Messages in this thread | | | Date | Sat, 4 Oct 2008 14:54:24 -0700 | From | "Yinghai Lu" <> | Subject | Re: Strange mtrrs in Aspire One |
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On Sat, Oct 4, 2008 at 10:55 AM, Yinghai Lu <yinghai@kernel.org> wrote: > On Sat, Oct 4, 2008 at 6:22 AM, J.A. Magallón <jamagallon@ono.com> wrote: >> On Mon, 29 Sep 2008 18:05:51 -0700, "Yinghai Lu" <yinghai@kernel.org> wrote: >> >>> On Mon, Sep 29, 2008 at 4:57 PM, J.A. Magallón <jamagallon@ono.com> wrote: >>> > Hi all... >>> > >>> > My aspire one is giving some strange MTRR settings with rc7-git5 (and >>> > prevous kernels, but that is what I run now...): >>> > >>> > one:~> cat /proc/mtrr >>> > reg00: base=0xfffe0000 (4095MB), size= 128KB: write-protect, count=1 >>> > reg01: base=0xfffc0000 (4095MB), size= 128KB: uncachable, count=1 >>> >>> could make mtrr_cleanup to support 128K gran_size >>> >>> > reg02: base=0x00000000 ( 0MB), size= 256MB: write-back, count=1 >>> > reg03: base=0x10000000 ( 256MB), size= 256MB: write-back, count=1 >>> > reg04: base=0x1f800000 ( 504MB), size= 8MB: uncachable, count=1 >>> > reg05: base=0x1f600000 ( 502MB), size= 2MB: uncachable, count=1 >>> > reg06: base=0x1f500000 ( 501MB), size= 1MB: uncachable, count=1 >>> >>> > reg07: base=0x00000000 ( 0MB), size= 128KB: uncachable, count=1 >>> .. >>> > BIOS-e820: 0000000000000000 - 000000000009fc00 (usable) >>> >>> last entry is really sick... >>> >> >> I have applied the patches you have posted in other threads, and this >> give a very strange result. The mtrr cleanup did nothing, and I had to put >> some printk's all around. > > will have one patch to assume the [0, 1M) to be coverred by var mtrrs. >
please check other three patches.
[PATCH 1/3] x86: mtrr_cleanup: print out correct type [PATCH 2/3] x86: mtrr_cleanup: first 1M should be coverred in var mtrrs [PATCH 3/3] x86: mtrr_cleanup: treat WRPROT as UNCACHEABLE
you may need to boot with "mtrr_gran_size=64k mtrr_chunk_size=64k"
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