https://bugzilla.kernel.org/show_bug.cgi?id=15469
--- Comment #14 from Artem S. Tashkinov <t.ar...@mailcity.com> 2010-05-10
10:06:22 ---
Funnily 64 bit kernel sees even less RAM:
$ free
total used free shared buffers cached
Mem: 3724300 401916 3322384 0 30668 189920
-/+ buffers/cache: 181328 3542972
Swap: 0 0 0
$ cat /proc/iomem
00000000-0000ffff : reserved
00010000-0009f7ff : System RAM
0009f800-0009ffff : reserved
000c0000-000cffff : pnp 00:0e
000e4000-000fffff : reserved
00100000-ab76ffff : System RAM
01000000-012d98bd : Kernel code
012d98be-014147ff : Kernel data
0147d000-014e9c77 : Kernel bss
ab770000-ab77ffff : ACPI Tables
ab780000-ab7cffff : ACPI Non-volatile Storage
ab7d0000-ab7dffff : reserved
ab7e0000-ab7eb3ff : RAM buffer
ab7eb400-bfffffff : reserved
c0000000-c03fffff : PCI Bus 0000:03
c0400000-c07fffff : PCI Bus 0000:02
c0800000-c0800fff : Intel Flush Page
d0000000-dfffffff : 0000:00:02.0
e0000000-efffffff : PCI MMCONFIG 0000 [bus 00-ff]
e0000000-efffffff : pnp 00:0d
fad00000-fadfffff : PCI Bus 0000:01
fadf8000-fadfbfff : 0000:01:00.0
fadf8000-fadfbfff : r8169
fadff000-fadfffff : 0000:01:00.0
fadff000-fadfffff : r8169
fae00000-faefffff : PCI Bus 0000:02
faf00000-faffffff : PCI Bus 0000:03
fb800000-fbbfffff : 0000:00:02.0
fbdf6000-fbdf63ff : 0000:00:1a.0
fbdf6000-fbdf63ff : ehci_hcd
fbdf8000-fbdfbfff : 0000:00:1b.0
fbdf8000-fbdfbfff : ICH HD audio
fbdfc000-fbdfc3ff : 0000:00:1d.0
fbdfc000-fbdfc3ff : ehci_hcd
fbdffc00-fbdffcff : 0000:00:1f.3
fbe00000-fbefffff : PCI Bus 0000:01
fbee0000-fbefffff : 0000:01:00.0
fbf00000-fbffffff : PCI Bus 0000:04
fbfc0000-fbfdffff : 0000:04:01.0
fbfc0000-fbfdffff : e100
fbfe0000-fbfeffff : 0000:04:01.0
fbffe000-fbffefff : 0000:04:01.0
fbffe000-fbffefff : e100
fc000000-fcffffff : pnp 00:01
fd000000-fdffffff : pnp 00:01
fe000000-febfffff : pnp 00:01
fec00000-fec003ff : IOAPIC 0
fed00000-fed003ff : HPET 0
fed14000-fed19fff : pnp 00:01
fed1c000-fed1ffff : pnp 00:07
fed20000-fed3ffff : pnp 00:07
fed40000-fed8ffff : pnp 00:07
fee00000-fee00fff : Local APIC
fee00000-fee00fff : reserved
fee00000-fee00fff : pnp 00:09
ffa00000-ffffffff : reserved
100000000-13fffffff : System RAM
$ cat /proc/mtrr
reg00: base=0x000000000 ( 0MB), size= 2048MB, count=1: write-back
reg01: base=0x080000000 ( 2048MB), size= 512MB, count=1: write-back
reg02: base=0x0a0000000 ( 2560MB), size= 128MB, count=1: write-back
reg03: base=0x0a8000000 ( 2688MB), size= 64MB, count=1: write-back
reg04: base=0x100000000 ( 4096MB), size= 1024MB, count=1: write-back
reg05: base=0x0d0000000 ( 3328MB), size= 256MB, count=1: write-combining
$ uname -a
Linux localhost.localdomain 2.6.33.3-ic64 #2 SMP PREEMPT Mon May 10 09:06:02
UTC 2010 x86_64 x86_64 x86_64 GNU/Linux
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