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Re: [bigmem-patch] 4GB with Linux on IA32

To: Linus Torvalds <torvalds@transmeta.com>
Subject: Re: [bigmem-patch] 4GB with Linux on IA32
From: Andrea Arcangeli <andrea@suse.de>
Date: Tue, 17 Aug 1999 14:40:50 +0200 (CEST)
cc: Alan Cox <alan@lxorguk.ukuu.org.uk>, Kanoj Sarcar <kanoj@google.engr.sgi.com>, sct@redhat.com, Gerhard.Wichert@pdb.siemens.de,Winfried.Gerhard@pdb.siemens.de, linux-kernel@vger.rutgers.edu, linux-mm@kvack.org
In-Reply-To: <Pine.LNX.4.10.9908162331400.1048-100000@penguin.transmeta.com>
Sender: owner-linux-mm@kvack.org

On Mon, 16 Aug 1999, Linus Torvalds wrote:

>pages only may be enough for many things. Especially if anonymous pages
>_prefer_ the high-memory pages.

Yes shm/vmalloc/anonymous memory always prefer the high-memory pages.

>Oh, and copied-on-write pages count as anonymous, I assume you did that
>already (ie when you allocate a new page and copy the old contents into
>it, you might as well consider the new page to be anonymous, even though
>it gets its initial data from a potentially non-anonymous page).

Yes, the copy-on-write always prefer the bigmem pages for the allocation.

Andrea

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References:
- Re: [bigmem-patch] 4GB with Linux on IA32
  - From: Linus Torvalds <torvalds@transmeta.com>

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