lkml.org 
[lkml]   [2007]   [Apr]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: 4GB Physical. Less than 3GB in Linux.
    Jeff Chua wrote:
    > I've noticed that with 4GB physical ram, I'm only see 3098000 MB on
    > the Dell 745, and 3107056MB on the IBM X60s.
    >
    > I've tested with CONFIG_HIGHMEM4G=y, CONFIG_HIGHMEM64G=y,
    > CONFIG_X86_PAE=y, but nothing makes any difference.

    Chipset limitation. It uses up most of the MMIO region above 3GB
    preventing RAM from being mapped there, and doesn't support remapping
    the covered RAM to above 4GB. Nothing the kernel can do about it.

    --
    Robert Hancock Saskatoon, SK, Canada
    To email, remove "nospam" from hancockr@nospamshaw.ca
    Home Page: http://www.roberthancock.com/

    -
    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/

    \
     
     \ /
      Last update: 2007-04-16 16:37    [W:0.021 / U:29.356 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site