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From: "Yinghai Lu" <yhlu.kernel@gmail.com>
To: "Andrew Morton" <akpm@linux-foundation.org>
Cc: "Ingo Molnar" <mingo@elte.hu>, "Andi Kleen" <ak@suse.de>,
	"H. Peter Anvin" <hpa@zytor.com>,
	LKML <linux-kernel@vger.kernel.org>,
	"Jesse Barnes" <jesse.barnes@intel.com>,
	"Mika Fischer" <mika.fischer@zoopnet.de>,
	balajirrao@gmail.com
Subject: Re: [PATCH] x86_32: trim memory by updating e820 v3
Date: Sat, 26 Apr 2008 17:57:16 -0700	[thread overview]
Message-ID: <86802c440804261757h305e5abbs9d61f2fd4f40cc4f@mail.gmail.com> (raw)
In-Reply-To: <20080426035614.a30afb17.akpm@linux-foundation.org>

On Sat, Apr 26, 2008 at 3:56 AM, Andrew Morton
<akpm@linux-foundation.org> wrote:
> On Tue, 22 Jan 2008 16:23:20 -0800 Yinghai Lu <Yinghai.Lu@Sun.COM> wrote:
>
>  > [PATCH] x86_32: trim memory by updating e820 v3
>  >
>  > when mtrr is not covering all e820 table, need to trim the ram, need to update e820
>  >
>  > reuse some code for x86_64
>  >
>  > here need to add early_get_cap and use it in early_cpu_detect, and move mtrr_bp_init early
>  >
>  > need Justine to test with his special system with bug bios.
>  >
>  > Signed-off-by: Yinghai Lu <yinghai.lu@sun.com>
>
>  Speaking of mtrr and e820....
>
>  Could someone please take a peek at
>  http://bugzilla.kernel.org/show_bug.cgi?id=10508 ?
>
>  For some reason we seem to have turned this:
>
>  [    0.000000]  BIOS-e820: 0000000000000000 - 000000000009f800 (usable)
>  [    0.000000]  BIOS-e820: 000000000009f800 - 00000000000a0000 (reserved)
>  [    0.000000]  BIOS-e820: 00000000000dc000 - 0000000000100000 (reserved)
>  [    0.000000]  BIOS-e820: 0000000000100000 - 00000000bf6d0000 (usable)
>  [    0.000000]  BIOS-e820: 00000000bf6d0000 - 00000000bf6e3000 (ACPI NVS)
>  [    0.000000]  BIOS-e820: 00000000bf6e3000 - 00000000c0000000 (reserved)
>  [    0.000000]  BIOS-e820: 00000000e0000000 - 00000000f0000000 (reserved)
>  [    0.000000]  BIOS-e820: 00000000fec00000 - 00000000fec10000 (reserved)
>  [    0.000000]  BIOS-e820: 00000000fed00000 - 00000000fed00400 (reserved)
>  [    0.000000]  BIOS-e820: 00000000fed14000 - 00000000fed1a000 (reserved)
>  [    0.000000]  BIOS-e820: 00000000fed1c000 - 00000000fed90000 (reserved)
>  [    0.000000]  BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved)
>  [    0.000000]  BIOS-e820: 00000000ff000000 - 0000000100000000 (reserved)
>  [    0.000000]  BIOS-e820: 0000000100000000 - 0000000140000000 (usable)
>
>  into this:
>
>  reg00: base=0xc0000000 (3072MB), size=1024MB: uncachable, count=1
>  reg01: base=0x00000000 ( 0MB), size=4096MB: write-back, count=1
>  reg02: base=0x100000000 (4096MB), size=1024MB: write-back, count=1
>  reg03: base=0xbf700000 (3063MB), size= 1MB: uncachable, count=1
>  reg04: base=0xbf800000 (3064MB), size= 8MB: uncachable, count=1
>
>  which screws up the X server's attempt to map the video memory at
>  0xd0000000.

can you check if you can set up MTRR mapping in BIOS from Continuous
to Discrete?

YH

  parent reply	other threads:[~2008-04-27  0:57 UTC|newest]

