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    Subject[BUG 2.6.29_rc8] BIOS Bug: CPU MTRRs don't cover all of memory, losing 0MB of RAM.

    Just compiled and tried to boot it on an HP ProLiant DL580 G5. Here's the
    interesting part:

    -- last_pfn = 0x82ffff max_arch_pfn = 0x1000000
    x86 PAT enabled: cpu 0, old 0x7040600070406, new 0x7010600070106
    WARNING: BIOS bug: CPU MTRRs don't cover all of memory, losing 0MB of RAM.
    ------------[ cut here ]------------
    WARNING: at arch/x86/kernel/cpu/mtrr/main.c:1655 mtrr_trim_uncached_memory+0x2a9/0x2cd()
    Hardware name: ProLiant DL580 G5
    Modules linked in:
    Pid: 0, comm: swapper Not tainted 2.6.29_rc8-115 #1
    Call Trace:
    [<c013134d>] warn_slowpath+0x71/0xa8
    [<c039971c>] ? _spin_unlock_irqrestore+0x19/0x1f
    [<c039971c>] ? _spin_unlock_irqrestore+0x19/0x1f
    [<c01319c4>] ? release_console_sem+0x185/0x1b2
    [<c0131e49>] ? vprintk+0x280/0x2a5
    [<c03973da>] ? printk+0xf/0x15
    [<c053423f>] mtrr_trim_uncached_memory+0x2a9/0x2cd
    [<c052f4bd>] setup_arch+0x439/0x99e
    [<c01319c4>] ? release_console_sem+0x185/0x1b2
    [<c0131e49>] ? vprintk+0x280/0x2a5
    [<c0531b37>] ? __reserve_early+0xe4/0xf8
    [<c03973da>] ? printk+0xf/0x15
    [<c052b5b6>] start_kernel+0x7b/0x345
    [<c052b085>] __init_begin+0x85/0x8d
    ---[ end trace 4eaa2a86a8e2da22 ]---
    update e820 for mtrr

    This is a quite generic x86 desktop kernel with only the
    following differences for the server:

    # CONFIG_X86_GENERIC is not set

    I didn't want to add full dmesg and config for not flooding the e-mail but
    if you need them or other output/information, i can send them.


    Ozan Çağlayan

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      Last update: 2009-03-16 14:51    [W:0.021 / U:149.044 seconds]
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