Re: [PATCH] x86_32: trim memory by updating e820 v2

[Justin Piszcz]

On Tue, 22 Jan 2008, Yinghai Lu wrote:

On Monday 21 January 2008 01:37:09 pm Justin Piszcz wrote:

On Mon, 21 Jan 2008, Yinghai Lu wrote:

On Monday 21 January 2008 11:14:02 am Justin Piszcz wrote:
please get x86.git

 git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git
 cd linux-2.6
 #--------------{ x86.git instructions }---------->
 # Add Linus's tree as a remote
 git remote add linus 
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git

 # Add Ingo's tree as a remote
 git remote add x86 
git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86.git

 # With that setup, just run the following to get any changes you
 # don't have.  It will also notice any new branches Ingo/Linus
 # add to their repo.  Look in .git/config afterwards, the format
 # to add new remotes is easy to figure out.
 git remote update
 #-------------------------
 git merge x86/master
 git merge x86/mm

and apply

[PATCH] x86_64: check if Tom2 is enabled
http://lkml.org/lkml/2008/1/21/20
[PATCH] x86_64: update e820 instead of updating end_pfn v3
http://lkml.org/lkml/2008/1/21/19
[PATCH] x86_32: trim memory by updating e820 v2
http://lkml.org/lkml/2008/1/21/18

YH

Thanks, I am all patched up and ready to test, unfortunately one of my disks
in my RAID 1 just died, I already filled out the advanced replacement form,
I will test when I receive the replacement disk.

please get x86.git and apply
[PATCH] x86_32: trim memory by updating e820 v3
http://lkml.org/lkml/2008/1/22/394

Ingo already put other two into the tree.

Thanks

YH

Tried it, it worked successfully!



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.

File: dmesg-e820v3patch.txt.bz2

Justin.

With stock kernel, previous way I had to use it was mem=8832M and top showed this:

dmesg-e820v3patch.txt.bz2
Description: Binary data