Thread overview: 87+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-01-20  4:45 [PATCH] x86: disable_mtrr_trim only need for x86_64 Yinghai Lu
2008-01-20  5:37 ` H. Peter Anvin
2008-01-20  6:55   ` Yinghai Lu
2008-01-20  8:17   ` [PATCH] x86_64: update e820 instead of updating end_pfn Yinghai Lu
2008-01-20  9:20     ` Ingo Molnar
2008-01-20 15:08       ` Andi Kleen
2008-01-21  5:40         ` [PATCH] x86_64: update e820 instead of updating end_pfn v2 Yinghai Lu
2008-01-21  5:44           ` [PATCH] x86_32: trim memory by updating e820 Yinghai Lu
2008-01-21  5:58           ` [PATCH] x86_64: update e820 instead of updating end_pfn v2 Andi Kleen
2008-01-21  6:05             ` Harvey Harrison
2008-01-21  6:08               ` Andi Kleen
2008-01-21  6:14                 ` Li Zefan
2008-01-21  6:57             ` [PATCH] x86_64: check if Tom2 is enabled Yinghai Lu
2008-01-21 17:24               ` Cyrill Gorcunov
2008-01-21 17:39                 ` H. Peter Anvin
2008-01-21 17:49                   ` Cyrill Gorcunov
2008-01-21 18:03                 ` Andi Kleen
2008-01-21 18:09                   ` Cyrill Gorcunov
2008-01-21 18:15                     ` H. Peter Anvin
2008-01-21 18:46                       ` Andi Kleen
2008-01-21  0:00       ` [PATCH] x86_64: update e820 instead of updating end_pfn Yinghai Lu
     [not found] ` <200801202255.02645.yinghai.lu@sun.com>
     [not found]   ` <200801202255.58642.yinghai.lu@sun.com>
2008-01-21  6:56     ` [PATCH] x86_32: trim memory by updating e820 v2 Yinghai Lu
2008-01-21 16:30       ` Jesse Barnes
2008-01-21 19:14         ` Justin Piszcz
2008-01-21 20:09           ` Yinghai Lu
2008-01-21 21:37             ` Justin Piszcz
2008-01-23  3:50               ` Yinghai Lu
2008-01-26  0:01                 ` Justin Piszcz
2008-01-26  0:16                   ` Yinghai Lu
2008-01-26  0:37                     ` Justin Piszcz
2008-01-28 15:09                   ` Ingo Molnar
2008-01-28 18:07                     ` Justin Piszcz
2008-01-22 16:51       ` Ingo Molnar
2008-01-23  0:23         ` [PATCH] x86_32: trim memory by updating e820 v3 Yinghai Lu
2008-04-26 10:56           ` Andrew Morton
2008-04-26 12:56             ` Gabriel C
2008-04-27  1:05               ` Yinghai Lu
2008-04-28 18:07                 ` Eric W. Biederman
2008-04-28 23:16                   ` Yinghai Lu
2008-04-29 10:31                   ` Ingo Molnar
2008-04-29 17:29                     ` Eric W. Biederman
2008-04-29 18:40                       ` Yinghai Lu
2008-04-29 19:19                         ` Eric W. Biederman
2008-04-29 19:44                           ` Yinghai Lu
2008-04-29 20:02                             ` Eric W. Biederman
2008-04-28  6:44               ` Yinghai Lu
2008-04-28  9:18                 ` Gabriel C
2008-04-28  9:34                   ` Yinghai Lu
2008-04-28  9:54                     ` Gabriel C
2008-04-28 10:03                       ` Gabriel C
2008-04-28 10:07                         ` Mika Fischer
2008-04-28 19:03                           ` Yinghai Lu
2008-04-28 13:53                       ` Ingo Molnar
2008-04-28 14:11                         ` Mika Fischer
2008-04-28 14:24                           ` Gabriel C
2008-04-28 19:06                             ` Yinghai Lu
2008-04-28 19:38                               ` Gabriel C
2008-04-28 20:45                                 ` Gabriel C
2008-04-28 21:19                                   ` Gabriel C
2008-04-28 22:03                                     ` Yinghai Lu
2008-04-28 22:56                                       ` Gabriel C
2008-04-28 23:23                                         ` Yinghai Lu
2008-04-29  1:05                                           ` Gabriel C
2008-04-29  2:41                                             ` Yinghai Lu
2008-04-29 10:34                                               ` Ingo Molnar
2008-04-29 10:42                                                 ` Yinghai Lu
2008-04-28 19:08                             ` Yinghai Lu
2008-04-28 19:46                               ` Gabriel C
2008-04-28 14:15                         ` Gabriel C
2008-04-28 16:09                         ` Jesse Barnes
2008-04-28 16:31                           ` Mika Fischer
2008-04-28 16:55                             ` Jesse Barnes
2008-04-29 10:37                           ` Ingo Molnar
2008-04-29 12:40                             ` Andrew Morton
2008-04-29 15:52                             ` Jesse Barnes
2008-04-29 22:03                               ` [patch] PCI: export resource_wc in pci sysfs Ingo Molnar
2008-04-29 22:24                                 ` Andrew Morton
2008-04-27  0:57             ` Yinghai Lu [this message]
2008-04-27  8:21               ` [PATCH] x86_32: trim memory by updating e820 v3 Mika Fischer
2008-04-27  1:22             ` Yinghai Lu
2008-04-27  8:29               ` Mika Fischer
2008-04-28  6:50             ` Yinghai Lu
2008-04-28  8:38               ` Mika Fischer
2008-04-28  9:09                 ` Yinghai Lu
2008-04-28  9:44                   ` Mika Fischer
2008-04-28  9:58                     ` Gabriel C
2008-01-21  6:57   ` [PATCH] x86_64: update e820 instead of updating end_pfn v3 Yinghai Lu

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