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 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
