Messages in this thread | | | Date | Wed, 16 Jan 2013 16:31:36 -0800 | Subject | Re: Use of memmap= to forcibly recover memory in 3GB-4GB range - is this safe? | From | Yinghai Lu <> |
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On Wed, Jan 16, 2013 at 4:24 PM, Alex Villacís Lasso <a_villacis@palosanto.com> wrote: > El 16/01/13 02:11, Yinghai Lu escribió: > >> On Tue, Jan 15, 2013 at 5:47 PM, Alex Villacís Lasso >> <a_villacis@palosanto.com> wrote: >>> >>> [ 0.000000] e820: BIOS-provided physical RAM map: >>> [ 0.000000] BIOS-e820: [mem 0x0000000000000000-0x000000000009f3ff] >>> usable >>> [ 0.000000] BIOS-e820: [mem 0x000000000009f400-0x000000000009ffff] >>> reserved >>> [ 0.000000] BIOS-e820: [mem 0x00000000000f0000-0x00000000000fffff] >>> reserved >>> [ 0.000000] BIOS-e820: [mem 0x0000000000100000-0x00000000cf58ffff] >>> usable >>> [ 0.000000] BIOS-e820: [mem 0x00000000cf590000-0x00000000cf5e2fff] >>> ACPI >>> NVS >>> [ 0.000000] BIOS-e820: [mem 0x00000000cf5e3000-0x00000000cf5effff] >>> ACPI >>> data >>> [ 0.000000] BIOS-e820: [mem 0x00000000cf5f0000-0x00000000cf5fffff] >>> reserved >>> [ 0.000000] BIOS-e820: [mem 0x00000000e0000000-0x00000000efffffff] >>> reserved >>> [ 0.000000] BIOS-e820: [mem 0x00000000fec00000-0x00000000ffffffff] >>> reserved >>> [ 0.000000] NX (Execute Disable) protection: active >> >> .. >>> >>> [ 0.000000] original variable MTRRs >>> [ 0.000000] reg 0, base: 4GB, range: 512MB, type WB >>> [ 0.000000] reg 1, base: 4608MB, range: 256MB, type WB >>> [ 0.000000] reg 2, base: 0GB, range: 2GB, type WB >>> [ 0.000000] reg 3, base: 2GB, range: 1GB, type WB >>> [ 0.000000] reg 4, base: 3GB, range: 256MB, type WB >>> [ 0.000000] reg 5, base: 3319MB, range: 1MB, type UC >>> [ 0.000000] reg 6, base: 3320MB, range: 8MB, type UC >>> [ 0.000000] reg 7, base: 3318MB, range: 1MB, type UC >>> [ 0.000000] total RAM covered: 4086M >> >> Can you apply attached debug patch to see if the raw e820 is right from >> BIOS ?
> Done. The output is attached. I see no difference between raw and sanitized > maps.
yeah, it is BIOS problem.
you may either live with memmap= or try to get one BIOS update.
Yinghai -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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