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    SubjectRe: 2.4.24 HIGHMEM=300m: BUG: wrong zone alignment, it will crash
    Date
    On Friday 06 February 2004 05:21, Michael Frank wrote:
    > System has 500M RAM. When using highmem=300m dmesg as follows.

    500m total or 500m over 4g?

    > Linux version 2.4.24-mhf168 (root@mhfl4) (gcc version 2.95.3 20010315
    > (release)) #2 Fri Feb 6 11:08:28 HKT 2004 BIOS-provided physical RAM map:
    > BIOS-e820: 0000000000000000 - 000000000009fc00 (usable)

    low 640k

    > BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved)
    > BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved)
    > BIOS-e820: 0000000000100000 - 000000001eff0000 (usable)

    almost up to 512m mark only. So, you dont have any highmem.

    > BIOS-e820: 000000001eff0000 - 000000001eff3000 (ACPI NVS)
    > BIOS-e820: 000000001eff3000 - 000000001f000000 (ACPI data)
    > BIOS-e820: 00000000fec00000 - 0000000100000000 (reserved)
    > 300MB HIGHMEM available.

    you lied to kernel

    > 195MB LOWMEM available.
    > On node 0 totalpages: 126960
    > zone(0): 4096 pages.
    > zone(1): 46064 pages.
    > zone(2): 76800 pages.
    > BUG: wrong zone alignment, it will crash
    > Kernel command line: vga=0xf07 root=/dev/hda4 resume2=swap:/dev/hda1
    > console=tty0 console=ttyS0,115200n8r devfs=nomount nousb acpi=off
    > highmem=300m
    ^^^^^^^^^^^^ wrong
    >
    > What went wrong ?
    --
    vda
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