From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail190.messagelabs.com (mail190.messagelabs.com [216.82.249.51]) by kanga.kvack.org (Postfix) with SMTP id 60B806B0071 for ; Wed, 1 Dec 2010 10:01:37 -0500 (EST) Date: Wed, 1 Dec 2010 09:01:32 -0600 (CST) From: Christoph Lameter Subject: Re: [PATCH 3/3] Provide control over unmapped pages In-Reply-To: <20101130142509.4f49d452.akpm@linux-foundation.org> Message-ID: References: <20101130101126.17475.18729.stgit@localhost6.localdomain6> <20101130101602.17475.32611.stgit@localhost6.localdomain6> <20101130142509.4f49d452.akpm@linux-foundation.org> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org To: Andrew Morton Cc: Balbir Singh , linux-mm@kvack.org, linux-kernel@vger.kernel.org, kvm List-ID: On Tue, 30 Nov 2010, Andrew Morton wrote: > > +#define UNMAPPED_PAGE_RATIO 16 > > Well. Giving 16 a name didn't really clarify anything. Attentive > readers will want to know what this does, why 16 was chosen and what > the effects of changing it will be. The meaning is analoguous to the other zone reclaim ratio. But yes it should be justified and defined. > > Reviewed-by: Christoph Lameter > > So you're OK with shoving all this flotsam into 100,000,000 cellphones? > This was a pretty outrageous patchset! This is a feature that has been requested over and over for years. Using /proc/vm/drop_caches for fixing situations where one simply has too many page cache pages is not so much fun in the long run. -- 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/ . Fight unfair telecom policy in Canada: sign http://dissolvethecrtc.ca/ Don't email: email@kvack.org