linux-kernel - limiting node (NUMA) memory

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Message-ID: <314707.76667.qm@web30506.mail.mud.yahoo.com>
Date:	Wed, 27 Dec 2006 03:58:29 -0800 (PST)
From:	Rajesham Gajjela <rajeshamg@...oo.com>
To:	linux-kernel@...r.kernel.org
Cc:	rajeshamg@...oo.com
Subject: limiting node (NUMA) memory 

PS: Please cc me I am not on the list:

On 2.6.7 kernel & x86_64 arch, I am trying to limit
the each node memory. I have 4 CPUs on my system and
therefore 4 nodes will be setup. Total RAM is 8G, and
each node will have 2G mem. But at times, I may want
to limit each node mem to 1G - some thing like:
memnode="1G,1G,2G,2G" on the grub. I have written the 
below patch, which is not working. With this patch, 
the machine keeps on rebooting after initrd stage:

 Booting 'Red Hat Enterprise Linux AS
(2.6.7-aruba_0.0.0.49309)'

kernel /vmlinuz-2.6.7-aruba_0.0.0.49309
root=/dev/system/rootvol console=ttyS0,
9600n8 SPEED=9600 CONSOLE=serial ide=nodma
ramdisk_size=40000 quiet hangcheck_t
imer.hangcheck_reboot=1 memnode="1g,1g,1g,2M" gdb=0
   [Linux-bzImage, setup=0x1400, size=0x1e387c]
initrd /initrd-2.6.7-aruba_0.0.0.49309.img
   [Linux-initrd @ 0x37a38000, 0x5b7016 bytes]

Any pointers on my mistake(s) is appreciated.

Rajesham

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