From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <45B6CBD9.80600@yahoo.com.au> Date: Wed, 24 Jan 2007 14:00:41 +1100 From: Nick Piggin MIME-Version: 1.0 Subject: Re: [RFC] Limit the size of the pagecache References: In-Reply-To: Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Christoph Lameter Cc: Aubrey Li , Vaidyanathan Srinivasan , Robin Getz , "Henn, erich, Michael" , linux-mm@kvack.org, linux-kernel@vger.kernel.org List-ID: Christoph Lameter wrote: > This is a patch using some of Aubrey's work plugging it in what is IMHO > the right way. Feel free to improve on it. I have gotten repeatedly > requests to be able to limit the pagecache. With the revised VM statistics > this is now actually possile. I'd like to know more about possible uses of > such a feature. > > > > > It may be useful to limit the size of the page cache for various reasons > such as > > 1. Insure that anonymous pages that may contain performance > critical data is never subject to swap. > > 2. Insure rapid turnaround of pages in the cache. So if these two aren't working properly at 100%, then I want to know the reason why. Or at least see what the workload and the numbers look like. > > 3. Reserve memory for other uses? (Aubrey?) Maybe. This is still a bad hack, and I don't like to legitimise such use though. I hope Aubrey isn't relying on this alone for his device to work because his customers might end up hitting fragmentation problems sooner or later. -- SUSE Labs, Novell Inc. Send instant messages to your online friends http://au.messenger.yahoo.com -- 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-mm.org/ . Don't email: email@kvack.org