Messages in this thread | | | Date | Mon, 6 Oct 2008 02:39:52 +0200 | From | "J.A. Magallón" <> | Subject | Re: Strange mtrrs in Aspire One |
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On Sat, 4 Oct 2008 16:10:57 -0700, "Yinghai Lu" <yinghai@kernel.org> wrote:
> On Sat, Oct 4, 2008 at 4:02 PM, J.A. Magallón <jamagallon@ono.com> wrote: > > On Sat, 4 Oct 2008 14:54:24 -0700, "Yinghai Lu" <yinghai@kernel.org> wrote: > > > >> 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 > >> > > > > Thanks, will try. > > > >> you may need to boot with "mtrr_gran_size=64k mtrr_chunk_size=64k" > >> > > > > This makes me think about a question. > > In the dual xeon box, the 'cleanup' ends with this setup: > > > > werewolf:~> cat /proc/mtrr > > reg00: base=0x00000000 ( 0MB), size=1024MB: write-back, count=1 > > reg01: base=0x40000000 (1024MB), size= 512MB: write-back, count=1 > > reg02: base=0x60000000 (1536MB), size= 256MB: write-back, count=1 > > reg03: base=0x70000000 (1792MB), size= 128MB: write-back, count=1 > > reg04: base=0x78000000 (1920MB), size= 64MB: write-back, count=1 > > reg05: base=0x7c000000 (1984MB), size= 64MB: write-back, count=1 > > reg06: base=0x7ff00000 (2047MB), size= 1MB: uncachable, count=1 > > > > Ths options with 0 me loose were: > > > > gran_size: 64K chunk_size: 32M num_reg: 8 lose cover RAM: 0G > > gran_size: 64K chunk_size: 64M num_reg: 7 lose cover RAM: 0G > > gran_size: 64K chunk_size: 128M num_reg: 6 lose cover RAM: 0G > > gran_size: 64K chunk_size: 256M num_reg: 5 lose cover RAM: 0G > > gran_size: 64K chunk_size: 512M num_reg: 4 lose cover RAM: 0G > > gran_size: 64K chunk_size: 1G num_reg: 3 lose cover RAM: 0G > > gran_size: 64K chunk_size: 2G num_reg: 2 lose cover RAM: 0G > > ... > > gran_size: 128K chunk_size: 32M num_reg: 8 lose cover RAM: 0G > > gran_size: 128K chunk_size: 64M num_reg: 7 lose cover RAM: 0G > > gran_size: 128K chunk_size: 128M num_reg: 6 lose cover RAM: 0G > > gran_size: 128K chunk_size: 256M num_reg: 5 lose cover RAM: 0G > > gran_size: 128K chunk_size: 512M num_reg: 4 lose cover RAM: 0G > > gran_size: 128K chunk_size: 1G num_reg: 3 lose cover RAM: 0G > > gran_size: 128K chunk_size: 2G num_reg: 2 lose cover RAM: 0G > > ... > > gran_size: 256K chunk_size: 32M num_reg: 8 lose cover RAM: 0G > > gran_size: 256K chunk_size: 64M num_reg: 7 lose cover RAM: 0G > > gran_size: 256K chunk_size: 128M num_reg: 6 lose cover RAM: 0G > > gran_size: 256K chunk_size: 256M num_reg: 5 lose cover RAM: 0G > > gran_size: 256K chunk_size: 512M num_reg: 4 lose cover RAM: 0G > > gran_size: 256K chunk_size: 1G num_reg: 3 lose cover RAM: 0G > > gran_size: 256K chunk_size: 2G num_reg: 2 lose cover RAM: 0G > > ... > > gran_size: 512K chunk_size: 32M num_reg: 8 lose cover RAM: 0G > > gran_size: 512K chunk_size: 64M num_reg: 7 lose cover RAM: 0G > > gran_size: 512K chunk_size: 128M num_reg: 6 lose cover RAM: 0G > > gran_size: 512K chunk_size: 256M num_reg: 5 lose cover RAM: 0G > > gran_size: 512K chunk_size: 512M num_reg: 4 lose cover RAM: 0G > > gran_size: 512K chunk_size: 1G num_reg: 3 lose cover RAM: 0G > > gran_size: 512K chunk_size: 2G num_reg: 2 lose cover RAM: 0G > > ... > > gran_size: 1M chunk_size: 32M num_reg: 8 lose cover RAM: 0G > > gran_size: 1M chunk_size: 64M num_reg: 7 lose cover RAM: 0G > > gran_size: 1M chunk_size: 128M num_reg: 6 lose cover RAM: 0G > > gran_size: 1M chunk_size: 256M num_reg: 5 lose cover RAM: 0G > > gran_size: 1M chunk_size: 512M num_reg: 4 lose cover RAM: 0G > > gran_size: 1M chunk_size: 1G num_reg: 3 lose cover RAM: 0G > > gran_size: 1M chunk_size: 2G num_reg: 2 lose cover RAM: 0G > > ... > > Found optimal setting for mtrr clean up > > gran_size: 64K chunk_size: 64M num_reg: 7 lose RAM: 0G > > > > Why did it choose that using 7 registers ? Should'n it get that with the > > smallest number of used registers, and from those the bigger gran_size ? > > If the purpose is to leave space for more mtrrs (from X or other...). > > In short, what is the purpose of having this: > > > > reg00: base=0x00000000 ( 0MB), size=1024MB: write-back, count=1 > > reg01: base=0x40000000 (1024MB), size= 512MB: write-back, count=1 > > reg02: base=0x60000000 (1536MB), size= 256MB: write-back, count=1 > > reg03: base=0x70000000 (1792MB), size= 128MB: write-back, count=1 > > reg04: base=0x78000000 (1920MB), size= 64MB: write-back, count=1 > > reg05: base=0x7c000000 (1984MB), size= 64MB: write-back, count=1 > > reg06: base=0x7ff00000 (2047MB), size= 1MB: uncachable, count=1 > > > > instead of this: > > > > reg00: base=0x00000000 ( 0MB), size=2048MB: write-back, count=1 > > reg01: base=0x7ff00000 (2047MB), size= 1MB: uncachable, count=1 > > > > If both set a hole, not a set of valid zones without holes ? > > > > ?? > > please do check with tip/master. > http://people.redhat.com/mingo/tip.git/readme.txt > > please boot with mtrr_cleanup_debug to find out right mtrr_gran_size > and mtrr_chunk_size... >
Kudos!!!
Finally I got messed with tip, and it all works.
For the Aspire One:
one:/proc> cat mtrr reg00: base=0x000000000 ( 0MB), size= 512MB, count=1: write-back reg01: base=0x01f500000 ( 501MB), size= 1MB, count=1: uncachable reg02: base=0x01f600000 ( 502MB), size= 2MB, count=1: uncachable reg03: base=0x01f800000 ( 504MB), size= 8MB, count=1: uncachable reg04: base=0x020000000 ( 512MB), size= 256MB, count=1: write-combining
(last one is set by x11 intel driver).
And for the dual Xeon:
werewolf:~> cat /proc/mtrr reg00: base=0x000000000 ( 0MB), size= 2048MB, count=1: write-back reg01: base=0x07ff00000 ( 2047MB), size= 1MB, count=1: uncachable
So everything is fine.
Thanks !!
-- J.A. Magallon <jamagallon()ono!com> \ Software is like sex: \ It's better when it's free Mandriva Linux release 2009.0 (Cooker) for i586 Linux 2.6.25-jam18 (gcc 4.3.1 20080626 (GCC) #1 SMP -- 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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