only 3 of 4GB memory available on amd64 8.1-RC1

Andrey Fesenko f0andrey at
Mon Jun 21 08:41:34 UTC 2010

On Sun, Jun 20, 2010 at 12:26 AM, Andriy Gapon <avg at> wrote:
> on 19/06/2010 20:16 Andreas Tobler said the following:
>> Hi all,
>> I got my hands on a t60 with 4GB of RAM (BIOS displays it)
> Yes, PAE is for what we call in FreeBSD land "i386".
> "x86" we use for both i386 and amd64.
> Now, to the rest.
> I recently investigated this topic myself, so I can share what I learned.
> The first thing you'd want to have is SMAP information.
> You can get it at the loader prompt with 'smap' command.
> It is also reported by kernel during a verbose boot, but it is only printed to
> console; it is not saved to dmesg, because it is printed before msgbuf is created.
> That's about all.
> I am curious as to what you would discover about your system - please share with us.
> --
> Andriy Gapon


My notebook Toshiba U200-10H
Install 4Gb(2+2) bios detect 3,... not all

tipe=01 base=0000000000000000 len=000000000009fc00
tipe=02 base=000000000009fc00 len=0000000000000400
tipe=02 base=00000000000e0000 len=000000000000ee00
tipe=04 base=00000000000eee00 len=0000000000000200
tipe=02 base=00000000000ef000 len=0000000000011000
tipe=01 base=0000000000100000 len=00000000cf690000
tipe=02 base=00000000cf790000 len=0000000000010000
tipe=02 base=00000000cf7a0000 len=0000000000060000
tipe=02 base=00000000cf800000 len=0000000000800000
tipe=02 base=00000000fec00000 len=0000000000018000
tipe=02 base=00000000fec20000 len=0000000000008000
tipe=02 base=00000000fed00000 len=0000000000000400
tipe=02 base=00000000fed14000 len=0000000000006000
tipe=02 base=00000000fed1c000 len=0000000000074000
tipe=02 base=00000000feda0000 len=0000000000020000
tipe=02 base=00000000fee00000 len=0000000000001000
tipe=02 base=00000000ffb00000 len=0000000000100000
tipe=02 base=00000000ffe00000 len=0000000000200000

FreeBSD 9.0-CURRENT #1 r209362: Sun Jun 20 21:44:27 MSD 2010
    andrey at my_book:/usr/obj/home/andrey/src_head/sys/MY_BOOK amd64
CPU: Intel(R) Core(TM)2 CPU         T5600  @ 1.83GHz (1828.76-MHz K8-class CPU)
  Origin = "GenuineIntel"  Id = 0x6f2  Family = 6  Model = f  Stepping = 2
  AMD Features=0x20100800<SYSCALL,NX,LM>
  AMD Features2=0x1<LAHF>
  TSC: P-state invariant
real memory  = 4294967296 (4096 MB)
Physical memory chunk(s):
0x0000000000001000 - 0x000000000009bfff, 634880 bytes (155 pages)
0x000000000126a000 - 0x00000000c95dafff, 3359051776 bytes (820081 pages)
avail memory = 3339898880 (3185 MB)

full dmesg+debug

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