Messages in this thread | | | Date | Thu, 2 Oct 2008 16:45:49 -0700 | From | "Yinghai Lu" <> | Subject | Re: [PATCH 2/2] x86: mtrr_cleanup try gran_size to less than 1M |
| |
On Thu, Oct 2, 2008 at 4:20 PM, J.A. Magallón <jamagallon@ono.com> wrote: > On Thu, 2 Oct 2008 15:39:34 -0700, "Yinghai Lu" <yinghai@kernel.org> wrote: > > Oops, sorry, this is without cleanup. This is a distro kernel and is built > but not enable by deafult. As it is rc7, I will use 'enble_mtrr_cleanup' ;): > > cicely:~# cat /proc/mtrr > reg00: base=0x00000000 ( 0MB), size=2048MB: write-back, count=1 > reg01: base=0x100000000 (4096MB), size=1024MB: write-back, count=1 > reg02: base=0x140000000 (5120MB), size= 512MB: write-back, count=1 > reg03: base=0x160000000 (5632MB), size= 256MB: write-back, count=1 > > I have lost 2Gb ?
that is memhole
> > cicely:~# free > total used free shared buffers cached > Mem: 3755568 182348 3573220 0 14024 72716 > -/+ buffers/cache: 95608 3659960 > > I can't easily try your patch, this is a distro kernel. > I will get the src.rpm...
just pull tip/master, and use your config from /boot/config....
> > Ahhhhh.... > > This is a dual opteron board. dmidecode says: > > Handle 0x0026, DMI type 16, 15 bytes > Physical Memory Array > Location: System Board Or Motherboard > Use: System Memory > Error Correction Type: Single-bit ECC > Maximum Capacity: 8 GB > Error Information Handle: Not Provided > Number Of Devices: 8 > > So it maps one Opteron memory in first 4Gb and the other on the second 4Gb. > So I should have 2Gb@0 and 2Gb@4Gb. > What I don't know is why the bios eats up 256Mb.
check if you enable memhole remapping in BIOS.
YH -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |