Messages in this thread | | | Date | Mon, 16 Mar 2009 15:48:42 +0200 | From | Ozan Çağlayan <> | Subject | [BUG 2.6.29_rc8] BIOS Bug: CPU MTRRs don't cover all of memory, losing 0MB of RAM. |
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Hi,
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_GENERICARCH=y CONFIG_X86_BIGSMP=y CONFIG_MCORE2=y CONFIG_HIGHMEM64G=y # 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.
Thanks,
Ozan Çağlayan
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