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From: Roland Dreier <rolandd@cisco.com>
To: Marcel Holtmann <marcel@holtmann.org>
Cc: linux-kernel@vger.kernel.org
Subject: Re: 4GB memory and Intel Dual-Core system
Date: Thu, 27 Oct 2005 13:44:19 -0700	[thread overview]
Message-ID: <52mzkuwuzg.fsf@cisco.com> (raw)
In-Reply-To: <1130445194.5416.3.camel@blade> (Marcel Holtmann's message of "Thu, 27 Oct 2005 22:33:14 +0200")

    Marcel> The BIOS and dmidecode tells me that I have 4 GB of RAM
    Marcel> installed and I don't have any idea where to look for
    Marcel> details. What information do you need to analyze this?

Look at the e820 dump in your kernel bootlog.  I'll bet you'll see a
big chunk of reserved address space.  Do you have any PCI devices like
video cards that use a lot of PCI address space?

I don't know if EM64T systems (or whatever the right term is) have a
way of remapping some RAM above 4 GB so that you can use all your
memory in a case like this.

 - R.

  reply	other threads:[~2005-10-27 20:44 UTC|newest]

Thread overview: 48+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-10-27 20:33 4GB memory and Intel Dual-Core system Marcel Holtmann
2005-10-27 20:44 ` Roland Dreier [this message]
2005-10-27 20:51   ` Marcel Holtmann
2005-10-27 20:54     ` Roland Dreier
2005-10-27 21:00       ` Marcel Holtmann
2005-10-27 21:06         ` Roland Dreier
2005-10-27 21:08           ` Marcel Holtmann
2005-10-27 21:10         ` Alejandro Bonilla
2005-10-27 20:57     ` Alejandro Bonilla
2005-10-27 20:54   ` Alejandro Bonilla
2005-10-27 20:57     ` Marcel Holtmann
2005-10-27 21:02       ` Alejandro Bonilla
2005-10-27 21:07         ` Marcel Holtmann
2005-10-27 21:15           ` Alejandro Bonilla
2005-10-27 21:19             ` Marcel Holtmann
2005-10-27 22:26               ` Joe Bob Spamtest
2005-10-27 22:05             ` Dave Jones
2005-10-27 22:09               ` Vladimir Lazarenko
2005-11-02 16:21                 ` Lennart Sorensen
2005-10-27 22:11               ` Marcel Holtmann
2005-10-27 22:12                 ` Dave Jones
2005-10-27 22:17                   ` Marcel Holtmann
2005-10-27 22:20                     ` Alejandro Bonilla
2005-10-28  0:33                       ` Bernd Eckenfels
2005-10-30 22:26                       ` Alan Cox
2005-10-31  3:39                         ` Alejandro Bonilla Beeche
2005-10-31 13:02                           ` Alan Cox
2005-10-31 23:03                         ` Martin J. Bligh
2005-11-01  5:03                           ` thockin
2005-10-27 22:29                     ` Joel Jaeggli
2005-10-27 22:13               ` Alejandro Bonilla
2005-10-27 22:18                 ` Marcel Holtmann
2005-10-28  2:35             ` Fawad Lateef
2005-10-28  3:09               ` Joel Jaeggli
2005-10-28  7:19                 ` Fawad Lateef
2005-10-28 15:56               ` Joe Bob Spamtest
2005-10-28 15:29             ` Eric W. Biederman
2005-10-28 15:45               ` Alejandro Bonilla
2005-10-28 16:09                 ` Eric W. Biederman
2005-10-30 22:24             ` Alan Cox
2005-11-02 16:20             ` Lennart Sorensen
2005-10-27 22:12   ` Andi Kleen
2005-10-27 21:09 ` linux-os (Dick Johnson)
2005-10-27 21:32 ` Bernd Eckenfels
  -- strict thread matches above, loose matches on Subject: below --
2005-10-28 20:58 Lukas Hejtmanek
2005-10-29  3:32 ` Dave Jones
2005-10-29 11:15   ` Marcel Holtmann
2005-10-30  6:49     ` Dave Jones

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