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Re: [PATCH] [4/7] Don't use large pages to map the first 2/4MB of memory

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From: Andi Kleen <andi@...>
To: Eric Dumazet <dada1@...>
Cc: Andi Kleen <andi@...>, <andreas.herrmann3@...>, <tglx@...>, <mingo@...>, <linux-kernel@...>
Subject: Re: [PATCH] [4/7] Don't use large pages to map the first 2/4MB of memory
Date: Wednesday, March 12, 2008 - 5:19 am

> Should we then change CONFIG_PHYSICAL_START from 0x100000 to 0x400000 ?

Yes that would be probably a good idea. This means for PAE and 64bit
kernels 2MB is ok too, for i386 non PAE 4MB. The SUSE 64bit kernels have been 
using that for quite some time.

-Andi
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[PATCH] [1/7] Implement true end_pfn_mapped for 32bit, Andi Kleen, (Tue Mar 11, 10:53 pm)
[PATCH] [7/7] CPA: Add statistics about state of direct mapp..., Andi Kleen, (Tue Mar 11, 10:53 pm)
Re: [PATCH] [7/7] CPA: Add statistics about state of direct ..., Thomas Gleixner, (Fri Mar 21, 1:41 pm)
Re: [PATCH] [7/7] CPA: Add statistics about state of direct ..., Andi Kleen, (Fri Mar 21, 1:55 pm)
[PATCH] CPA: Add statistics about state of direct mapping v3, Andi Kleen, (Sat Mar 22, 5:50 am)
Re: [PATCH] CPA: Add statistics about state of direct mappin..., Thomas Gleixner, (Tue Mar 25, 11:40 am)
Re: [PATCH] CPA: Add statistics about state of direct mappin..., Andi Kleen, (Tue Mar 25, 12:14 pm)
Re: [PATCH] CPA: Add statistics about state of direct mappin..., Thomas Gleixner, (Tue Mar 25, 12:16 pm)
Re: [PATCH] CPA: Add statistics about state of direct mappin..., Andi Kleen, (Tue Mar 25, 1:01 pm)
[PATCH] [6/7] Split large page mapping for AMD TSEG, Andi Kleen, (Tue Mar 11, 10:53 pm)
Re: [PATCH] [6/7] Split large page mapping for AMD TSEG, Thomas Gleixner, (Tue Mar 25, 12:44 pm)
Re: [PATCH] [6/7] Split large page mapping for AMD TSEG, Andi Kleen, (Tue Mar 25, 12:54 pm)
Re: [PATCH] [6/7] Split large page mapping for AMD TSEG, Thomas Gleixner, (Fri Mar 21, 1:55 pm)
Re: [PATCH] [6/7] Split large page mapping for AMD TSEG, Joerg Roedel, (Tue Mar 25, 7:56 am)
[PATCH] [5/7] Readd rdmsrl_safe, Andi Kleen, (Tue Mar 11, 10:53 pm)
Re: [PATCH] [5/7] Readd rdmsrl_safe, Thomas Gleixner, (Fri Mar 21, 1:06 pm)
[PATCH] Readd rdmsrl_safe v2, Andi Kleen, (Sat Mar 22, 5:59 am)
Re: [PATCH] [5/7] Readd rdmsrl_safe, Andi Kleen, (Fri Mar 21, 1:16 pm)
Re: [PATCH] [5/7] Readd rdmsrl_safe, Thomas Gleixner, (Fri Mar 21, 1:58 pm)
Re: [PATCH] [5/7] Readd rdmsrl_safe, Andi Kleen, (Fri Mar 21, 2:06 pm)
Re: [PATCH] [5/7] Readd rdmsrl_safe, Thomas Gleixner, (Fri Mar 21, 2:14 pm)
Re: [PATCH] [5/7] Readd rdmsrl_safe, Andi Kleen, (Fri Mar 21, 2:46 pm)
Re: [PATCH] [5/7] Readd rdmsrl_safe II, Andi Kleen, (Fri Mar 21, 2:48 pm)
[PATCH] [4/7] Don't use large pages to map the first 2/4MB o..., Andi Kleen, (Tue Mar 11, 10:53 pm)
Re: [PATCH] [4/7] Don't use large pages to map the first 2/4..., Thomas Gleixner, (Fri Mar 21, 1:45 pm)
Re: [PATCH] [4/7] Don't use large pages to map the first 2/4..., Andi Kleen, (Fri Mar 21, 1:59 pm)
Re: [PATCH] [4/7] Don't use large pages to map the first 2/4..., Thomas Gleixner, (Fri Mar 21, 2:03 pm)
Re: [PATCH] [4/7] Don't use large pages to map the first 2/4..., Andi Kleen, (Fri Mar 21, 2:44 pm)
Re: [PATCH] [4/7] Don't use large pages to map the first 2/4..., Eric Dumazet, (Wed Mar 12, 1:38 am)
Re: [PATCH] [4/7] Don't use large pages to map the first 2/4..., Andi Kleen, (Wed Mar 12, 5:19 am)
Re: [PATCH] [4/7] Don't use large pages to map the first 2/4..., Joerg Roedel, (Tue Mar 25, 7:31 am)
Re: [PATCH] [4/7] Don't use large pages to map the first 2/4..., Andi Kleen, (Tue Mar 25, 7:39 am)
[PATCH] [3/7] Add set_memory_4k to pageattr.c, Andi Kleen, (Tue Mar 11, 10:53 pm)
[PATCH] [2/7] Account overlapped mappings in end_pfn_map, Andi Kleen, (Tue Mar 11, 10:53 pm)