From: Justin Piszcz <jpiszcz@lucidpixels.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: Yinghai Lu <Yinghai.Lu@Sun.COM>,
Jesse Barnes <jesse.barnes@intel.com>, Andi Kleen <ak@suse.de>,
"H. Peter Anvin" <hpa@zytor.com>,
LKML <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH] x86_32: trim memory by updating e820 v2
Date: Mon, 28 Jan 2008 13:07:33 -0500 (EST) [thread overview]
Message-ID: <alpine.DEB.1.00.0801281307090.10823@p34.internal.lan> (raw)
In-Reply-To: <20080128150957.GA12205@elte.hu>
On Mon, 28 Jan 2008, Ingo Molnar wrote:
>
> * Justin Piszcz <jpiszcz@lucidpixels.com> wrote:
>
>> Tried it, it worked successfully!
>>
>> With stock kernel, previous way I had to use it was mem=8832M and top
>> showed this:
>>
>> top - 18:53:52 up 1 min, 2 users, load average: 1.03, 0.30, 0.10
>> Tasks: 169 total, 1 running, 168 sleeping, 0 stopped, 0 zombie
>> Cpu(s): 6.1%us, 2.6%sy, 4.5%ni, 81.3%id, 5.5%wa, 0.0%hi, 0.0%si, 0.0%st
>> Mem: 8039464k total, 1288948k used, 6750516k free, 3640k buffers
>> Swap: 16787768k total, 0k used, 16787768k free, 178528k cached
>>
>> With kernel you mentioned and use e820 v3:
>>
>> top - 18:48:13 up 3 min, 6 users, load average: 1.67, 0.68, 0.25
>> Tasks: 195 total, 2 running, 193 sleeping, 0 stopped, 0 zombie
>> Cpu(s): 18.5%us, 1.2%sy, 1.6%ni, 74.8%id, 3.9%wa, 0.0%hi, 0.0%si, 0.0%st
>> Mem: 8037668k total, 1438732k used, 6598936k free, 6844k buffers
>> Swap: 16787768k total, 0k used, 16787768k free, 273928k cached
>>
>> No append mem= required.
>>
>> A full dmesg is attached so you can analyze the e820/MTRR mapping.
>
> thanks for testing it! The code indeed successfully trimmed your memory
> map by 64MB:
>
> from:
>
> [ 0.000000] BIOS-e820: 0000000100000000 - 000000022c000000 (usable)
>
> to:
>
> [ 0.000000] modified: 0000000100000000 - 0000000228000000 (usable)
> [ 0.000000] modified: 0000000228000000 - 000000022c000000 (reserved)
>
> what happened on your box previously when you booted without any
> trimming - did it sometimes slow down or something like that?
>
> Ingo
>
When I boot the box without any trimming it acts like a 286 or 386, takes
about 10 minutes to boot (using raptor disks).
Justin.
next prev parent reply other threads:[~2008-01-28 18:07 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 [this message]
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 ` [PATCH] x86_32: trim memory by updating e820 v3 Yinghai Lu
2008-04-27 8:21 ` 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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