[help] kernel boot parameter "mem=? disparity
Hi Guys: My machine has 8G memory, when I use kernel boot parameter mem=5G , it only display ��4084 M�� using ��free �Cm ��. where the ��5120-4084 = 1036M �� memory run? # /bin/uname -a Linux dom0-93 3.0.13-0.27-default #1 SMP Wed Feb 15 13:33:49 UTC 2012 (d73692b) x86_64 x86_64 x86_64 GNU/Linux dom0-93:~ # free -m total used free shared buffers cached Mem: 4084 259 3824 0 6 84 -/+ buffers/cache: 169 3915 Swap: 1916 0 1916 dom0-93:~ # cat /proc/cmdline root=/dev/disk/by-id/cciss-3600508b100104839535656314933001b-part1 resume=/dev/disk/by-id/cciss-3600508b100104839535656314933001b-part2 splash=silent crashkernel=256M-:128M vga=0x317 mem=5120M why ? details info ,please see the attachment.
Hi Jun (replying to all this time), On Mon, Oct 15, 2012 at 12:58 AM, Jun Hu <duanshuidao@hotmail.com> wrote:
Hi Guys: My machine has 8G memory, when I use kernel boot parameter mem=5G , it only display “4084 M” using “free –m “. where the “5120-4084 = 1036M “ memory run?
That's the memory taken up by the kernel itself. -- Dave Hylands Shuswap, BC, Canada http://www.davehylands.com
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Dave Hylands -
Jun Hu