Re: fedora newbie

From: James Wilkinson (james_at_westexe.demon.co.uk)
Date: 09/29/04

  • Next message: Joe Pitts: "RPM/Up2Date errors ???" 
    Date: Wed, 29 Sep 2004 01:05:51 +0100
To: For users of Fedora Core releases <fedora-list@redhat.com>

    Joey Kelley wrote:
    > I was going over the specs of FC2 a while ago, and in FC2 the maximum
    > size of the RAM that can be accessed is 4 GB, with an additional 4 GB of swap
    > partition (to quote a mac term, Virtual Ram or the linux version of the Windows
    > temporary files)

    Um. It sounds like you've misunderstood the 4G/4G split.

    The maximum memory Fedora can use is the maximum that the underlying
    kernel can use. On x64-64, that should be 1 TB = 1024 GB IF you can find
    the hardware to support it! On x86, that is 64 GB with Intel's PAE mode.

    It also supports up to 32 swap files or partitions, each of up to 2 GB
    on x86 (according to man mkswap). (No idea what the x86-64 limit is: the
    underlying hardware can't use more than 1024 TB of virtual memory...)

    The 4G/4G split is to do with how an individual process views memory.
    There's a part of the chip called the Memory Management Unit which,
    together with the kernel's virtual memory subsystem, selects 4K pages
    from real memory, swap, and other places to make up 4 GB for the process
    and 4 GB of easily-accessible RAM for kernel mode.

    Hope this helps,

    James. 

    -- 
E-mail address: james | actor: (n) a piece of scenery that has the audacity
@westexe.demon.co.uk  | to move once lit.
-- 
fedora-list mailing list
fedora-list@redhat.com
To unsubscribe: http://www.redhat.com/mailman/listinfo/fedora-list
  • Next message: Joe Pitts: "RPM/Up2Date errors ???"

    Relevant Pages

    • Re: ubuntu-users Digest, Vol 56, Issue 345
      ... Virtual memory issues in Jaunty ... pdf program with a printer driver for ubuntu ... A USB drive as 160 GB partition sole purpose data ... you lost me on the find when you get to grub prompt. ...
      (Ubuntu)
    • Re: XP Pro - Swap File Size for Modern Systems
      ... If you want full memory dumps for analyzing crashes, ... minimum size to at least be equal to the installed ram. ... the partition as well. ... > What is the optimal size for the swap file for Windows XP Pro. ...
      (microsoft.public.windowsxp.general)
    • Re: trying to fix low memory warning
      ... Whilst we do not know what is the installed RAM memory in this case the ... Therefore, the need for a much larger partition, to ... >>> install ... >>> BootIt on the HD, to avoid installing the boot manager also, if you ...
      (microsoft.public.windowsxp.basics)
    • Re: Disk to disk copying with overclocked memory
      ... >If I copy a partition from one hard drive to another, ... Or other memory timing intervals might also be set to be ... >data fairly independently of the memory on the motherboard. ... >Copying a partition from one hard drive to another which is on ...
      (microsoft.public.windowsxp.general)
    • Re: What "EWF RAM REG" XPE computer can do???
      ... > RAM, the more likely you are to see the "Delayed Write Failed" message. ... > This is usually a result of the system running out of memory. ... You would install your OS onto the first partition and setup ... > protect your operating system and your CF device. ...
      (microsoft.public.windowsxp.embedded)