From mboxrd@z Thu Jan 1 00:00:00 1970 Subject: Re: [patch] vmfixes-2.4.0-test9-B2 - fixing deadlocks References: <20000925213242.A30832@athlon.random> <20000926002812.C5010@athlon.random> From: "Juan J. Quintela" In-Reply-To: Andrea Arcangeli's message of "Tue, 26 Sep 2000 00:28:12 +0200" Date: 26 Sep 2000 00:30:28 +0200 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: owner-linux-mm@kvack.org Return-Path: To: Andrea Arcangeli Cc: Rik van Riel , "Stephen C. Tweedie" , Ingo Molnar , Linus Torvalds , Roger Larsson , MM mailing list , linux-kernel@vger.kernel.org List-ID: >>>>> "andrea" == Andrea Arcangeli writes: Hi andrea> I'm talking about the fact that if you have a file mmapped in 1.5G of RAM andrea> test9 will waste time rolling between LRUs 384000 pages, while classzone andrea> won't ever see 1 of those pages until you run low on fs cache. Which is completely wrong if the program uses _any not completely_ unusual locality of reference. Think twice about that, it is more probable that you need more that 300MB of filesystem cache that you have an aplication that references _randomly_ 1.5GB of data. You need to balance that _always_ :(((((( I think that there is no silver bullet here :( Later, Juan. -- In theory, practice and theory are the same, but in practice they are different -- Larry McVoy -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux.eu.org/Linux-MM/