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Re: [PATCH] x86: disable_mtrr_trim only need for x86_64

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From: H. Peter Anvin <hpa@...>
To: Yinghai Lu <Yinghai.Lu@...>
Cc: Ingo Molnar <mingo@...>, Andi Kleen <ak@...>, LKML <linux-kernel@...>, Jesse Barnes <jesse.barnes@...>, Andrew Morton <akpm@...>
Subject: Re: [PATCH] x86: disable_mtrr_trim only need for x86_64
Date: Sunday, January 20, 2008 - 1:37 am

Yinghai Lu wrote:

That seems like a bug, and if so this patch goes the wrong direction. 
(If the 32-bit code has another solution for the same problem, they 
should be unified.)

The trimming of uncachable memory affects both 32- and 64-bit kernels; 
it's the same hardware, and even 32-bit kernels (with PAE) can access 
memory above 4 GB.

	-hpa
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Messages in current thread:
[PATCH] x86: disable_mtrr_trim only need for x86_64, Yinghai Lu, (Sun Jan 20, 12:45 am)
Re: [PATCH] x86: disable_mtrr_trim only need for x86_64, H. Peter Anvin, (Sun Jan 20, 1:37 am)
Re: [PATCH] x86: disable_mtrr_trim only need for x86_64, Yinghai Lu, (Sun Jan 20, 2:55 am)
[PATCH] x86_64: update e820 instead of updating end_pfn, Yinghai Lu, (Sun Jan 20, 4:17 am)
Re: [PATCH] x86_64: update e820 instead of updating end_pfn, Ingo Molnar, (Sun Jan 20, 5:20 am)
Re: [PATCH] x86_64: update e820 instead of updating end_pfn, Yinghai Lu, (Sun Jan 20, 8:00 pm)
Re: [PATCH] x86_64: update e820 instead of updating end_pfn, Andi Kleen, (Sun Jan 20, 11:08 am)
[PATCH] x86_64: update e820 instead of updating end_pfn v2, Yinghai Lu, (Mon Jan 21, 1:40 am)
Re: [PATCH] x86_64: update e820 instead of updating end_pfn v2, Andi Kleen, (Mon Jan 21, 1:58 am)
[PATCH] x86_64: check if Tom2 is enabled, Yinghai Lu, (Mon Jan 21, 2:57 am)
Re: [PATCH] x86_64: check if Tom2 is enabled, Cyrill Gorcunov, (Mon Jan 21, 1:24 pm)
Re: [PATCH] x86_64: check if Tom2 is enabled, Andi Kleen, (Mon Jan 21, 2:03 pm)
Re: [PATCH] x86_64: check if Tom2 is enabled, Cyrill Gorcunov, (Mon Jan 21, 2:09 pm)
Re: [PATCH] x86_64: check if Tom2 is enabled, H. Peter Anvin, (Mon Jan 21, 2:15 pm)
Re: [PATCH] x86_64: check if Tom2 is enabled, Andi Kleen, (Mon Jan 21, 2:46 pm)
Re: [PATCH] x86_64: check if Tom2 is enabled, H. Peter Anvin, (Mon Jan 21, 1:39 pm)
Re: [PATCH] x86_64: check if Tom2 is enabled, Cyrill Gorcunov, (Mon Jan 21, 1:49 pm)
Re: [PATCH] x86_64: update e820 instead of updating end_pfn v2, Harvey Harrison, (Mon Jan 21, 2:05 am)
Re: [PATCH] x86_64: update e820 instead of updating end_pfn v2, Andi Kleen, (Mon Jan 21, 2:08 am)
Re: [PATCH] x86_64: update e820 instead of updating end_pfn v2, Li Zefan, (Mon Jan 21, 2:14 am)
[PATCH] x86_32: trim memory by updating e820, Yinghai Lu, (Mon Jan 21, 1:44 am)