From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Fri, 10 Dec 1999 00:21:18 +0100 (CET) From: Ingo Molnar Subject: Re: Getting big areas of memory, in 2.3.x? In-Reply-To: <199912092054.MAA57205@google.engr.sgi.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org Return-Path: To: Kanoj Sarcar Cc: Rik van Riel , jgarzik@mandrakesoft.com, alan@lxorguk.ukuu.org.uk, linux-kernel@vger.rutgers.edu, linux-mm@kvack.org List-ID: On Thu, 9 Dec 1999, Kanoj Sarcar wrote: > Well, at least in 2.3, kernel data (and page caches) are below 1G, > which means there's a lot of memory possible out there with > references only from user memory. Shm page references are > revokable too. [...] we already kindof replace pages, see replace_with_highmem(). Reverse ptes do help, but are not a necessity to get this. Neither reverse ptes, nor any other method guarantees that a large amount of continuous RAM can be allocated. Only boot-time allocation can be guaranteed. -- mingo -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://humbolt.geo.uu.nl/Linux-MM/