f020387f : 0000:06:04.3
f0300000-f033ffff : 0000:00:02.0
f0340000-f0343fff : 0000:00:1b.0
  f0340000-f0343fff : ICH HD audio

hole - f0344000 - f0543fff

f0544000-f05443ff : 0000:00:1d.7
  f0544000-f05443ff : ehci_hcd

hole - f0544400 - febfffff

fec00000-fec0ffff : reserved
  fec00000-fec003ff : IOAPIC 0

hole - fec0ffff - fecfffff

fed00000-fed003ff : HPET 0
  fed00000-fed003ff : reserved
    fed00000-fed003ff : pnp 00:04

hole - fed00400 - fed13fff

fed14000-fed19fff : reserved
  fed14000-fed17fff : pnp 00:01
  fed18000-fed18fff : pnp 00:01
  fed19000-fed19fff : pnp 00:01

hole - fed1a000 - fed1bfff

fed1c000-fed8ffff : reserved
  fed1c000-fed1ffff : pnp 00:01
  fed20000-fed3ffff : pnp 00:01

hole - fed90000 -  fedfffff

fee00000-fee00fff : Local APIC
  fee00000-fee00fff : reserved

hole - fee00fff - feffffff

ff000000-ffffffff : reserved


Addreses marked by me as "hole",  I think, are reserved for usage for devices, but why aren't show in /proc/iomem  as region of "reserved" or something else (like BIOS region, or PCI bus?

--
regards
Andrzej Kardas
http://www.linux.mynotes.pl