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Re: [PATCH] [7/7] CPA: Add statistics about state of direct mapping v2

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From: Andi Kleen <andi@...>
To: Thomas Gleixner <tglx@...>
Cc: Andi Kleen <andi@...>, <andreas.herrmann3@...>, <mingo@...>, <linux-kernel@...>
Subject: Re: [PATCH] [7/7] CPA: Add statistics about state of direct mapping v2
Date: Friday, March 21, 2008 - 1:55 pm

On Fri, Mar 21, 2008 at 06:41:59PM +0100, Thomas Gleixner wrote:

But it's not debugging. Or are you saying all memory state information
in /proc/meminfo is debugging information?  I would say it is generic
memory state tracking, similar to VmallocUsed or Slab: or NFS_Unstable:
e.g. I would expect a machine to go slower if all direct mapping pages
are split due to increase TLB misses and that information is generally
useful and should not be forced into some debugging ghetto.

-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)