On Wed, Sep 19, 2007 at 11:28:16AM +0200, Wojciech Kromer wrote:
> a)With mem=8GB parameter I had:
>
> #free -m
> total used free shared buffers cached
> Mem: 6473 474 5999 0 29 278
>
>
> b) Without mem=8GM system slows down while booting and sometimes restart...
>
>
> ==== So the story begins ===========================
>
> It's strange GIGABYTE missinformation, but:
> - my board came with F2 release
> - after detecting memory problem, I've upgraded it to F4 (latest at this
> moment)
> - next day came with F5 release ,
> there was only one info: "Fix PS2 keyboard compatibility issues",
> so I decided *not* to upgrade BIOS
>
> But yesterday I've finally upgraded to F5 release.
> ... and here is *surrprise*: MTRR changed to:
Never ever trust the "changelog" of the BIOS release to contain all the
changes. That would be admiting to having made mistakes after all. :)
> #cat /proc/mtrr
> reg00: base=0x00000000 ( 0MB), size=4096MB: write-back, count=1
> reg01: base=0xc0000000 (3072MB), size=1024MB: uncachable, count=1
> reg02: base=0xa0000000 (2560MB), size= 512MB: uncachable, count=1
> reg03: base=0x100000000 (4096MB), size=4096MB: write-back, count=1
> reg04: base=0x200000000 (8192MB), size=2048MB: write-back, count=1
> reg05: base=0x260000000 (9728MB), size= 512MB: uncachable, count=1
> reg06: base=0x9ff00000 (2559MB), size= 1MB: write-through, count=1
Well they are in sane order now (the previous order was weird) And they
don't do as much setting a range as one thing and then deleting small
pieces from it afterwards.
> Now there are no complains about MTRR in dmesg.
>
> E820 seems to be the same:
>
> BIOS-e820: 0000000000000000 - 000000000009f800 (usable)
> BIOS-e820: 000000000009f800 - 00000000000a0000 (reserved)
> BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved)
> BIOS-e820: 0000000000100000 - 000000009fee0000 (usable)
> BIOS-e820: 000000009fee0000 - 000000009fee3000 (ACPI NVS)
> BIOS-e820: 000000009fee3000 - 000000009fef0000 (ACPI data)
> BIOS-e820: 000000009fef0000 - 000000009ff00000 (reserved)
> BIOS-e820: 00000000c0000000 - 00000000c4000000 (reserved)
> BIOS-e820: 00000000fec00000 - 0000000100000000 (reserved)
> BIOS-e820: 0000000100000000 - 0000000260000000 (usable)
Well that part always did look sane.
> And finally I have my 8GB working without any kernel parameter,
>
> # free -m
> total used free shared buffers cached
> Mem: 7988 1120 6868 0 88 612
>
> Now i need to rerun memory tests.
> Thank you for helping me with this stuff.
Well now things look good. Nice to know BIOS updates occationally fix
things, even if they don't admit to it.
--
Len Sorensen
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