From: "Jun Hu" <duanshuidao@hotmail.com>
To: linux-mm <linux-mm@kvack.org>
Subject: [help] kernel boot parameter "mem=xx" disparity
Date: Wed, 17 Oct 2012 08:55:14 +0800 [thread overview]
Message-ID: <COL115-DS17FCFB8683288781F8E011BC770@phx.gbl> (raw)
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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
when I didn't append "mem=" parmeter, "free -m " shows that total memory is 7892M ,
it only eat up 300M (8192-7892), though I don't know where the 300M memory go.
why?
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next reply other threads:[~2012-10-17 0:55 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-17 0:55 Jun Hu [this message]
2012-10-17 1:43 ` KOSAKI Motohiro
2012-10-17 3:18 ` Jun Hu
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